Artigos de Revista
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Analysis of forces on a submarine outfall by a RANS-VoF numerical wave tank
Knowledge of forces due to the action of waves on submarine outfalls composed by a pipe and stabilizing concrete weights, considering the wave propagation direction to the outfalls, is essential to their design. 3D numerical models based on RANS-VoF (Reynolds-Average-Navier-Stokes Volume-of-Fluid) are able to estimate forces on the pipe and weights. The present study aims to simulate a submarine outfall with stabilizing concrete weights at 1:15 scale which was previously tested in the 3D Shallow Water Basin at the Danish Hydraulics Institute (DHI) to analyse the influence of the direction of the incident wave and the distance from the pipe to the bottom on the outfall forces. In this study, numerical results are compared with experimental ones for waves with four different amplitudes and with wave incidence perpendicular to the outfall. The use of k-
Ano: 2019
Número Páginas:
50-59pp.
Autor(es): Didier, E.; Neves, M. G.; Teixeira, P.
Revista: Defect and Diffusion Forum
Editor: Trans Tech Publications Ltd, Switzerland
Volume:
Vol. 396.
Keywords: Numerical wave tank; RANS-VoF; Forces; Submarine outfalls
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Damage progression in rubble-mound breakwaters scale model tests, under a climate change storm sequence
This paper describes the two-dimensional (2D) physical model tests of a rock armor breakwater, performed at LNEC´s experimental facilities, under the framework of the HYDRALAB+ project. The aim of the present work was to evaluate damage evolution under future climate change scenarios, by using different damage evaluation techniques. The tested wave conditions simulated a storm sequence where two water levels (low water and high water) were considered, as well as an increase of the wave height. The water levels and the wave heights were chosen to simulate extreme events forecasted on climate change scenarios. Damage evaluation was based on the traditional counting method and on stereo-photogrammetric techniques. Test results are presented in terms of the damage parameter S and in terms of the percentage of removed armor units. The analysis is focused on the damage progression during the scale model tests, for the imposed storm sequence. The damage presents an oscillating behavior with two main damage areas corresponding to the active zones for each level, due to the variation of the water level between low-water and high-water. This behavior differs significantly from that found for the common storm sequences usually tested, where the water level does not change. Both measuring techniques lead to an intermediate damage of the cross-section breakwater. However, the damage parameter assessment with the stereo-photogrammetric technique allows a more versatile evaluation, since it is possible to characterize damage in representative zones of the cross-section
Ano: 2019
Autor(es): Fortes, C. J. E. M.; Lemos, R.; Mendonça, A. C.; Reis, M. T. L. G. V.
Revista: Journal of Research on Engineering Structures and Materials (RESM)
Editor: MIM Research Group
Volume:
Vol. 5 Iss. 4.
Keywords: Stereo-photogrammetric techniques; Climate change; Rubble-mound breakwaters; Damage progression
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Experimental investigation on the power capture of an oscillating wave surge converter in unidirectional waves
The aim of this paper is the experimental characterization of the capture width ratio (CWR) and response amplitude operator (RAO) of a 1:10 physical model of an oscillating wave surge converter (OWSC), under unidirectional regular and irregular waves. The effects of hydraulic power take-off (PTO) system are explicitly taken in consideration. A mathematical model is proposed to describe the PTO damping as a function of the angular velocity of the flap. The harmonic decomposition of free-surface elevation, angular velocity of the flap and pressure in the PTO system demonstrates that these signals are dominated by their linear component. However, the signals also present some important higher-order frequency components. To predict the CWR of the OWSC under irregular waves the nonlinear output frequency response functions are considered as the extension of the RAO to the nonlinear case. It is shown and discussed that the PTO system, wave frequency and height have a significant influence on the CWR and RAO. The RAO curve for irregular waves does not exhibit a well-defined peak, showing a limited variation in a broadband. A weak correlation between CWR and RAO was found, i.e., the maximum CWR does not occur for the maximum value of RAO.
Ano: 2019
Número Páginas:
975-992pp.
Autor(es): Brito, M.; Ferreira, R. L.; Teixeira, L; Neves, M. G.; R. Canelas
Revista: Renewable Energy
Editor: Elsevier
Volume:
Volume 151.
