Inverse Reconstruction of Environmental Loads and Virtual Model Test

doi:10.16183/j.cnki.jsjtu.2022.398

Abstract

Abstract:

Novel methods of inverse reconstruction of environmental loads and virtual model test for hybrid model test are proposed. The environmental loads are extracted from the physical truncated model test, considering the nonlinear effects such as coupling effect among the six-degrees-of-freedom (6 DOF) motions and wave slamming, and viscous force of the fluid. The loads can be further applied to the numerical model in virtual wave basin to conduct virtual model test with truncated and full-depth mooring system. Wave basin tests under combined wave, wind, and current condition are conducted to validate the proposed methods, and the results show that the environmental loads can be accurately reconstructed from the physical model tests.

Key words: hybrid model test, mooring system, reconstruction of environmental load

CLC Number:

U661.73

LI Xu, XIAO Longfei, WEI Handi, WU Wencheng, ZHU Ziyang, LI Yan. Inverse Reconstruction of Environmental Loads and Virtual Model Test[J]. Journal of Shanghai Jiao Tong University, 2024, 58(2): 141-146.

Figures/Tables 8

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References 10

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参数	取值
型长/m	99.45
型宽/m	87.10
吃水/m	23.00
重心距基线高度/m	22.69
排水量/t	77 262.70
横摇惯性半径/m	37.47
纵摇惯性半径/m	35.77
首摇惯性半径/m	43.22

序号	方向/(°)	海况	试验名称
1	—	静水	自由衰减试验
2	180	静水	水平刚度试验
3	90	静水	水平刚度试验
4	180	12级台风,十年一遇	风浪流试验
5	90	12级台风,十年一遇	风浪流试验

运动	固有周期/s		相对误差/%
运动	数值结果	试验结果	相对误差/%
垂荡	23.1	23.3	0.9
横摇	41.4	42.3	2.2
纵摇	48.4	48.3	-0.2

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