Papers
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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) is being developed for forecasting and alerting emergency situations related to ship navigation in ports, as well as operational constraints. Port terminals downtime leads to large economic losses and largely affects the port
Year: 2022
Author(s): Pinheiro, L.; Gomes, A.; Santos, J. A.; Fortes, C. J. E. M.; Morgado, N.; Guedes Soares, C.
Editor: ICCE2022
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New Hidralerta Prototypes: Peniche, Faro And Quarteira
Early Warning Systems are crucial disaster-risk-reduction strategies as they allow local authorities to prepare and implement in advance the necessary measures to avoid major destruction and risk for individuals and properties caused by storm events. HIDRALERTA is a forecast, early warning and risk assessment system for port and coastal areas that usesforecasts of sea-waves and water levels to evaluate overtopping/flooding events and risks associated with mooring of ships.
Year: 2022
Author(s): Zózimo, A. C.; Pinheiro, L.; Manz, A.; Garzon, J.L.; Fortes, C. J. E. M.; Ferreira, Ó.; Houdeau, G.
Editor: Formato Virtual
Keywords: Overwash; Overtopping; HIDRALERTA; Early Warning Systems
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Numerical and Physical Modeling of Ship Impacts on Fenders
This paper aims to evaluate the impact of ships on fenders during the berthing process. Physical tests and numerical simulations with MOORNAV tool were performed with versions of the GulfStream ship in still water and under a set of different conditions. A comparative analysis was made between outputs of the two models considering specific conditions. The MOORNAV application resulted in a standard deviation from the physical model of 3% to 6% in relation to the maximum force exerted on each fender.
Year: 2022
Author(s): Gomes, A.; Pinheiro, L.; Simão, J.; Costa, C.E.B.C.; Fortes, C. J. E. M.; Santos, J. A.
Editor: IOS Press, 2022
Keywords: MOORNAV; Physical Modelling,; Numerical Modelling; GulfStream Ship; Fenders
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Numerical evaluation of optimal sizes of wells turbine and chamber of a cluster of oscillating water columns integrated into a breakwater on the southern Brazilian coast
This paper describes a numerical evaluation of optimal sizes of a Wells turbine and chamber cross section to be used in a cluster of an oscillating water column (OWC) wave energy converter device. The FLUENT numerical model, based on the Reynolds
Year: 2022
Author(s): Wiener G.F.; Teixeira, P.; Didier, E.
: Journal of Waterway, Port, Coastal, and Ocean Engineering
Editor: ASCE
Volume:
Vol. 148, Issue 4.
Keywords: Generalized
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Numerical Evaluation of Optimal Sizes of Wells Turbine and Chamber of a Cluster of Oscillating Water Columns Integrated into a Breakwater on the Southern Brazilian Coast
This paper describes a numerical evaluation of optimal sizes of a Wells turbine and chamber cross section to be used in a cluster of an oscillating water column (OWC) wave energy converter device. The FLUENT numerical model, based on the Reynolds
Year: 2022
Author(s): Wiener G.F.; Teixeira, P.; Didier, E.
Editor: ASCE
Keywords: Generalized
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Numerical Modelling of the Hydrodynamic Response of a Fixed Dual-Chamber Oscillating Water Column Wave Energy Converter Through the Meshless DualS Hysics Method
A numerical model of a dual-chamber Oscillating Water Columns (OWC)Wave Energy Converter (WEC) is built through the DualSPHysics software. Thiscode is based on the Smoothed Particle Hydrodynamics (SPH) model, a Lagrangianmeshless method where particles represent the flow, interact with structures, andexhibit large deformation with moving boundaries. A one phase approach
Year: 2022
Author(s): Anastas, G.; Santos, J. A.; Fortes, C. J. E. M.
Editor: E. Rizzuto and V. Ruggiero (Eds.)
Keywords: PTO; meshless method; DualSPHysics; Dual-chamber OWC
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OSOM+: Aplicação às estruturas marítimo-portuárias do Porto de Sines
Neste trabalho, descreve-se a aplicação do programa OSOM+ às obras marítimas do Porto de Sines, em especial ao quebra-mar oeste. Assim, serão apresentados resultados de comparação entre as situações observadas em 2018 e 2020 no âmbito de inspeções visuais e com drone, mediante apreciação e análise de fotografias georreferenciadas, ortomosaicos, nuvens de pontos, modelos numéricos de superfície e perfis selecionados. É também ilustrada a forma como a aplicação e base de dados ANOSOM-WEB pode ser empregue quer durante as campanhas de observação, quer em gabinete. Conclui-se este trabalho com a apresentação das vantagens da recente atualização da metodologia e do que se julga ser a sua importância na tomada de decisões sobre a necessidade ou não de realizar obras de manutenção e/ou reparação nestas estruturas, ou similares
Year: 2022
Author(s): Capitão, R.; Fortes, C. J. E. M.; Lemos, R.; Silva, L. G.; Neves, M. G.; Henriques, M.; Martins, T.