Keywords: Power take-off: PTO damping; Response amplitude operator: RAO; Capture width ratio: CWR; Oscillating wave surge converter: OWSC; Wave energy
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Measuring wave run-up, overtopping and damage of rubble-mound breakwaters in scale model tests
A set of scale-model tests was carried out at the wave basin of the Leibniz University Hannover to extend the range of wave steepness values analysed in run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions and on their effects on a gentler slope breakwater
Ano: 2019
Número Páginas:
118-129pp.
Autor(es): Santos, J. A.; Lemos, R.; Weimper, J.; Gronz, O.; Hofland, B.; Sande, J.; Pinheiro, L.; Spans, J.H.; Peña, E.; Reis, M. T. L. G. V.; Fortes, C. J. E. M.; Figuero, A.; Laiño, E.; Bornschein, A.; Kerpen
Editor: Hydralab+
Keywords: Rubble-mound breakwaters; Model tests; Overtopping; Wave run-up
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Numerical analysis of the interference between two elastically mounted cylinders in tandem subject to flows at low Reynolds numbers
Fluid-dynamic interference among cylindrical structures in arrays, frequently used in engineering, is of fundamental and practical interests since it may considerably change fluid-structure interactions and produce large fluctuating forces on structures that cause vibrations, lock-in and important motions. This paper aims to study the mutual interference between two circular cylinders in tandem arrangement, which is considered the simplest configuration of one array cylinders, elastically mounted in transversal direction and subject to a bi-dimensional uniform laminar flow at low Reynolds numbers. Both cylinders have the same diameter D and the center-to-center spacing is equal to L = 5.25D which corresponds to co-shedding regime. The academic numerical model Ifeinco, which is based on the finite element method and uses a partitioned scheme that considers two-way interaction of fluid flow and structure, has been employed to the analysis. Combinations of upstream and downstream stationary and elastically mounted cylinders are investigated for Reynolds number range from 90 to 140. Differences of flow behaviors drag and lift forces and resonance between single cylinder and cylinders in tandem arrangement were found. Mutual and respective influence of upstream cylinder motion on the downstream cylinder and vice-versa are analyzed. Results show that, in some engineering studies, the consideration of the flexibility of cylindrical structures in arrays is fundamental since it influences significantly the interference between cylinders, mainly the magnitude and direction of forces and characteristics of the resonance range, and, consequently, structural and dynamical behaviors.
Ano: 2019
Número Páginas:
11p.
Autor(es): Teixeira, P.; Rechsteiner, P.; Didier, E.
Revista: Journal of the Brazilian Society of Mechanical Sciences and Engineering
Editor: Springer
Volume:
Vol. 41.
Keywords: Finite element method; Vortex-induced vibration; Wake interference; Tandem arrangement; Circular cylinders
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Observação e monitorização de obras marítimas com a nova metodologia OSOM+
This paper describes a programme under the responsibility of the National Laboratory for Civil Engineering (LNEC), Portugal for the systematic observation and monitoring of maritime works, termed OSOM+, which has been applied to an extensive number of maritime structures on the Portuguese mainland coast and abroad. The OSOM+ programme comprises the following four main components for each structure: a) Periodic visual inspections by a trained technician; b) Periodic aerial inspections using a UAV/drone; c) The ANOSOM-GIS database, to store and/or query obtained information, as well as to diagnose present, evolution and risk conditions; and d) A mobile, portable, application, for real-time input and visualization of the ANOSOM-GIS database information.This recently updated methodology encompasses a number of tools whose functionalities are illustrated in this paper with an application to a case study: the Ericeira
Ano: 2019
Número Páginas:
22p.
Autor(es): Fortes, C. J. E. M.; Capitão, R.; Henriques, M. J.; Lemos, R.; Neves, M. G.; Reis, M. T. L. G. V.; Silva, L. G.
Revista: Revista Mundi, Engenharia, Tecnologia e Gestão
Editor: Instituto Federal do Paraná
Volume:
v.4, n.2.
Keywords: Ericeira
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A methodology to determine the optimal size of a wells turbine in an oscillating water column device by using coupled hydro-aerodynamic models
This paper describes a methodology to determine the optimal size of a Wells turbine to be used in an OWC device taking into account hydro-aerodynamic coupling, performance curves of the turbine and air pressure control by a relief valve. The proposed model, named turbine diameter optimization (TDO) model, considers the movement of the water surface inside the OWC chamber as a piston movement in response to the hydrodynamic forces from the incoming waves. The aerodynamic is based on the first law of thermodynamics applied to the air column of the chamber. The power-pressure curve of the turbine and the air pressure control by relief valve are implemented in the model to determine the turbine power output for several regular incident waves. The TDO model is initially calibrated by a numerical model based on Reynolds-Average-Navier-Stokes (RANS) equations for each wave component of an expected sea state distribution. Thereafter, the power output generated by turbines of several sizes is calculated with lower computational cost (few minutes) in comparison with RANS based models (thousands of hours) in a personal computer. This developed methodology is an important support to the process of turbine sizing for an OWC device for an expected sea state distribution.
