Blar i NTNU Open på forfatter "Yu, Zhaolong"
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Fluid Structure Interaction Analysis of Abnormal Wave Slamming Events
Fimreite, Stina Bjørgo (Master thesis, 2022)I ekstreme sjøtilstandar kan bølgeslag påføre marine konstruksjonar store deformasjonar. Bølgeslag påfører konstruksjonen høge trykk med store variasjonar i tid og stad. Samankoplinga mellom hydrodynamiske laster og ... -
FSI Analysis of Abnormal Wave Slamming Events
Cao, Anni (Master thesis, 2020)Slamming impact is a hazardous phenomenon to ships and offshore structures, which is characterised by a highly nonlinear coupling interaction between the structure and the fluid. To evaluate it correctly and accurately is ... -
Glacial ice impacts: Part I: Wave-driven motion and small glacial ice feature impacts
Lu, Wenjun; Amdahl, Jørgen; Lubbad, Raed; Yu, Zhaolong; Løset, Sveinung (Peer reviewed; Journal article, 2021)Glacial ice features in the northern and central Barents Sea may threaten ships and offshore structures. Particularly, small glacial ice features, which are difficult to detect and manage by concurrent technologies, are ... -
Glacial ice impacts: Part II: Damage assessment and ice-structure interactions in accidental limit states (ALS)
Yu, Zhaolong; Lu, Wenjun; van den Berg, Marnix; Amdahl, Jørgen; Løset, Sveinung (Peer reviewed; Journal article, 2021)Floating glacial ice features of various sizes pose a substantial threat to the structural integrity of offshore structures in ice-prone regions. Relatively small ice feathers, e.g., bergy bits and growlers, are a major ... -
Hydro-plastic response of beams and stiffened panels subjected to extreme water slamming at small impact angles, Part I: An analytical solution
Yu, Zhaolong; Amdahl, Jørgen; Greco, Marilena; Xu, Hui-li (Journal article; Peer reviewed, 2019)Water impact (slamming) is a strongly nonlinear phenomenon including significant fluid structure interactions. In the case of slamming with a small impact angle between the structure and water, the coupling between ... -
Hydro-plastic response of beams and stiffened panels subjected to extreme water slamming at small impact angles, Part II: Numerical verification and analysis
Yu, Zhaolong; Amdahl, Jørgen; Greco, Marilena; Xu, Hui-li (Journal article; Peer reviewed, 2019)An analytical model has been proposed for the response of beams and stiffened panels subjected to extreme flat or nearly flat water impacts in Part I of the two-part companion paper. The model aims to capture the significant ... -
Hydro-plastic slamming
Yu, Zhaolong; Amdahl, Jørgen (Chapter, 2019)Ships and offshore structures will unavoidably experience water impacts (slamming) through-out their service time. During slamming, the coupling between hydrodynamic pressure and the elastic structural response, termed as ... -
Hydrodynamic and structural aspects of ship collisions
Yu, Zhaolong (Doctoral theses at NTNU;2017:250, Doctoral thesis, 2017)Ships and offshore installations operating at sea are exposed to the risk of collision accidents, which may cause severe consequences. It is therefore crucial to understand the physics of the collision process and to design ... -
Implementation of Linear Potential-Flow Theory in the 6DOF Coupled Simulation of Ship Collision and Grounding Accidents
Yu, Zhaolong; Shen, Yugao; Amdahl, Jørgen; Greco, Marilena (Journal article, 2016)Ship collisions and groundings are highly nonlinear and transient, coupled dynamic processes involving large structural deformations and fluid structure interactions. It has long been difficult to include all effects in ... -
Large inelastic deformation resistance of stiffened panels subjected to lateral loading
Yu, Zhaolong; Amdahl, Jørgen; Sha, Yanyan (Journal article, 2018)This paper presents a simplified formulation for the assessment of large deformation resistance of stiffened panels subjected to lateral loading. The method is based on rigid plastic material assumptions and the use of ... -
MARSTRUCT benchmark study on nonlinear FE simulation of an experiment of an indenter impact with a ship side-shell structure
