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光滑粒子流体动力学有限元法接触算法研究

DOI: 10.11858/gywlxb.2011.02.001, PP. 97-103

Keywords: 光滑粒子流体动力学方法,有限元法,接触,背景粒子,冲击

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Abstract:

耦合光滑粒子流体动力学(SPH)方法和有限元法(FEM),是研究冲击动力学问题的一种有效途径。为解决SPH粒子和有限单元间的接触问题,提出了SPH-FEM接触算法。该算法是在有限元节点处设置背景粒子,采用SPH接触算法的思想,计算施加在SPH粒子和有限元节点上的接触力,并且以外力的形式分别加入到SPH动量方程和有限元动力学方程中。利用SPH-FEM接触算法,对两杆撞击以及圆柱形钢弹正冲击钢板发生的冲塞破坏过程进行了三维数值模拟,靶板采用含损伤的Johnson-Cook模型和Grüneisen状态方程,模拟结果与实验结果吻合较好。

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