Ano: 2018
Número Páginas:
9-18pp.
Autor(es): Torres, F.; Teixeira, P.; Didier, E.
Revista: Revista Renewable Energy
Editor: Elsevier
Volume:
Vol. 121.
Keywords: Air pressure control; Turbine sizing; Oscillating water column; Wave energy
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An integrated tool for modelling oscillating water column (OWC) wave energy converters (WEC) in vertical breakwaters
This paper describes the preliminary developments of an innovative integrated tool for the numerical modelling of oscillating water column (OWC) wave energy converters (WEC) integrated in vertical breakwaters. The main purpose of the tool is the numerical modelling of wave propagation from offshore to nearshore, wave-structure interaction, and the complex nonlinear hydrodynamic and aerodynamic phenomena that occur in OWC-WECs.The tool development and validation were supported by experimental data from physical model tests carried out in a wave flume at the Portuguese National Laboratory for Civil Engineering (LNEC). Prototype data were also available for the Pico OWC-WEC in the Azores, Portugal, monitored by the Portuguese Wave Energy Centre since 2005. Application of the tool for sea-wave characterization at the Azores archipelago and calculation of the corresponding wave power for a period of 10 years at various points around each island show that, in winter, there is good availability of wave energy in most quadrants of each island. In summer, the resource exploitation is only worthwhile on the north-west coasts of the islands. Physical and numerical modelling results for an OWC with a fully open chamber show good agreement between experimental data and numerical values for several incident wave conditions. The analysed results include the time series of the free-surface elevation at different locations, the time series of the mean free surface inside the water chamber, the amplification factors, the phase angles and the velocity vectors at the highest and the lowest positions of the mean free surface inside the chamber. The tool showed its potential to be useful in supporting ocean and coastal engineering projects due to its capacity to effectively reproduce the main phenomena involved in these types of studies.
Ano: 2018
Número Páginas:
198
Autor(es): Mendonça, A. C.; Dias, J.; Didier, E.; Fortes, C. J. E. M.; Neves, M. G.; Reis, M. T. L. G. V.; Conde, J. M.; Poseiro, P.; Teixeira, P. R. F.
Revista: Journal of Hydro-environment Research
Editor: Elsevier
Volume:
Vol. 19.
Keywords: Wave power; SWAN-URANS models; Nonlinear numerical modelling; Physical modelling; Wave-structure interaction; Oscillating water column (OWC) wave energy converter (WEC)
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Asymmetric copula
Joint statistical models for long-term wave climate are a key aspect of offshore wind engineering design. However, to find a joint model for sea-state characteristics is often difficult due to the complex nature of the wave climate and the physical constraints of seastates phenomena. The available records of wave heights and periods are often very asymmetric in their nature. This article presents a copula-based approach to obtain the joint cumulative distribution function of the significant wave heights and the up-crossing mean period. This study is based on 124-month hindcast data concerning Horns Rev 3 offshore wind farm. The extra-parametrization technique of symmetric copulas is implemented to account for the asymmetry present in the data. The analysis of the total sea, the wind-sea and primary swell components is performed separately. The results show that the extra-parametrization technique with pairwise copulas consistently provided a better goodness-of-fit when compared to symmetric copulas. Moreover, it is demonstrated that the separation of the total sea into its components does not always improve the extra-parametrized copula
Ano: 2018
Número Páginas:
304-334pp.
Autor(es): Fazeres-Ferradosa, T.; Taveira-Pinto, F.; Vanem, E.; Reis, M. T. L. G. V.; Neves, L.
Revista: Wind Engineering
Editor: Sage
Volume:
Vol. 42, No. 4.
Keywords: Asymmetry; Crámer
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Characterization of ship motions induced by wake waves
This paper analyses the hydrodynamic interaction between two ships, one stationary and the other navigating nearby, using physical and numerical modelling. The passing ship is a self-propelled scale model of the
Ano: 2018
Número Páginas:
547-555pp.
