波浪作用下半潜式网箱浮架结构的参数敏感性分析OA北大核心CSTPCD

In order to investigate the mechanical performance of semi-submersible net cages under wave action,a parameter sensitivity analysis was conducted on the outer diameter of the cage components.A numerical hydrodynamic model of the semi-submersible net cage was established using the boundary element method,and after validating the accuracy of the model,a finite element method was introduced to calculate the stress distribution of the net cage.Subsequently,based on the Latin hypercube sampling method,sample schemes were extracted,and the Spearman coefficient of each design parameter was calculated to comprehensively analyze the sensitivity of each design parameter.Further individual analysis of parameter sensitivity was conducted,and recommended ranges for these parameters during structural optimization were provided.The results showed that the design parameters of the semi-submersible net cage were negatively correlated with the maximum stress within their range of values.Specifically,the sensitivity of the outer diameter of the lower support pipe was the highest,while the sensitivity of other parameters was relatively close.The recommended ranges for the outer diameter of the upper and lower arch pipes were relatively large,ranging from 36 cm to 56 cm and from 46 cm to 76 cm,respectively.The recommended ranges for the outer diameter of the middle arch pipe,inclined pipe,and slender columns were relatively small,ranging from 23 cm to 28 cm,38 cm to 40 cm,and 50 cm to 60 cm,respectively.The outer diameter of the lower support pipe and upper support pipe should not be less than 70 cm and 50 cm,respectively.The research results can provide reference for the structural optimization of semi-submersible net cages under wave action.