Editor: PIANC
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Physical and Numerical Modeling Study of a Submerged Detached Breakwater at Praia da Vagueira, Portugal: Surfing Conditions
The National Laboratory of Civil Engineering (Portugal) is undertaking a characterization and feasibility study of a multifunctional submerged detached breakwater (SDB) in front of Praia da Vagueira, in the central West coast of Portugal, for the Portuguese Environment Agency, I.P. (APA). It is intended that the SDB is multifunctional, contributing to create conditions to promote surfing waves, boosting the economy associated with this activity in the area. A physical and numerical modeling study was developed to investigate the influence of a SDB (considering the SDB parallel to the coastline, SDB 0º, and the SDB with a 45º angle to the coastline, SDB 45º) in the surfing conditions on the study area. The results show that: without structure, a spilling wave breaker occurs near the coastline, with peel angles adequate for beginners; for the SDB 0º a plunging wave breaks along the structure, with small peel angles, not adequate for surfing; and for the SDB 45º a plunging wave breaks over and past the structure, with peel angles between 40º-50º, promoting surfing conditions for intermediate and professional surfers.
Year: 2022
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Martinez, C.; Reis, R.; Costa, C.E.B.C.; Simão, J.; Bicudo, P.; Sancho, F. E.; Oliveira , F.
Editor: IAHR2022 Abstract Book
Keywords: Aveiro; Multifunctional structure; COULWAVE; 3D experiments
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PRAIA DA COVA-GALA: MODELAÇÃO NUMÉRICA DAS TEMPESTADES DE FEVEREIRO DE 2019 COM O MODELO XBEACH
A previsão de galgamentos e inundações em zonas costeiras baseadas em metodologias numéricas, é fundamental para a garantia da segurança de pessoas e bens e para a gestão integrada da zona costeira.
Year: 2022
Author(s): Simão, J.; Bortoli, A.; Fortes, C. J. E. M.; Zózimo, A. C.; Reis, M. T. L. G. V.; Nahon, A.
Editor: MEC
Keywords: riscos costeiros; espraiamento; galgamento; XBeach
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PROJETO BSAFE4SEA - CONTROLO DA SEGURANÇA DE QUEBRA MARES ATRAVÉS DA ANÁLISE DE UM SISTEMA DE PREVISÃO E APOIO À DECISÃO - METODOLOGIA E RESULTADOS
Neste trabalho apresenta-se o projeto BSafe4Sea - Controlo da Segurança de Quebra-mares através da Análise de um Sistema de Previsão e Apoio à Decisão, que tem como objetivos o desenvolvimento, a aplicação e o teste de metodologias de previsão do comportamento estrutural de quebra-mares de talude. Estas metodologias formarão a base de um sistema inovador de apoio à decisão para o planeamento e priorização de trabalhos de manutenção e reparação, aumentando, assim, a segurança, funcionalidade e resiliência destes quebra-mares. Apresentam-se as atividades do projeto
Year: 2022
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Santos, J. A.; Capitão, R.; Pinheiro, L.; Lemos, R.; Andriolo, U.; Soares, F.; Henriques, M.; Reis, M. T. L. G. V.
Editor: INEGI/FEUP
Keywords: apoio à decisão; previsão; dano; quebra-mares de talude; BSafe4Sea
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Comunicação
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Numerical analysis of the influence of chamber sizes and turbine characteristics on an oscillating water column wave energy converter
Nowadays, renewable energy is a topic widely discussed in scientific community. Specifically wave energy attracts attention because it has a high energy potential distributed throughout the planet. Oscillating Water Column (OWC) wave energy converter is one of the most studied devices that have promising perspectives to be installed commercially. This study aims investigating the influence of chamber sizes and turbine characteristics dimensions of an OWC device located at the southern Brazilian coast is carried out. Numerical simulations for incident waves with period T = 7 s and 10 s and height H = 1.5 m, by using the FLUENT® model, based on the finite volume method (VFM) are carried out. Efficiencies for different chamber sizes and Wells turbine characteristic relations (kt) in each incident wave are determined. The highest efficiencies were obtained by a chamber with 5 x 5 m and kt = 530 Pa.s/m³ in the case of an incident wave with T = 7s (52%), and 30 x 30 m and kt = 15 Pa.s/m³ at T = 10s (65%).