Autor(es): Pedro, F.; Pinheiro, L.; Fortes, C. J. E. M.; Santos, J. A.; Hinostroza , M.
Revista: Progress in Maritime Technology and Engineering
Editor: Taylor & Francis
Keywords: Wake waves; SWAMS; Ship motions
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Comunicações
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Modelação física em zonas portuárias Desenvolvimentos recentes no LNEC
Nesta comunicação, descrevem-se os mais recentes desenvolvimentos no LNEC em termos de instalações experimentais, técnicas de construção, equipamentos e metodologias utilizadas nos ensaios em modelo físico, com a apresentação de casos de estudos realizados para as zonas portuárias de Peniche Ponta Delgada, Leixões
Ano: 2023
Número Páginas:
4p..
Autor(es): Fortes, C. J. E. M.; Lemos, R.; Capitão, R.; Pinheiro, L.; Reis, R.; Silva, L. G.; Costa, C.E.B.C.; Simão, J.; Soares, R. E.; Mendonça, A.C.; HILÁRIO, J.
Editor: PIANC
Keywords: Navios; Pressões; Estabilidade e Galgamentos; Instalações Experimentais; Modelação física
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Neural networks for optimization of an early warning system for moored ships in harbours
Within the BlueSafePort project, an early warning system (EWS) for moored ships in the port of Sines as developed. In order to improve the reliability and accuracy of the system, two neural networks (NN) were trained,using wave buoys measured datasets. Numerical models results for the wave propagation are djusted and forecasts are improved.The trained neural networks were able to produce more accurate stimates for the significant wave height and mean wave period, at the buoy location, deployed in front of the ines Port. The use of the new NN led to an overall reduction of the root mean square error of around 80% compared with SWAN numerical model simulations, thus reducing potential errors in subsequential alculations and alert levels issued by the system for the moored ships.
Ano: 2023
Número Páginas:
12p..
Autor(es): Pinheiro, L.; Gomes, A.; Lopes, N.D.J.; Lopes S.P.F.S.; Prior A.F.M.S.P.; Santos, J. A.; Fortes, C. J. E. M.
Revista: Coastal Engineering
Editor: Dan Cox
Keywords: Wave modeling; Early warning; Moored ships; Neural networks
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New developments in the praia da Vitória bay and harbour early warning system
Within the LIFE Garachico project, an HIDRALERTA EWS is being extended to include methodologies for creating an effective flexible adaptation strategic framework for coastal area of Praia da Vitória. This strategic framework is based on the definition of acceptable risk levels and specific interventions at the local level, allowing to increase the resilience of coastal urban areas against extreme coastal events (both present and future) consequences of climate change.
Ano: 2023
Número Páginas:
106-106pp..
Autor(es): Pinheiro, L.; Zózimo, A. C.; Fortes, C. J. E. M.
Editor: Yildiz Technical University
Keywords: Climate change; Neural networks; Risk; Harbours; Early warning system
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Novo Porto de Dakhla Atlântico. Estudo em modelo físico das pressões induzidas pela agitação marítima em pilares da ponte de acesso ao porto
Esta comunicação descreve os ensaios de pressões efetuados para a caraterização das pressões máximas exercidas nos pilares de secção circular da ponte que liga o porto de Dakhla à costa bem como dos perfis verticais de pressões associadas.
Ano: 2023
Número Páginas:
4p..
Autor(es): Silva, L. G.; Lemos, R.; Fortes, C. J. E. M.; Didier, E.; Costa, C.E.B.C.; Reis, R.; Simão, J.; FONSECA, D.; Mendes, D.; OLIVEIRA PEDRO, J.; CORREA, R.
Editor: PIANC
Keywords: Modèle physique; Piliers; Dakhla
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Projeto C2IMPRESS. Desenvolvimentos iniciais na temática das áreas portuárias
Nesta comunicação são descritos os desenvolvimentos iniciais dos sub-casos do projeto C2IMPRESS referentes aos portos de Aveiro e da Figueira da Foz. A fase inicial envolveu a estimativa preliminar do galgamento induzido pelas ondas em alguns perfis das estruturas dos dois portos, assim como um primeiro inquérito sobre risco aos utilizadores desses dois portos.
Ano: 2023
Número Páginas:
4p..
Autor(es): Zózimo, A. C.; Pinheiro, L.; Craveiro, J.; Fortes, C. J. E. M.; KLEINJAN, M.; VENTURA, S.; CRUZ, M.M.
