砰击载荷作用下双体船强度计算方法研究

摘要

The research of ship slamming load and structure response has been closely watched.For catamaran,slamming the parts can be divided into the bottom slamming,flare slamming and wave on the deck,and connected to the adjacent hull deck underside,slamming the wet deck.Now for the catamaran slamming calculation is not perfect,so it is quite necessary for the ship slamming research.This paper specification,respectively,and the direct calculation,catamaran strength under the action of the slamming load effect were studied.Specification was mainly based on the China classification society standard slamming load calculation.By linear potential flow theory,direct calculation forecasted ship wave relative velocity,with the help of the relevant specification to determine the slamming pressure coefficient,realized the slamming load of direct calculation.Through the finite element software load calculation,this paper analyzed and compared two kinds of load calculation method of catamaran strength to guide design practice of catamaran parts of structure subjected to slamming load.%舰船的砰击载荷与结构响应的研究一直备受关注.对于双体船来说,砰击按部位可分为底部砰击、外飘砰击和甲板上浪,和连接相邻船体的甲板下侧,即湿甲板砰击.目前对于双体船的砰击计算还不完善,因此对于该船型的砰击研究十分必要.本文分别利用规范计算和直接计算的方式,对砰击载荷作用下双体船强度影响进行研究.规范计算主要基于中国船级社规范计算砰击载荷,直接计算则是通过线性势流理论预报船波相对速度,借助相关规范确定砰击压力系数,实现砰击载荷的直接计算.通过有限元软件加载计算,分析比较2种载荷计算方法对双体船强度的影响,以指导砰击载荷作用下双体船局部结构的设计实践.