Year: 2020
Number Pages:
9p.
Author(s): Wiener G.F.; Teixeira, P. R. F.; Didier, E.
Editor: ABCM - Brazilian Society of Mechanical Sciences and Engineering
Keywords: Pneumatic energy; Oscillating water column; Wave energy converter
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Risk forecast system for moored ships
Port terminals downtimes lead to large economic losses and largely affect the port
Year: 2020
Author(s): Pinheiro, L.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Santos, J. A.; Guedes Soares, C.
: Proceedings of virtual Conference on Coastal Engineering, 2020
Editor: University of Southern California, USA
Volume:
No 36v (2020).
Keywords: Azores; Ports; Waves; Moored ships; Forecast system
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Scale model tests of a moored tanker at leixões port with breakwater´s extension
This paper describes the physical model, experimental setup and tests performed to study the motions and forces of a ship moored to the pier A at the Leixões oil terminal, following the breakwater
Year: 2020
Author(s): Pinheiro, L.; Abdelwahab, H.S.; Santos, J. A.; Fortes, C. J. E. M.; Guedes Soares, C.
: Proceedings of virtual Conference on Coastal Engineering, 2020
Editor: University of Southern California, USA
Volume:
No 36v (2020).
Keywords: Experimental tests; Leixões; Physical scale model; Ports; Waves; Moored ships
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Simulation of hurricane Lorenzo at the port of Lajes das Flores, Azores, by using the HIDRALERTA system
HIDRALERTA is a forecast, early warning and risk assessment system for port and coastal areas that uses measurements and estimates of sea-waves and water levels to evaluate overtopping/flooding events. The calculation of the mean overtopping discharge over a maritime structure is performed through artificial neural network-based tools and/or empirical formulae. The system is developed in open source software, mainly using the Python language. This paper presents the application of HIDRALERTA system to reproduce the hurricane Lorenzo conditions and impacts at Lajes das Flores port on October 2nd 2019, the most affected port in Azores. This hurricane was regarded as the strongest storm to hit Azores in 20 years. The system predicted the expected results for the hurricane wave characteristics, as well as overtopping discharge volumes. Further validation still need to be improved with the collaboration of the local authorities and the use of historical data.
Year: 2020
Number Pages:
376-379pp.
Author(s): SANTOS, M.I.; Reis, M. T. L. G. V.; Pinheiro, L.; Fortes, C. J. E. M.; Zózimo, A. C.; Serrazina, V.; SALVADOR, M.; Azevedo, E. B.; Reis, F.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: Warning system; Overtopping; Lorenzo; Lajes das Flores; Hidralerta
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Testing storm impact modelling at São Pedro de Moel beach
Numerical models are useful tools to predict the effects of storms in coastal areas. The objective of this work was to simulate the effects of storms in São Pedro de Moel beach by using XBeach. The nearshore sea state was obtained by propagating offshore conditions using the SWAN model. The XBeach model was divided into two setups to analyse overtopping events and coastal evolution. Sensibility tests, calibration, and validation, using information from different storms, were performed for the different setups. The results from the overtopping simulation were compared against results from an empirical formula. The comparison showed lower values obtained with the empirical formula. The coastal evolution run point out to the necessity of having better field data before and after storms to improve the model setting and accuracy.
Year: 2020
Number Pages:
97-100pp.
Author(s): Cabrita, P.; Ferreira, A. M.; Fortes, C. J. E. M.; Ferreira, Ó.; Freire, P.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: XBeach; Overtopping; Empirical formula; Coastal storms; Coastal evolution
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Three-dimensional survey in scale model tests of rubble-mound breakwaters. Laser scanning and time of flight methodologies
The assessment of damage evolution in scale model tests of rubble-mound breakwaters can be achieved by comparing eroded depths and volumes between consecutive surveys. This paper focuses on damage evolution of a model of a rubble-mound breakwater and on the novelty of the non-intrusive survey methodologies such as laser scanning and Time of Flight (ToF) techniques, based on point clouds, enabling the extraction of profiles and the calculation of eroded depths and eroded volumes. The final objective of this work is to evaluate the applicability of the estimation the number of displaced armour units, using a non-dimensional damage parameter based on the calculated eroded volume.The paper will also describe the experiments conducted under the RODBreak, a project sponsored by the HYDRALAB+ Transnational Access Program, in which a stretch of a rubble-mound breakwater was built at the wave-current basin of the Leibniz University Hannover (LUH) to assess the structure behavior. Four scan surveys were conducted using a Faro Focus 3D laser scan, as well as a ToF sensor. Those surveys were carried out before and after two test series, in order to evaluate the eroded volume and profile evolution.