Editor: PIANC
Keywords: Parceria Pública-Privada-Civil; Galgamento; C2IMPRESS
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Prolongamento do molhe leste do porto de Sines. Ensaios em modelo físico
Esta comunicação descreve os estudos em modelo reduzido tridimensional de estabilidade hidráulica e de galgamentos para o prolongamento do molhe leste correspondente à 3ª Fase de Expansão do Terminal XXI, do Porto de Sines.
Ano: 2023
Número Páginas:
4p..
Autor(es): Soares, R. E.; Lemos, R.; Fortes, C. J. E. M.; Silva, L. G.; Costa, C.E.B.C.; Reis, R.; Simão, J.; Luis, L.; Aparício, L.
Editor: PIANC
Keywords: Modelo físico; Quebra-mar; Sines
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Simulação das condições de segurança e acessibilidade de navios nos portos de Sines e Aveiro
Neste trabalho apresenta-se uma metodologia para determinar as condições de segurança e acessibilidade de navios ao longo do trajeto de acesso ao porto, ilustrando-se a sua aplicação nos casos de estudo dos portos de Sines. este trabalho insere-se no âmbito do desenvolvimento de novos sistemas de previsão e alerta para a navegação nos portos de Sines e Aveiro.
Ano: 2023
Número Páginas:
4p..
Autor(es): Pinheiro, L.; Gomes, A.; KLEINJAN, M.; Zózimo, A. C.; Mendonça, A.C.; Fortes, C. J. E. M.
Editor: PIANC
Keywords: Navios; Modelação numérica; Portos; Segurança; Navegação
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Técnicas de vídeo na análise do espraiamento e extensão do galgamento em estruturas de proteção costeira
O litoral português apresenta um valor natural, económico e cultural único e de importância amplamente reconhecida. O dinamismo costeiro pode levar à ocorrência de galgamentos de estruturas de proteção costeira em situações de temporal, que podem causar inúmeros danos, podendo mesmo resultar na perda de vidas humanas ou na destruição de estruturas próximas da linha de costa. Deste modo, a gestão das zonas costeiras próximas de aglomerados populacionais deve considerar a implementação de medidas sustentáveis que mitiguem os fenómenos que afetam o litoral de forma mais gravosa, de que são exemplo a implementação de estruturas de proteção costeira.
Ano: 2023
Número Páginas:
309-310pp..
Autor(es): Mendonça, A.C.; Lemos, R.; Fortes, C. J. E. M.; MARTINS, R.; Ferrão, R.
Editor: APRH
Keywords: Fotogrametria; Ensaios físicos 2D; Defesa longitudinal aderente
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Uso de redes neuronais para melhoria das previsões de um sistema de alerta para riscos em portos
No âmbito do projeto BlueSafePort está a ser desenvolvido um sistema para prever e alertar situações de emergência causadas pela agitação marítima, relacionadas com a navegação em portos, bem como constrangimentos operacionais. A paralisação dos terminais portuários leva a grandes perdas económicas e afeta em grande parte a competitividade geral do porto. Assim, o objetivo deste sistema é reduzir a vulnerabilidade do porto aumentando a sua capacidade de planeamento e resposta e
Ano: 2023
Número Páginas:
279-281pp..
Autor(es): Pinheiro, L.; Morgado, N.; Gomes, A.; Lopes S.P.F.S.; Lopes, N.D.J.; Prior A.F.M.S.P.; Fortes, C. J. E. M.
Editor: APRH
Keywords: Navegação; Riscos em portos; Redes neuronais; Previsão de agitação marítima
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Wave runup and overtopping assessment by using video methodologies in physical models
Physical modelling is one of the tools to help characterize wave runup and overtopping in maritime structures. Usually, the determination of wave runup is made by using resistive wave gauges along the breakwater slope while the evaluation of overtopping volumes (individual or total) is made by weighing the water overtopped with a scale that is collected in a reservoir installed on this scale.Nowadays, non-intrusive methodologies for the assessment of those parameters are being used, due to their simplicity and low cost. Video cameras, constitute a good alternative to old methods; however, their performance depends essentially on the post-processing methodologies used.The present paper presents the application of the Timestack methodology done so far, in the evaluation of: wave runup in 2D and 3D physical tests. The video-derived statistical parameters of wave runup (Rumax, Rumin, Rumed e Ru2%) are compared with the corresponded ones obtained with resistive wave gauges. The total water volume and the average overtopping flow rate from video data is compared with the one collected by a reservoir. Those cases will illustrate the advantages and drawbacks associated with Timestack methodology.
