Article
Engineering, Civil
Jian Dai, Bjorn Christian Abrahamsen, Thomas Viuff, Bernt Johan Leira
Summary: This paper presents a numerical study on the effect of wave-current interaction on fjord-crossing floating bridges. The dynamic response of the bridge under the combined action of waves and current is analyzed using a three-dimensional potential flow solver. The results show that the wave-current interaction has a significant effect on the structural response of the floating bridge.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Bernardo Morais da Costa, Jungao Wang, Jasna Bogunovic Jakobsen, Jonas Thor Snaebjornsson, Ole Andre Oiseth
Summary: This study uses numerical and meteorological models to test a 5 km curved floating bridge in Norway under strong wind events. It finds that the response of the structure is larger under inhomogeneous winds compared to homogeneous winds, suggesting the need for further research on inhomogeneous wind effects to improve fatigue and extreme response predictions of long wind-sensitive structures.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Engineering, Ocean
Minghao Cui, Zhengshun Cheng, Torgeir Moan
Summary: This study investigates the effects of inhomogeneous wave modeling on the extreme responses of a long end-anchored floating bridge. The inhomogeneous wave field modeling accounts for the spatial variation of wave spectral parameters and the coherence of wave elevations between different positions. Structural responses under various wave conditions are simulated, and long-term extreme responses are approximated using a simplified environmental contour method. The study finds that the coherence of wave elevations has a significant influence on the standard deviation and spatial correlation of the responses, and extreme values of the axial force vary between different inhomogeneous wave load models, especially considering partially correlated wave fields.
APPLIED OCEAN RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Omar El Beshbichi, Henrik Rodstol, Yihan Xing, Muk Chen Ong
Summary: The modified environmental contour method (MECM) is assessed for predicting the extreme response of a floating wind turbine concept. The results show that MECM can reduce underpredictions and provide accurate analysis compared to the full long-term analysis (FLTA).
Article
Biodiversity Conservation
Ankit Shekhar, Lukas Hortnagl, Nina Buchmann, Mana Gharun
Summary: In this study, the long-term changes in forest NEP resistance and NEP recovery in response to extreme atmospheric dryness were quantified using data from 60 forest sites across the world. The results showed that forest types, LAI, and local VPD conditions explained over 50% of variance in both NEP resistance and NEP recovery, with drier sites showing higher NEP resistance and NEP recovery.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Engineering, Marine
Heng Huang, Xujun Chen, Junyi Liu, Haipeng Shen, Yuji Miao
Summary: An analytical method based on elastic foundation beam theory and Euler beam theory is proposed for structural analysis of a pontoon-separated floating bridge connected by elastic hinges. The method can solve displacement, rotation angle, bending moment, and shearing force under vertical static loads, and its validation is established through comparison with numerical results. The study reveals significant influence of rotation stiffness of elastic hinges on the responses of the floating bridge, emphasizing the importance of considering elastic deformation when the rotation stiffness reaches a certain value.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Engineering, Marine
Antonio Mikulic, Josko Parunov
Summary: This study creates environmental contours for significant wave heights and peak wave periods in the Adriatic Sea, providing important data for marine engineering design and operations in the region, as well as technical support for the installation of renewable energy facilities.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Zhiwei Xu, Gonglian Dai, Y. Frank Chen, Huiming Rao
Summary: This study investigates the sensitivity of long-term extreme value distribution of a high-speed railway cable-stayed bridge to non-Gaussian intensity, with a focus on the torsional angle's reaction to non-Gaussian turbulence wind. The research utilizes a hybrid approach combining machine learning algorithm and virtual process method to study the single and combined effects of turbulence skewness and kurtosis on the bridge's long-term EVDs. The results reveal that the virtual process method is effective for predicting structural long-term EVDs without significant loss of accuracy.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Adrian Esteban-Arranz, Ana Raquel de la Osa, Wendy Eunice Garcia-Lorefice, Javier Sacristan, Luz Sanchez-Silva
Summary: This study optimized the performance of cement-based epoxy resin coatings in aggressive environments by functionalizing with different nanoparticles. The nanomodified coatings with activated carbon and silica showed the best adherence and abrasion resistance properties.
