敷设橡胶圆板近场水下爆炸数值模拟  

Numerical simulation of rubber coating circular plates subjected to near-field underwater explosion

作　　者：金泽宇[1,2] 殷彩玉[1,2] 谌勇[1,2] 华宏星[1,2] JIN Zeyu, FIN Caiyu, CHEN Yong, HUA Hongxing(1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China ;2 .Institute of Vibration, Shock and Noise, Shanghai Jiao Tong University, Shanghai 200240, Chin)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]上海交通大学振动冲击噪声研究所,上海200240

出　　处：《中国舰船研究》2018年第3期72-76,共5页Chinese Journal of Ship Research

基　　金：中国博士后科学基金资助项目(2017M621456);国家自然科学基金资助项目(11272215)

摘　　要：[目的]为了深入研究敷设覆盖层结构在近场水下爆炸作用下的响应特征,[方法]运用龙格库塔间断伽辽金法(RKDG)、边界元法(BEM)和有限元法(FEM)的耦合计算方法(RKDG-BEM-FEM),研究敷设橡胶圆板在近场水下爆炸载荷作用下的响应特征;通过与试验得到的湿表面压力、气泡形态等结果进行对比,验证计算方法的有效性,探讨近场水下爆炸气泡在柔性边界附近的响应特征。[结果]研究结果表明,敷设实心橡胶能够缩短冲击波的脉宽,但是更容易出现空化溃灭;敷设实心橡胶对近场水下爆炸气泡的变形影响不大。[结论]研究成果可为舰艇抗冲击结构近场水下爆炸设计提供理论依据。[Objectives]To study the coating effects on structures subjected to near-field underwaterexplosion,[Methods]the coupling Runge-Kutta Discontinuous Galerkin Method,Boundary ElementMethod and Finite Element Method are developed in this paper to solve a rubber coating circular platesubjected to near-field underwater explosion. The results are compared with experimentally obtained wetface pressure and bubble shape to verify the method,and the explosion bubble response to the flexibleboundary is discussed.[Results]The results indicate that the rubber coating plate will shorten the pulsewidth of the shockwave,but the cavitation collapse will occur more easily. In addition,solid rubbercoating has little effect on the deformation of the explosion bubble. [Conclusions]This research canprovide a theoretical basis and technical support for the coating design and optimization of warshipssubjected to near-field underwater explosion.

关 键 词：水下爆炸 流固耦合 RKDG-BEM-FEM 

分 类 号：U661.43[交通运输工程—船舶及航道工程]