Ano: 2023
Número Páginas:
71-71pp..
Autor(es): Lemos, R.; Fortes, C. J. E. M.; Mendonça, A.C.; Andriolo, U.
Editor: Yildiz Technical University
Keywords: Overtopping; Runup; Timestack
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Capítulos de Livros
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Multi-functional artificial reefs for coastal protection
N/A
Ano: 2009
Número Páginas:
153-210 pp.
Autor(es): Voorde, M.; Antunes do Carmo, J.; Neves, M. G.
Editor: Ch. A. Hudspeth, T. E. Reeve
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Teses de Doutoramento
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Trapped-mode propagation along irregular coasts
N/A
Ano: 1999
Número Páginas:
159 p.
Autor(es): Santos, J. A.
Editor: ******
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Probabilistic Assessment of the Safety of Coastal Structures
N/A
Ano: 1998
Número Páginas:
594 p.
Autor(es): Reis, M. T.
Editor: ******
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Unsteady Nearshore Currents on Longshore Varying Topographies
N/A
Ano: 1998
Número Páginas:
346 p.
Autor(es): Sancho, F. E.
Editor: ******
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Simulação da agitação irregular. Técnicas matemáticas
N/A
Ano: 1973
Autor(es): Carvalho, M. M.
Editor: ******
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Relatórios
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Demonstration and technical tours plan
A major objective of TRA LISBON 2022 Conference is to boost research and innovation capacity for the transport sector, throughout a full innovation cycle, from idea to market. Having this in view, the project
Ano: 2022
Autor(es): Batista, F. A.; Marecos, V.; Antunes, M. L.; Macedo, A. L.; Freire, A. C.; Capitão, R.; Arsénio, E.; Maia, L.
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Demonstration submission and selection guidelines
The demonstration area will be one of the main focus points of TRA LISBON 2022, presenting multifunctional spaces and being prepared to receive a large number of different types of on-site demonstrations (indoor and outdoor). On-line demonstrations will also be an option, allowing for the widest possible coverage of access for all the participants.The dedicated areas will allow for interactive demonstrations of technological innovations to be carried out by and for industry partners, researchers, and other stakeholders. Demonstrations are an excellent opportunity to introduce conference attendees in an engaging way, as well as to promote new contacts and promising business.
Ano: 2022
Autor(es): Freire, A. C.; Arsénio, E.; Macedo, A. L.; Antunes, M. L.; Capitão, R.; Belinha, M.
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Technical tours organization criteria and procedures report
According to the CSA project plan, WP5.2 task objective is to organize technical tours that feature attractive and interactive showcases aiming at engaging participants into novel technologies for all transport modes and enabling stakeholders and their companies to disseminate and even sell their products and applications to all interested parties.
Ano: 2022
Autor(es): Capitão, R.; Macedo, A. L.; Arsénio, E.; Antunes, M. L.; Freire, A. C.
Editor: TRA LISBON 2022
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Data Repository Rules. Deliverable 10.4
This report is part of HYDRALAB+ Work Package 10, which seeks to strengthen the coherence of experimental hydraulic and hydrodynamic research undertaken by the HYDRALAB+ partner organisations. It outlines the work carried out by Samui Design & Management Ltd, supported by HR Wallingford, in relation to the development of a data repository structure that can be adopted by participants of the HYDRALAB+ project.
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data from physical modeling; Zenodo; Data repository structure
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Data Storage Report. RECIPE Task 8.2: Overtopping events in breakwaters under climate change scenarios
Reliable prediction of wave run-up/overtopping and structure damage is a key task in the design and safety assessment of coastal and harbor structures. Run-up/overtopping and damage must be below acceptable limits, both in extreme and in normal operating conditions, to guarantee the stability of the structure and the safety of people and assets on and behind the structure. The mean-sea-level rise caused by climate change and its effects on wave climate may increase the number and intensity of run-up/overtopping events and make the existing coastal/harbor structures more vulnerable to damage.Accurate estimates, through physical modelling, of the statistics of overtopping waves for a set of climate change conditions, are needed. The research project HYDRALAB+ (H2020-INFRAIA-2014-2015) gathers an advanced network of environmental hydraulic institutes in Europe, which provides access to a suite of environmental hydraulic facilities. They play a vital role in the development of climate change adaptation strategies, by allowing the direct testing of adaptation measures and by providing data for numerical model calibration and validation. The use of physical (scale) models allows the simulation of extreme events as they are now, and as they are projected to be under different climate change scenarios.The enclosed dataset refers to the experimental work developed at LNEC within HYDRALAB+ and considers 2D damage and overtopping tests for a rock armor slope, with four different approaches to represent storms. Data of free surface elevation, overtopping and damage is presented.