Article
Engineering, Civil
Tor M. Lystad, Aksel Fenerci, Ole Oiseth
Summary: This paper proposes a new algorithm for efficiently solving the full long-term problem through sequential Gaussian Process (GP) surrogate modeling. The algorithm trains a GP surrogate model to replace the buffeting response calculation in wind-sensitive structures, improving computational efficiency and accuracy of the response estimate. The algorithm is demonstrated on a practical design problem and compared with other methods, showing comparable efficiency and enhanced accuracy.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Tor M. Lystad, Aksel Fenerci, Ole Oiseth
Summary: The study suggests that the current design practice for wind excited long-span bridges, using short-term extreme response analyses with deterministic turbulence parameters, may significantly underestimate the long-term design stresses. Both the variability of the turbulence parameters and the uncertainty in the short-term extreme response are important factors to consider when estimating design stresses. The comparison between long-term extreme acceleration responses and the measured responses at the Hardanger Bridge shows considerable improvements to the current design practice.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Ocean
Cheng Li, Haijia Zhang, Hao Zhang, Bin Sun, Shaolin Yang
Summary: In this paper, a twin pontoon floating breakwater with kelp (TPFBK) is proposed and studied experimentally and numerically. Results show that TPFBK exhibits better wave attenuation performance compared with the traditional TPFB. The arrangement of kelp helps reduce on-shore mooring force but increases off-shore mooring force. The wave dissipation mechanism is influenced by the arrangement of kelp.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Marine
Ling Wan, Jian Dai, Dongqi Jiang, Kok Keng Ang
Summary: This study introduces three curved floating bridge concepts for crossing coastal waters in Singapore, with analyses conducted on static, eigen value, regular wave, and irregular wave conditions to evaluate bridge behavior. Selected bridge configurations are further studied, and conclusions are drawn with recommendations on design parameters for further investigations.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Green & Sustainable Science & Technology
Andreas F. Haselsteiner, Malte Frieling, Ed Mackay, Aljoscha Sander, Klaus-Dieter Thoben
Summary: The study found that the environmental contour method currently recommended in the IEC design standard for offshore wind turbines can significantly underestimate the 50-year return value of response variables, mainly due to the method used to construct the contour, neglecting serial correlation in environmental conditions, and neglecting the short-term variability in the response.
Article
Engineering, Civil
Yong Cheng, Lei Fu, Saishuai Dai, Maurizio Collu, Chunyan Ji, Zhiming Yuan, Atilla Incecik
Summary: This study evaluates the hydrodynamic performances of an oscillating buoy (OB) type single-pontoon floating breakwater (SPFB) and an oscillating water column (OWC) type dual-pontoon floating breakwater (DPFB) and compares them comprehensively. It is found that the wave attenuation and energy conversion of the OWC-type DPFB are better than those of the OB-type SPFB. Strong wave nonlinearity can result in the reduction of energy extraction.
COASTAL ENGINEERING
(2022)
Article
Mathematics, Interdisciplinary Applications
Tore A. Helgedagsrud, Yuri Bazilevs, Kjell M. Mathisen, Ole A. Oiseth
COMPUTATIONAL MECHANICS
(2019)
Article
Computer Science, Interdisciplinary Applications
Tore A. Helgedagsrud, Yuri Bazilevs, Artem Korobenko, Kjell M. Mathisen, Ole A. Oiseth
COMPUTERS & FLUIDS
(2019)
Article
Engineering, Civil
Tore A. Helgedagsrud, Yuri Bazilevs, Kjell M. Mathisen, Ole A. Oiseth
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2019)
Article
Construction & Building Technology
Giorgio Diana, Stoyan Stoyanoff, Ketil Aas-Jakobsen, Andrew Allsop, Michael Andersen, Tommaso Argentini, Miguel Cid Montoya, Santiago Hernandez, Jose Angel Jurado, Hiroshi Katsuchi, Igor Kavrakov, Ho-Kyung Kim, Guy Larose, Allan Larsen, Guido Morgenthal, Ole Oiseth, Simone Omarini, Daniele Rocchi, Martin Svendsen, Teng Wu
STRUCTURAL ENGINEERING INTERNATIONAL
(2020)
Article
Engineering, Civil
O. W. Petersen, O. Oiseth, E. Lourens
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2020)
Article
Engineering, Civil
Thomas Viuff, Xu Xiang, Bernt Johan Leira, Ole Oiseth
JOURNAL OF BRIDGE ENGINEERING
(2020)
Article
Engineering, Civil
Tor M. Lystad, Aksel Fenerci, Ole Oiseth
ENGINEERING STRUCTURES
(2020)
Article
Construction & Building Technology
Aksel Fenerci, Knut Andreas Kvale, Oyvind Wiig Petersen, Anders Ronnquist, Ole Oiseth
Summary: This data paper describes a large data set of wind and acceleration data collected through long-term monitoring of the Hardanger Bridge in Norway. The data set includes both raw and organized data, published in an open-access data repository. The paper discusses the monitoring system used, methods of signal processing and data adjusting, as well as the organization and summary of the data set.
