脉冲载荷形状对防爆墙连接件动力响应影响研究  

Influence of pulse loading shape on dynamic response of blast wall connectors

作　　者：卞安祺 李春宝 柴威 BIAN Anqi;LI Chunbao;CHAI Wei(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063

出　　处：《中国舰船研究》2023年第6期177-185,共9页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52201379);中央高校基本科研业务费专项资金资助项目(3120622898)。

摘　　要：[目的]防爆墙在抗爆过程中,其连接件容易产生变形损伤,导致抗爆结构失效,因此需要研究爆炸载荷下防爆墙连接件的结构响应特性。[方法]运用LS-DYNA软件,在保证各施加载荷对应能量相等的条件下,设定三角、渐加、线性衰减、矩形这4种载荷形式对防爆墙连接件结构的动力响应进行数值仿真模拟,研究载荷形状对连接件变形特性的影响。[结果]结果显示,在线性衰减及矩形载荷作用下,防爆墙连接件更易产生较大位移,其与三角及渐加载荷相比,最大变形量差值可达202.6%,最大应力值差值可达93.8%,且在反向工况下随峰值压力的增加更易出现塑性变形。[结论]所做研究可为防爆墙连接件的结构设计优化提供参考。[Objectives]During the anti-explosion process,the deformation and damage of blast wall connectors can lead to anti-explosion failure.Therefore,it is necessary to study the structural response characteristics of blast wall connectors under explosive loading.[Methods]Specifically,four load forms,namely triangular load,gradually applied load,linearly decaying load and rectangular load,are set in LS-DYNA in order to simulate the dynamic response of blast wall connectors under the condition that the energy of each applied load is equal.[Results]The results show that for cases with linearly decaying and rectangular pulses,blast wall connectors are more likely to deform and suffer higher stress values.Blast wall connectors are more sensitive to gradually applied load and rectangular load,and the corresponding maximum deformation and maximum stress value can be 202.6%and 93.8%higher respectively than cases with the other two types of loads.Additionally,reverse loading conditions can lead to significant deformation,and the increment of peak pressure can induce plastic deformation under reverse pulse loads.[Conclusions]This study can provide useful references for the design of blast wall connectors.

关 键 词：防爆墙 连接件 载荷形状 塑性形变 

分 类 号：U661.4[交通运输工程—船舶及航道工程]