Ano: 2018
Autor(es): Fortes, C. J. E. M.; Mendonça, A. C.; Lemos, R.; Neves, M. G.; Reis, M. T. L. G. V.; Capitão, R.
Keywords: Climate change; Overtopping; Data repository
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Facilitating the re-use and exchange of experimental data. Task 10.1 Critical review. D10.2 Critical Review of data flux between laboratory models, numerical models and field case studies
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.2 of the HYDRALAB+ project, entitled
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Field data; Numerical modeling data; Physical modeling data; Data flux
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Facilitating the re-use and exchange of experimental data. Task 10.2 Data Standards and Licenses. D 10.3 Data Standards Report
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.3 of the HYDRALAB+ project, entitled
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data management options; Experimental data; Data formats
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Protocols for representing variability and unsteadiness in flume facilities. Deliverable Number 8.2
This deliverable is related to task 8.2
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Lemos, R.; Capitão, R.; Neves, M. G.; Reis, M. T. L. G. V.
Keywords: Extreme events; Climate change; Variability in flume facilities
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Sistema de previsão, alerta e gestão de riscos causados pela agitação marítima - Relatório inicial Arquitetura e características gerais do sistema para os portos de Madalena do Pico, São Roque do Pi
Neste relatório inicial são apresentadas a arquitetura e as caraterísticas gerais dos protótipos do sistema de previsão, alerta e gestão de riscos causados pela agitação marítima para os portos de Madalena do Pico, São Roque do Pico e Praia da Vitória. Os três protótipos em desenvolvimento têm por base uma arquitetura semelhante, com características distintas, nomeadamente no que respeita à localização dos dados de base, às malhas computacionais utilizadas e às características físicas das fronteiras, tanto no plano horizontal (interface terra-mar), como no vertical (batimetria dos fundos). Caracteriza-se o layout geral dos portos, bem como a sua morfologia e operabilidade.
Ano: 2018
Autor(es): Pinheiro, L.; Fortes, C. J. E. M.; Reis, M. T.; Poseiro, P.
Keywords: Porto de Praia da Vitória; Porto de São Roque do Pico; Porto de Madalena do Pico; Agitação marítima; Alerta e gestão de riscos; Sistema de previsão
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ANÁLISE TEMPORAL DE REGISTOS DA ELEVAÇÃO DA SUPERFÍCIE LIVRE E DE VELOCIDADE EM ENSAIOS EXPERIMENTAIS
N/A
Ano: 2014
Número Páginas:
107p.
Autor(es): Ramos, A.; Gabriel. S.; Simão, J.; Passarinho, A.; Lemos, R.; Fortes, C. J. E. M.
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Outros
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Avaliação da Estabilidade do Quebra-Mar Destacado do Porto Inglês (Ilha do Maio
Realização de ensaios em modelo físico reduzido 3D para a avaliação da estabilidade do quebra-mar destacado do Porto Inlgês, Maio, Cabo-Verde
Ano: 2023
Autor(es): Soares, R. E.; Fortes, C. J. E. M.; Lemos, R.; Costa, C.E.B.C.; Silva, L. G.; Pinheiro, L.; Neves, M. G.
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Physical modelling of wave-induced plant drag coefficient
N/A
Ano: 2019
Autor(es): Reis, R.; Suzuki , T.; LUBBERS, B.; Fortes, C. J. E. M.; Pires Silva, A.