Ringsberg, Jonas W; Amdahl, Jørgen; Chen, Bai Qiao; Cho, Sang-Rai; Ehlers, Sören; Hu, Zhiqiang; Kubiczek, Jan M; Korgesaar, Mihkel; Liu, Bin; Marinatos, Janis N; Niklas, Karol; Parunov, Joško; Quinton, Bruce WT; Rudan, Smiljko; Samuelides, Manolis; Soares, Carlos Guedes; Tabri, Kristjan; Villavicencio, Richard; Yamada, Yasuhira; Yu, Zhaolong; Zhang, Shengming (Journal article; Peer reviewed, 2018)This paper presents a benchmark study on collision simulations that was initiated by the MARSTRUCT Virtual Institute. The objective was to compare assumptions, finite element models, modelling techniques and experiences ... -
Numerical analysis of local and global responses of an offshore fish farm subjected to ship impacts
Yu, Zhaolong; Amdahl, Jørgen; Kristiansen, David; Bore, Pål Takle (Journal article; Peer reviewed, 2019)Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms into more exposed sea regions where the environmental conditions are much more severe. Like other ... -
Numerical Investigation of the Collision Damage and Residual Strength of a Floating Bridge Girder
Sha, Yanyan; Amdahl, Jørgen; Dørum, Cato; Yu, Zhaolong (Chapter, 2018)For bridges across wide and deep waterways, fixed foundation structures are not possible to be built due to technical restrictions. Alternatively, pontoon supported floating bridges which do not require fixed foundations ... -
Numerical investigations of the dynamic response of a floating bridge under environmental loadings
Sha, Yanyan; Amdahl, Jørgen; Aalberg, Aleksander; Yu, Zhaolong (Journal article; Peer reviewed, 2018)Floating bridges across wide and deep fjords are subjected to the environmental wind and wave loadings. In this study, the dynamic response of floating bridges under such loadings is investigated. A floating bridge concept, ... -
Numerical modelling and dynamic response analysis of a 10 MW semi-submersible floating offshore wind turbine subjected to ship collision loads
Yu, Zhaolong; Amdahl, Jørgen; Rypestøl, Martin; Cheng, Zhengshun (Journal article; Peer reviewed, 2022)The number of installed offshore wind turbines is continuously growing worldwide in recent years. Offshore wind farms are generally located near the coast close to traffic lanes and are exposed to the risk of collisions ... -
A numerical solver for coupled dynamic simulation of glacial ice impacts considering hydrodynamic-ice-structure interaction
Yu, Zhaolong; Amdahl, Jørgen (Peer reviewed; Journal article, 2021)Glacial ice features pose great threats on the safety of ships and offshore structures in the arctic. House sized bergy bits or growlers are of particular concern because of the detection capability limits of marine radars. ... -
Performance of large diameter steel tubes from a floating offshore wind turbine under lateral impact loads
Ren, Yongli; Yu, Zhaolong; Hua, Xugang; Amdahl, Jørgen; Chen, Zhengqing (Chapter, 2023)Floating offshore wind turbines (FOWTs) are expected to be increasingly installed in the world to harvest wind power in deep waters. Offshore wind turbines are often located near the coasts close to the traffic lanes and ... -
A Rayleigh-Ritz solution for high order natural frequencies and eigenmodes of monopile supported offshore wind turbines considering tapered towers and soil pile interactions
Yu, Zhaolong; Amdahl, Jørgen (Peer reviewed; Journal article, 2023)Offshore wind turbines may be exposed to extreme or accidental loads during the service life, such as extreme water slamming, ship collisions, earthquakes, extreme winds, ice loads, etc. Under the action of such loads, ... -
Ship collision against a 10 MW semi-submersible floating offshore wind turbine
Yu, Zhaolong; Amdahl, Jørgen (Chapter, 2021)The number of installed offshore wind turbines is continuously expanding worldwide in recent years. Floating offshore wind farms are generally located near the coast close to traffic lanes and are exposed to the risk of ... -
Ship collision analysis of monopile offshore wind turbines
Bruun, Vilde Eirin Eidsæther (Master thesis, 2021)Med økene etterspørsel for energi og nye bærekraftsmål er offshore vindturbiner en gyllen mulighet til å utnytte det fulle potensialet til vindenergi, og å redusere etterspørselen på en bærekraftig måte. Derimot utgjør den ...