JOURNAL OF STRUCTURAL ENGINEERING
(2021)
Article
Acoustics
Knut Andreas Kvale, Ole Oiseth
Summary: In this study, numerical predictions of the dynamic response of an existing floating pontoon bridge are compared with measured data. Hydrodynamic analysis and a beam model are combined in a finite element method framework for stochastic response prediction. The study emphasizes predictions under serviceability and ultimate limit state conditions, discussing the overall quality of the prediction model.
SHOCK AND VIBRATION
(2021)
Proceedings Paper
Construction & Building Technology
K. A. Kvale, O. Oiseth
Summary: By automatically performing modal analysis, the correlation between environmental parameters and modal parameters can be investigated. The suggested method is independent of the operational modal analysis method applied and will be relevant for all parametric methods where stabilization charts are traditionally needed.
BRIDGE MAINTENANCE, SAFETY, MANAGEMENT, LIFE-CYCLE SUSTAINABILITY AND INNOVATIONS
(2021)
Proceedings Paper
Engineering, Civil
Knut Andreas Kvale, Ole Oiseth, Anders Ronnquist
DYNAMICS OF CIVIL STRUCTURES, VOL 2
(2019)
Article
Construction & Building Technology
A. Zasso, T. Argentini, S. Omarini, D. Rocchi, O. Oiseth
Article
Engineering, Civil
Oyvind Wiig Petersen, Ole Oiseth, Eliz-Mari Lourens
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2019)
Article
Engineering, Marine
Chunhao Jiang, Lin Lin, Nian-Zhong Chen
Summary: A novel type of side structure for enhancing the crashworthiness of double-hull vessels is proposed based on auxetic materials. Numerical simulation demonstrates the resistance to collision of three different unit cells. A comparative study shows that the proposed side structures have superior energy absorption and collision resistance compared to traditional side structures.
Article
Engineering, Marine
Lihua Xu, Jiasong Wang, Michael S. Triantafyllou, Dixia Fan
Summary: This paper presents a data assimilation method based on the POD-DeepONet structure to fuse two types of fidelity data from vortex-induced vibration (VIV) problems. The POD-DeepONet structure provides better accuracy and more stable predictions for amplitude response, successfully capturing the changing trend with the oncoming flow speed. The exponentially fitted MSE formula allows for quick determination of the required case number under the expected error.
Article
Engineering, Marine
Ilias Gavriilidis, Aris G. Stamou, Christos Palagas, Efthimios Dourdounis, Nikos Voudouris, Athanasios Tazedakis, Spyros A. Karamanos
Summary: This study investigated the collapse resistance of thick-walled steel pipes fabricated with the JCO-E process for deep offshore applications. It conducted a comprehensive analysis using experimental, numerical, and analytical approaches to examine the effects of heat treatment on the collapse behavior of two JCO-E pipes. The results were compared with the predictions of the DNV-ST-F101 standard, and the fabrication factor afa was discussed. The study also explored the impact of yield strength recovery due to heat treatment on the collapse of pipes with different D/t ratios.
Article
Engineering, Marine
Sung-Jae Kim, Chungkuk Jin, MooHyun Kim
Summary: This study evaluates the effects of tsunami waves on the global performance of a spread-moored Floating Storage Unit (FSU) through tsunami-floater-mooring coupled dynamics simulations. The results show that larger tsunami heights and relatively short durations result in significantly increased motions and mooring tensions of the FSU.
Article
Engineering, Marine
Ling Zhu, Zhihui Zhou, Preben Terndrup Pedersen
Summary: Ship grounding experiments are crucial for validating numerical analysis and theoretical formulations. In this study, small-scale ship model grounding tests on a sharp rock were conducted in a water tank to observe and record different damage modes, ship bottom plate damage extents, and ship motion. The test results were used to analyze the energy dissipation process and the influence of initial conditions on ship response and damage.