Keywords: Flume experiments; Wave propagation; Plant flexibility; Vegetation
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Evaluation of wave overtopping consequences for risk assessment using ANP methodology
Adverse sea conditions can cause emergency situations associated to wave overtopping, which endanger the safety of people and goods, with negative impacts for society, the economy and the environment. Therefore, a methodology to assess the overtopping risk in port and coastal areas is essential for a proper planning and management of these areas.The Portuguese National Laboratory for Civil Engineering (LNEC) has been developing the HIDRALERTA system, an integrated decision-support tool for port and coastal management, which focus in preventing and supporting the management of emergency situations and the long-term planning of interventions in the study areas. It enables the user to calculate the risk for various port and coastal activities, starting with the characterization of sea-waves, wind field and tide levels at the study regions.HIDRALERTA was already tested at different places in Portugal: Costa da Caparica beach, in Almada, and port of Praia da Vitória, in the Azores. However, in both cases, the evaluation of wave overtopping / flooding consequences was carried out using a quite simple approach. In fact, such consequences were assessed only at a global and qualitative level, based on information provided by the responsible authorities.This paper aims at testing a quantitative methodology to evaluate overtopping consequences: the Analytic Network Process (ANP). This methodology was proposed to solve complex decision-making problems and its objective is to calculate the priorities among decision elements which will define their final weights on the consequences. The ANP approach can produce interdependencies between criteria and compute the respective weight of each criterion. Such a network model with dependence and feedback improves the priorities derived from judgements and makes prediction more accurate. So, the ANP allows comparison among clusters of elements. Furthermore, in this methodology we take into account the impacts of alternatives on the importance of criteria, by normalizing the comparison matrix. Thus, the given alternatives can influence the ranking of criteria.Application of the ANP methodology to the case study of Praia da Vitória port is presented and a consequences level map is obtained.
Ano: 2016
Autor(es): Lourenço, I.; Santos, J. A.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Poseiro, P.; Craveiro, J.
Keywords: Praia da Vitória port; Analytic Network Process (ANP); Risk; Wave overtopping
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Sistema de alerta para a navegação em portos
Apresenta-se um novo sistema de alerta para navios amarrados em portos que se encontra em desenvolvimento no Laboratório Nacional de Engenharia Civil. O sistema SWAMS_ALERTA é um sistema de previsão e alerta baseado na avaliação do risco associado ao comportamento de navios amarrados em zonas portuárias.Os riscos associados a navios amarrados decorrem de movimentos excessivos, quer no plano horizontal, quer no plano vertical. Estes movimentos podem condicionar as atividades portuárias, nomeadamente cargas e descargas, mas em casos extremos podem levar à ocorrência de situações de emergência, tais como rotura de cabos, rotura de cabeços de amarração ou até colisões com o cais. As consequências deste tipo de situações envolvem sempre grandes prejuízos materiais e por vezes humanos.O sistema SWAMS_ALERTA utiliza as medições e previsões de agitação marítima para a determinação dos seus efeitos em termos de movimentos nos seis graus de liberdade e forças nas amarras e defensas quando o navio se encontra estacionado no cais. Para tal, o sistema recorre a uma série de modelos numéricos, interligados entre si. A comparação destes valores com valores máximos admissíveis pré-estabelecidos permite a avaliação, em tempo real, de situações de emergência e a emissão de alertas dirigidos às entidades portuárias.O sistema é constituído por 4 módulos:I
Ano: 2016
Autor(es): Pinheiro, L.; Lopes, P.; Fortes, C. J. E. M.; Santos, J. A.
Keywords: Navios amarrados; Riscos; Sistema de previsão e alerta
CONSTRUÇÃO DA EXPANSÃO DO PORTO DE SAL-REI 1ª FASE (ILHA DA BOAVISTA CABO VERDE) Ensaios bidimensionais em modelo reduzido Parecer Técnico
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Definição da Geometria para um Recife Artificial Multifuncional em Leirosa (Poster)
N/A
Ano: 2010
Número Páginas:
1.
Autor(es): Neves, M. G.; Antunes do Carmo, J.
Editor: Gestão Costeira: Vulnerabilidades e Riscos na Região Centro
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Probabilistic Assessment of Hazards from Overtopping of Seawalls in Urban Environments: Annual Report of pOST-dOCTORAL rESEARCH
N/A
Ano: 2005
Autor(es): Reis, M. T. L. G. V.
Editor: ******
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Guidelines and Recommendations for River Information Services - PIANC
N/A
Ano: 2004
Autor(es): J.A Covas
Editor: ******
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Porto Santo Island. Wave Characterization and propagation. poster apresentado ao International Coastal Symposium (ICS 04)
N/A
Ano: 2004
Autor(es): Fortes, C. J. E. M.
Editor: ******
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Probabilistic Assessment of Hazards from Overtopping of Seawalls in Urban Environments: Annual report of Post-Doctoral Research.
N/A
Ano: 2004
Autor(es): Reis, M. T. L. G. V.
Editor: ******
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