Investigation on the unsteady hydrodynamic loads of ship passing by bridge piers by a 3-D boundary element method

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Abstract

A 3-D Rankine type Green function boundary element method is developed to estimate the unsteady hydrodynamic interaction during ship passing piers process. To address this moving boundary problem, a free surface re-meshing algorithm based on the combination of local mesh and global mesh is proposed to update fluid boundary and the boundary value formula is solved at each time step. Two alternative numerical models for ship passing piers problem are compared with the current analysis method. Based on the three numerical models, the characteristics of the hydrodynamic loads acting on the passing ship are specified and the critical positions for the peak values have been identified. Simulation results demonstrate that the fluid disturbance induced by the piers is of importance. Therefore, the study of ship–piers hydrodynamic interaction in a river must be handled as a different forward speeds problem. Additionally, the wave elevation effect can only be neglected on condition that the forward speed is very low.
LanguageEnglish
Pages122-133
Number of pages12
JournalEngineering Analysis with Boundary Elements
Volume94
Early online date17 Jul 2018
DOIs
Publication statusPublished - 30 Sep 2018

Fingerprint

Bridge piers
Piers
Boundary element method
Ship
Boundary Elements
3D
Hydrodynamics
Ships
Hydrodynamic Interaction
Numerical models
Mesh
Wave effects
Moving Boundary Problem
Fluid
Remeshing
Fluids
Boundary Value
Green's function
Free Surface
Disturbance

Keywords

  • boundary element method
  • Rankine source
  • ship-to-piers
  • unsteady hydrodynamic interaction
  • passing and encountering

Cite this

@article{f526e271319d4b74a00e7134989c4d05,
title = "Investigation on the unsteady hydrodynamic loads of ship passing by bridge piers by a 3-D boundary element method",
abstract = "A 3-D Rankine type Green function boundary element method is developed to estimate the unsteady hydrodynamic interaction during ship passing piers process. To address this moving boundary problem, a free surface re-meshing algorithm based on the combination of local mesh and global mesh is proposed to update fluid boundary and the boundary value formula is solved at each time step. Two alternative numerical models for ship passing piers problem are compared with the current analysis method. Based on the three numerical models, the characteristics of the hydrodynamic loads acting on the passing ship are specified and the critical positions for the peak values have been identified. Simulation results demonstrate that the fluid disturbance induced by the piers is of importance. Therefore, the study of ship–piers hydrodynamic interaction in a river must be handled as a different forward speeds problem. Additionally, the wave elevation effect can only be neglected on condition that the forward speed is very low.",
keywords = "boundary element method, Rankine source, ship-to-piers, unsteady hydrodynamic interaction, passing and encountering",
author = "Liang Li and Zhi-Ming Yuan and Chunyan Ji and Ming-Xin Li and Yan Gao",
year = "2018",
month = "9",
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T1 - Investigation on the unsteady hydrodynamic loads of ship passing by bridge piers by a 3-D boundary element method

AU - Li, Liang

AU - Yuan, Zhi-Ming

AU - Ji, Chunyan

AU - Li, Ming-Xin

AU - Gao, Yan

PY - 2018/9/30

Y1 - 2018/9/30

N2 - A 3-D Rankine type Green function boundary element method is developed to estimate the unsteady hydrodynamic interaction during ship passing piers process. To address this moving boundary problem, a free surface re-meshing algorithm based on the combination of local mesh and global mesh is proposed to update fluid boundary and the boundary value formula is solved at each time step. Two alternative numerical models for ship passing piers problem are compared with the current analysis method. Based on the three numerical models, the characteristics of the hydrodynamic loads acting on the passing ship are specified and the critical positions for the peak values have been identified. Simulation results demonstrate that the fluid disturbance induced by the piers is of importance. Therefore, the study of ship–piers hydrodynamic interaction in a river must be handled as a different forward speeds problem. Additionally, the wave elevation effect can only be neglected on condition that the forward speed is very low.

AB - A 3-D Rankine type Green function boundary element method is developed to estimate the unsteady hydrodynamic interaction during ship passing piers process. To address this moving boundary problem, a free surface re-meshing algorithm based on the combination of local mesh and global mesh is proposed to update fluid boundary and the boundary value formula is solved at each time step. Two alternative numerical models for ship passing piers problem are compared with the current analysis method. Based on the three numerical models, the characteristics of the hydrodynamic loads acting on the passing ship are specified and the critical positions for the peak values have been identified. Simulation results demonstrate that the fluid disturbance induced by the piers is of importance. Therefore, the study of ship–piers hydrodynamic interaction in a river must be handled as a different forward speeds problem. Additionally, the wave elevation effect can only be neglected on condition that the forward speed is very low.

KW - boundary element method

KW - Rankine source

KW - ship-to-piers

KW - unsteady hydrodynamic interaction

KW - passing and encountering

UR - https://www.sciencedirect.com/journal/engineering-analysis-with-boundary-elements

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JO - Engineering Analysis with Boundary Elements

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