Year: 2020
Number Pages:
388-391pp.
Author(s): Lemos, R.; Santos, J. A.; Fortes, C. J. E. M.; Kerpen, N.B.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: Stability; Measuring techniques; Breakwater; 3D surveying
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Validação do protótipo do sistema To-SEAlert para o porto da Ericeira. Depressões Elsa e Fabien
Neste trabalho é efetuada a validação do protótipo To-SEAlert para o porto da Ericeira. Para a validação dos resultados do modelo SWAN foram utilizados os dados de duas boias situadas ao largo da Nazaré e para a validação das previsões do sistema de cálculo do grau de risco foram simuladas as depressões Elsa e Fabien (ocorridas em dezembro de 2019) e que foram responsáveis por fortes danos na cabeça do molhe do porto da Ericeira. Verificou-se uma boa concordância entre os dados das boias e os resultados do modelo SWAN, tendo no entanto o modelo reproduzido melhor a direção média e a altura significativa do que o período de pico. Relativamente aos valores de galgamento, os resultados obtidos na simulação das depressões Elsa e Fabien estiveram em concordância com os valores referidos na literatura como causadores de danos nas estruturas.
Year: 2020
Number Pages:
183-186pp.
Author(s): Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: To-SEAlert; Galgamentos; Depressão Faien; Depressão Elsa; Alerta
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Wave energy assessment in Portugal potential locations for OWC installation
This work aims to determine the exploitable wave energy resource at six potential sites, located in the Azores, Madeira and Sines breakwater city harbours. For that purpose, the thirdgeneration wave model SWAN is used to estimate the sea-wave conditions over the last 40 years. Boundary conditions of the sea states and wind fields are provided by the climate reanalysis datasets (ERA5). Using those results as inputs to the SWAN model, the sea-states were propagated shoreward, in order to estimate and analyse the wave climate conditions in the regions of interest. By combining the average energy flux per unit-length of wave front and the probability of occurrence of each sea state, the average exploitable annual energy per unit length of wave crest can be computed. The variability of this energy flux is described, since it is of fundamental importance for the efficiency of the Wave Energy Converters (WEC).
Year: 2020
Number Pages:
396-399pp.
Author(s): Anastas, G.; Pinheiro, L.; Fortes, C. J. E. M.; Santos, J. A.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: Exploitable energy; SWAN; Oscillating water column; Wave energy converter
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Wave run-up and overtopping in rubble-mound breakwaters under oblique wave incidence
Former investigations on wave run-up and overtopping of (impermeable and permeable) coastal structures aimed at quantifying the influence of oblique waves on mean overtopping discharge, water layer thickness and velocities by developing empirical formulas of a reduction factor for wave obliquity,
Year: 2020
Author(s): Reis, M. T. L. G. V.; Santos, J. A.; Fortes, C. J. E. M.; Lemos, R.; Carvalho, R.; Pohl, R.; BJORNSCHEIN, A.
Editor: University of Southern California, USA
Volume:
No 36v (2020).
Keywords: Rubble mond breakwaters; Overtopping; Wave runup
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Analysis of the incident sea-waves and of the consequent run-up in the RODBreak experiment
In 2017, the RODBreak experiment was conducted. The experiment aimed at characterizing wave run-up, overtopping and damage in rubble-mound breakwaters. The reason for these experiments was the huge impact that climate can have on maritime structures, particularly in rubble mound breakwaters. In fact, the forecast sea level rise associated with more frequent and severe storms will have consequences either on the increase of wave runup, wave overtopping or on damage on existent structures since they were not design for those extreme values. However, for those climate change scenarios, little is known about the actual failure probability of such structures.Within this framework, a stretch of a rubble-mound breakwater was built in a wave basin. Under extreme wave conditions, with different incident wave angles (from 40° to 90°), a total of 49 tests were performed. Each test had different testing parameters, such as significant wave height (Hs), peak period (Tp) and wave direction. Also, for each test, different types of measurements were considered. Incident sea waves were measured with 3 arrays of 6 acoustic wave probes each as well as with isolated acoustic wave probes and 5 Acoustic Doppler Velocimeters (ADV
Year: 2019
Number Pages:
152-157pp.
Author(s): Spans, J.H.; Santos, J. A.; Fortes, C. J. E. M.; Pinheiro, L.
