基于多介质问题的流体固体耦合数值方法及其在(7)
5 结论
本文通过爆炸与冲击动力学问题的数值模拟方法与应用,得出了以下主要结论:
1)提出一种能够处理高度非线性状态方程和弹塑性相变本构模型的多介质Riemann问题通用求解方法,能有效提高物质界面上各物理量的计算精度。
2)结合基于Euler坐标系的互不相溶、具有清晰锐利界面的可压缩多介质流动数值方法,建立了一套能够模拟具有高密度比、高压力比以及复杂状态方程的流固耦合、固固耦合问题的多介质计算体系。
3)依次对一维流固Riemann问题、固固Riemann问题、地下强爆炸问题、空中强爆炸问题和高速侵彻等问题进行数值模拟,计算结果与理论分析和实测数据比较一致,表明数值方法能够有效应用于地下强爆炸和高速侵彻等具有多介质、大变形的实际工程应用问题。
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