一种基于板架模型的三体船连接桥结构瞬态砰击响应的分析方法  

A method for transient slamming responses of the crossstructure of a trimaran based on grillage model

作　　者：陈占阳[1,2] 杨青颖 于东 桂洪斌[1] 丛培文[2] CHEN Zhan-yang;YANG Qing-ying;YU Dong;GUI Hong-bin;CONG Pei-wen(School of Ocean Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]哈尔滨工业大学(威海),山东威海264209 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《船舶力学》2021年第11期1498-1505,共8页Journal of Ship Mechanics

基　　金：大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP2001);2020年度山东省自然科学基金面上项目(ZR2020ME262)。

摘　　要：三体船连接桥的砰击问题一直是水动力领域的难点问题。为有效减少砰击载荷作用下动态响应峰值的计算量,本文基于板架模型,提出一种借助等效静力系数的三体船连接桥结构的砰击响应分析方法。首先,通过对三维板架结构进行入水砰击的结构瞬态响应分析,将直接积分法和模态叠加法两种方法进行比较分析,选取更合适的方法进行动力响应计算;其次,通过改变计算参数,分析了边界条件和时间效应对板架应力峰值和等效静力系数的影响;最后,与三体船分段模型的计算结果进行对比,验证了借助简化模型得到等效静力系数法的可行性。本文的计算结果及相关结论能够为后续准确分析连接桥局部结构的砰击响应、合理关注连接桥的高应力位置及屈服强度的评估提供参考。The slamming of a trimaran cross-deck has always been a difficult issue in the field of hydrodynamics.In order to effectively reduce the computation of the dynamic response under the slamming load,this paper proposes a slamming response method for trimaran cross-deck with the aid of the equivalent static coefficients based on the grillage model.Firstly,by analyzing the structural transient response of a three-dimensional grillage during the water entry,the direct integration method and modal superposition method are compared to select the more appropriate method for the dynamic response calculation.Secondly,the influences of boundary condition and time effect on the peak stress and the equivalent static coefficients of the grillage are analyzed by modifying the calculation parameters.Finally,the results from the present method are compared with those of the trimaran's segmental model to verify the feasibility of the equivalent static coefficient method through the simplified model.The calculation results and related conclusions could provide reference for the subsequent accurate analysis of the slamming responses of the local structure,and the evaluation of the high stress location and yield strength of the cross-deck.

关 键 词：三体船 砰击 瞬态响应分析 等效静力系数 

分 类 号：U661.43[交通运输工程—船舶及航道工程]