Editor: EdiBios
Keywords: Run-up; RODBreak
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Capítulo de Livro
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Multi-functional artificial reefs for coastal protection
N/A
Year: 2009
Number Pages:
153-210 pp.
Author(s): Voorde, M.; Antunes do Carmo, J.; Neves, M. G.
Editor: Ch. A. Hudspeth, T. E. Reeve
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Tese de Doutoramento
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Trapped-mode propagation along irregular coasts
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Year: 1999
Number Pages:
159 p.
Author(s): Santos, J. A.
Editor: ******
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Probabilistic Assessment of the Safety of Coastal Structures
N/A
Year: 1998
Number Pages:
594 p.
Author(s): Reis, M. T.
Editor: ******
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Unsteady Nearshore Currents on Longshore Varying Topographies
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Year: 1998
Number Pages:
346 p.
Author(s): Sancho, F. E.
Editor: ******
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Simulação da agitação irregular. Técnicas matemáticas
N/A
Year: 1973
Author(s): Carvalho, M. M.
Editor: ******
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Relatório Científico
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Methodologies for water resources policy analysis. Metodologias para a avaliação de políticas de recursos hídricos. Nato Po-waters
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Year: 1984
Author(s): Santos, M. A.; Bau, J.; Castanho, J.
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Obras portuárias nas Ilhas do Fogo e da Brava (República de Cabo Verde).
N/A
Year: 1984
Author(s): Vera-Cruz, D.
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On the behaviour of moored ships in harbours - theory, practice and model tests
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Year: 1984
Author(s): RITA, M. M.
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Central térmica de Sines. Esporões de rejeição de água de refrigeração. Ensaios de estabilidade em Tanque
N/A
Year: 1983
Author(s): Vera-Cruz, D.
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Ensaios de estabilidade da cabeça do molhe-cais do porto da Praia (Graciosa). Variante.
N/A
Year: 1983
Author(s): Figueira, P.
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Ensaios em modelo reduzido do troço NATO do molhe de Ponta Delgada. Ensaios bidimensionais.
N/A
Year: 1983
Author(s): Silva, L. G.
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Estudo em modelo reduzido da agitação no porto da Ilha de Porto Santo.
N/A
Year: 1983
Author(s): Figueira, P.
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Hydraulic tests of Sines west breakwater. Additional tests of emergency repair. Stability and overtopping.
N/A
Year: 1983
Author(s): Matos, J. M. S. G.; Pita, C. A.
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Hydraulic tests of Sines west breakwater. Stability and overtopping of final repair
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Year: 1983
Author(s): Matos, J. M. S. G.; Pita, C. A.
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Porto da Póvoa de Varzim. Ensaios de galgamentos do molhe norte
N/A
Year: 1983
Author(s): Matos, J. M. S. G.
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Outro
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Relato da missão a Bruxelas (28 a 30 de Outubro de 1998) para participação na 10ª Reunião da Acção Concertada Added Value Services in VTMIS do Programa Comunitário de I&D TRANSPORTS . Relatório efe
N/A
Year: 1998
Number Pages:
3 p.
Author(s): Covas, J. A.
Editor: ******
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Short-term stochastic numerical and physical simulation of sea waves - Proposta de Projecto de Investigação apresentada ao Programa PRAXIS XXI, na área científica de Engenharia Civil
N/A
Year: 1998
Number Pages:
53 p.
Author(s): Capitão, R.; Pires Silva, A.; Medina, J. R.; Carvalho, M. M.
Editor: ******
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Transformações Não-Lineares de Ondas Marítimas em Zonas Costeiras - Proposta de Projecto de Investigação apresentada ao Programa PRAXIS XXI , na área científica de Engenharia Civil
N/A
Year: 1998
Number Pages:
50 p.
Author(s): Covas, J. A.; Fortes, C. J. E. M.
Editor: ******
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V Programa Quadro da União Europeia. Preparação da discussão dos Programas Específicos. Documento de trabalho da Comissão (COM (97) 553 Final). Grupo de Trabalho 6 Sustainable Mobility and Intermod
N/A
Year: 1998
Number Pages:
2 p.
Author(s): Covas, J. A.
Editor: ******
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Valores extremos da agitação marítima no Algarve - Proposta de Projecto de Investigação apresentado ao Programa de Intervenção nos Laboratórios do Estado (MCT-FCT), sub-projecto Valorização e Protec
N/A
Year: 1998
Number Pages:
11 p.
Author(s): Carvalho, M. M.; Capitão, R.
Editor: ******
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