一种面向舰船结构毁伤的大变形流固耦合数值计算方法  

A numerical method for fluid-structure interaction with large deformation towards the damage of warship structures

作　　者：王杰 王景焘 黄超 伍洋 刘娜 张磐[1,2] WANG Jie;WANG Jing-tao;HUANG Chao;WU Yang;LIU Na;ZHANG Pan(CAEP Software Center for High Performance Numerical Simulation,Beijing 100088,China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,China)

机构地区：[1]中物院高性能数值模拟软件中心,北京100088 [2]北京应用物理与计算数学研究所,北京100088

出　　处：《计算力学学报》2024年第2期335-343,共9页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11971070)资助项目.

摘　　要：水下爆炸导致舰船结构毁伤是一个复杂的非线性大变形流固耦合过程,高精度的流固耦合计算是获得高置信模拟结果的关键。基于浸没边界思想,本文提出一种面向大变形壳理论的流固耦合数值方法,可精确刻画流固耦合界面并高效求解流固界面约束方程。基于该方法,本文提出了完整的适用于水下爆炸舰船结构毁伤的大变形流固耦合数值计算方案,并基于大规模并行编程框架,研发形成适用于舰船结构毁伤的流固耦合大规模并行计算软件。与泰勒平板理论解和水下爆炸结构冲击响应实验数据等进行对比表明,本文方法可有效模拟大变形流固耦合工程问题,具备较高数值求解精度。在此基础上,完成了水下爆炸整船结构毁伤过程大规模数值模拟。该方法可有效应用于舰船毁伤等级评估,应用前景广阔。The key challenge to simulate the complex dynamic responses of naval warships subjected to underwater explosions with high fidelity is how to establish a numerical method which can precisely calculate the fluid-structure interaction with large deformation.In this paper,we propose a high-precision method for two-way fluid-structure interaction(FSI)based on the immersed boundary idea,including a high-resolution description of the coupling interface of a shell with large deformation and a highly accurate imposition method of the coupling conditions.Furthermore,a complete numerical scheme of fluid-structure interaction is presented for naval warships subjected to underwater explosions with large deformation.A special CAE computer program is developed with the aid of the parallel programming framework,which has the parallel capability scaling up to ten thousand CPU cores.The presented method is compared with the Taylor’s plate theory and underwater impact experiments.The results show the efficiency and the accuracy of the method on FSI with large deformation.Additionally,a whole warship of complex structures subjected to an underwater explosion is numerically simulated.The proposed method exhibits a wide prospect in the applications to accurately evaluate the damage level of warships subjected to underwater explosion.

关 键 词：大变形流固耦合 浸没边界法 舰船结构毁伤 并行编程框架 

分 类 号：O346.5[理学—固体力学] O35[理学—力学]