波浪与水下爆炸气泡脉动载荷联合作用下船体梁的响应特性  

Response characteristics of hull girder under the combined action of wave and underwater explosion bubble pulsation load

作　　者：翟金柱 李秋秋 孔祥韶[1] 周红昌[2] 吴卫国[1] ZHAI Jinzhu;LI Qiuqiu;KONG Xiangshao;ZHOU Hongchang;WU Weiguo(Green&Smart River-Sea-Going Ship Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Center for Innovation-Driven Development,National Development and Reform Commission,Beijing 100045,China)

机构地区：[1]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉430063 [2]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [3]国家发展和改革委员会创新驱动发展中心,北京100045

出　　处：《中国舰船研究》2023年第1期205-212,222,共9页Chinese Journal of Ship Research

基　　金：国家部委基金资助项目。

摘　　要：[目的]舰船在执行任务的过程中有可能因同时遭受波浪载荷与水下爆炸气泡脉动载荷的联合作用而使船体响应发生“叠加效应”,导致总强度的损失,因此需要探索水下爆炸气泡脉动与波浪联合作用时船体梁的动力响应规律。[方法]首先,采用理论分析的方法建立船体梁的简化模型,并对水下爆炸气泡脉动载荷与波浪载荷进行求解;然后,基于Hamilton原理,分别推导两端自由船体梁在波浪载荷与水下爆炸气泡脉动载荷单独作用及联合作用下的运动微分方程;最后,基于对运动微分方程的求解,分析船体梁的自由振动响应在与外载荷组合的3种工况下简化模型的运动响应。[结果]结果显示,在波浪载荷与水下爆炸气泡脉动载荷的联合作用下,船体梁的运动响应相比2种载荷单独作用时运动响应的线性叠加值增大了15%。[结论]所做研究可为舰船结构在联合载荷作用下运动响应分析的计算程序开发提供参考。[Objectives]During the mission,the ship may be simultaneously subjected to the combined wave load and underwater explosion bubble pulsation load,resulting in the"superposition effect"of hull response and the loss of total strength of the ship.Therefore,it is necessary to explore the dynamic response law of hull girder under the combined action of above-mentioned loads.[Methods]First,a simplified hull girder model is established by theoretical analysis,and the bubble pulsation load of underwater explosion and wave load are solved.Then,based on the Hamilton Principle,the differential equations of motion of hull girder at both free ends subjected to the two loads are derived separately and jointly.Finally,based on the solution of the motion differential equation,the hull girder’s free vibration response and the simplified model’s motion response under the three working conditions of external load combination are analyzed.[Results]The results show that under the combined action of the two loads,the motion response of the hull girder is 15%larger than the linear superposition of the motion response of the two loads alone.[Conclusions]The research done can provide a reference for developing an algorithm to analyze the motion response of ship structures under combined loads.

关 键 词：船体梁 水下爆炸 气泡脉动载荷 波浪载荷 联合作用 运动响应 

分 类 号：U661.43[交通运输工程—船舶及航道工程]