Article
Engineering, Marine
Zhiping Zheng, Yanlin Shao, Jikang Chen
Summary: This study investigates the effect of horizontal low-frequency (LF) displacements and velocities on the responses of floating structures in irregular waves, focusing on a deep-draft spar buoy. The study finds that incorporating LF displacements and velocities in the seakeeping analysis is essential for reducing surge and pitch responses. The standard deviations of LF surge and pitch motions scale with significant wave height, highlighting viscous damping as the dominating damping mechanism.
Article
Engineering, Marine
Birendra Chaudhary, Hewenxuan Li, Akongnwi Nfor Ngwa, Helio Matos
Summary: This study investigates the long-term performance and effectiveness of coating systems for 3D-printed pressure vessels subjected to accelerated aging. The results show that the application of polyurethane coating systems significantly slows the degradation process, reducing critical operational depth and increasing pressure differential. This research contributes important insights into enhancing the longevity and performance of 3D-printed pressure vessels through coating systems.
Article
Engineering, Marine
Yuelin Song, Qin Dong, Jiping Zhang, Guoqiang Li, Dongfang Xu, Ping Yang
Summary: The objective of this research is to study the characteristics of low-cycle fatigue crack propagation from the perspective of accumulative plastic damage and propose a reliable prediction model for crack growth in EH-36 steel under high stress levels. Experimental findings demonstrate that increasing the mean stress and stress amplitude accelerates the progression of fatigue damage.
Article
Engineering, Marine
Hao Ding, Bo Huang, Liang Cheng, Ke Li, Qingyang Ren
Summary: This study investigates the dynamic response and cable forces of a submerged floating tunnel (SFT) under wave and wave-current interactions. Experimental results show that wave height, current velocity, and ratio of wavelength to structure size are important factors affecting the dynamic response of SFT and cable forces. The multi-anchor cable arrangement used in the experiments distributes cable forces more effectively and reduces potential safety hazards caused by cable breakage.
Article
Engineering, Marine
Baoshun Zhou, Zhixun Yang, Mostafa Amini-Afshar, Yanlin Shao, Harry B. Bingham
Summary: In the hydroelastic analysis of large floating structures, accurate prediction of response relies on the structural stiffness. However, obtaining exact structural stiffness is challenging due to the complexity of modern ship structures. This study proposes an efficient analysis technique that combines finite element and finite difference methods to calculate structural stiffness and solve hydrodynamic problems.
Article
Engineering, Marine
Xinwei Chen, Yang Yu, Lei Wang
Summary: This study introduces a framework to evaluate and compare scour prediction models, focusing on design robustness. By applying this framework, the study recommends the most favorable scour prediction model and optimal design for monopiles in OWTs.
Article
Engineering, Marine
Yu Lei, Wei Li, Xiang Yuan Zheng, Huadong Zheng, Shan Gao, Shengxiao Zhao
Summary: This paper compares the numerical results of a floating offshore wind turbine integrated with a steel fish farming cage (FOWT-SFFC) against experimental data. The study shows that the simulated responses are in good agreement with the experimental data and reveals the important influence of second-order wave forces on the simulation results.
Article
Engineering, Marine
Chenyu Luan, Torgeir Moan, Knut Andreas Kvale, Zhengshun Cheng
Summary: This paper deals with the study of the shear lag effect on the bending moment distribution in pontoon-type floating bridges. Comparative and parametric studies are carried out using beam and linear shell models to analyze the influence of shear lag on the bending stiffness and eigenmode shapes of the bridges. The study shows that elementary beam models may inaccurately predict the bending moments in bridges with large width and short span lengths, and a practical method is proposed to determine when caution is needed in using these models. The paper also highlights the complex boundary conditions near the bank abutment and the significant influence of shear lag on the bending moments in this region.
Article
Engineering, Marine
Akira Tatsumi, Yuji Kageyama
Summary: This study proposes a methodology to quantify the uncertainty of the ultimate strength of stiffened panels in steel ships and offshore structures due to the welding initial deflection. A statistical model of the initial deflection shape is developed based on measured data, and probability distributions of the ultimate strength are calculated using Monte Carlo simulation.
Article
Engineering, Marine
Zhenmian Li, Yang Yu, Xin Liu, Xiaowei Liu, Xiangyang Wang, Leige Xu, Jianxing Yu
Summary: This study evaluates the local collapses and propagating buckles of offshore pipelines under external overpressure, reverse fault displacements, and collapse failures. Different designs of integral arrestors are tested in a numerical model, and the effects of fault dip angles are investigated. The results show that integral arrestors are effective in preventing propagating buckles.