水下爆炸作用下舰船冲击毁伤的瞬态流固耦合FSLAB软件数值模拟分析  

Numerical analysis of transient fluid-structure interaction of warship impact damage caused by underwater explosion using the FSLAB

作　　者：刘云龙[1] 王平平 王诗平 张阿漫[1] LIU Yunlong;WANG Pingping;WANG Shiping;ZHANG Aman(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《中国舰船研究》2022年第5期228-240,共13页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52088102,51925904);国防基础科研计划资助项目(JCKY2021604B027)。

摘　　要：[目的]针对舰船近场水下爆炸和中、远场水下爆炸数值模拟难题,建立多种数值方法与计算模型。[方法]首先,依据欧拉有限元方法和声学有限元场分离方法,建立水下爆炸载荷和流固耦合模型,开发具有完全自主知识产权的流固耦合FSLAB软件;然后,分别对近场和中、远场水下爆炸进行数值模拟,得到近自由面和近壁面水下爆炸冲击波的传播特性,以及气泡形态和载荷演化的特性,获得中、远场水下爆炸对球形壳和舰船的冲击响应特性;最后,与解析解、参考解和实验值进行对比分析。[结果]结果显示,采用开发的流固耦合软件FSLAB模拟水下爆炸问题有效且精度较高。[结论]所做研究可为水下爆炸威力评估、舰船抗爆抗冲击设计提供依据和支撑。[Objectives]This paper aims to address the numerical simulation problems of the dynamic response of ships subject to near-, medium-and far-field underwater explosions by establishing several numerical methods and calculation models. [Methods]First, load and fluid-structure interaction models are established on the basis of the Eulerian finite element method and acoustic finite element method using the fieldsplit technique, and FSLAB fluid-structure interaction software is developed. Next, near-, medium-and farfield underwater explosions are numerically simulated respectively. The shock wave propagation law, bubble shape and load evolution characteristics of near free-surface and near-wall underwater explosions are obtained,and the shock response characteristics of a spherical shell and ship subject to far-field underwater explosions are analyzed. Finally, the FSLAB software results are compared with the analytical solutions, reference solutions and experimental data. [Results]The results show that the FSLAB fluid-structure interaction software developed in this paper is effective and accurate in simulating the impact damage of underwater explosions on warships. [Conclusion]This study can provide a basis and support for the power assessment of underwater anti-explosion and shock design of warships.

关 键 词：水下爆炸 舰船抗爆抗冲击 结构毁伤 FSLAB 

分 类 号：U661.43[交通运输工程—船舶及航道工程]