基于ALE方法的楔形体入水分析  

Wedge water entry analysis based on ALE method

作　　者：李上明[1] 屈明[1] LI Shangming;Qu Ming(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621999

出　　处：《计算机辅助工程》2018年第3期48-53,共6页Computer Aided Engineering

基　　金：科技部"高性能计算"重大专项(2016YFB0201004);NSAF基金(U153010026);国家自然科学基金(11272299);中国工程物理研究院科学技术发展基金(2015B0201026);中国工程物理研究院重点学科项目"计算固体力学"

摘　　要：基于ALE方法分析楔形体入水问题,楔形体采用拉格朗日网格离散,空气和水采用ALE网格离散。将楔形体视为刚体,空气和水的力学行为分别采用Gamma定律和GRUNEISEN状态方程模拟。讨论ALE流固耦合关键字中罚函数罚因子的取值方法,提出相应的建议原则;分析水域截断边界对楔形体响应的影响,给出模拟无限水域的截断边界位置的建议值;分析楔形体表面压力振荡的原因,提出楔形体表面压力获取方法。通过试验结果对比分析,验证方法的合理性。The wedge water entry problem is analyzed based on ALE method. The wedge is dispersed using Lagrange meshes. The air and water are dispersed using ALE meshes. The wedge is considered as a rigid body. The mechanics behaviors of air and water are simulated by Gamma law and GRUNEISEN state equation respectively. The method to get the penalty factors of penalty function of ALE fluid-solid coupling keywords is discussed,then accordingly principle is proposed. The influence of the truncated boundary of water area on the wedge response is analyzed. The position of truncated boundary is proposed for modelling infinite water area. The reason of pressure vibration on wedge surface is explained,and a method is proposed to obtain the pressure on the wedge surface. The rationality of the method is verified by the comparison and analysis of test results.

关 键 词：入水 ALE方法 截断边界 流固耦合 无限水域 罚函数 

分 类 号：O347.5[理学—固体力学]