半球壳冲击土壤的SPH-FEM耦合分析方法

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摘要 SPH 方法作为一种具有无网格、拉格朗日性质的动力学求解算法，已经广泛应用于冲击动力学的研究。采用SPH-FEM耦合分析和8组试验进行半球壳冲击土壤的对比分析，比较加速度时程曲线和局部变形图，验证SPH-FEM方法在处理此类问题中的适用性。利用SPH-FEM方法得到的能量和冲击力时程曲线，归纳出土壤的能量耗散机理。分析表明，数值模拟结果和试验结果吻合较好，SPH-FEM方法能胜任模拟半球壳冲击土壤的整个过程。土壤是一种很好的能量缓冲体。

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关键词 ： SPH-FEM, 冲击, 土壤, 半球壳, 加速度

Abstract：SPH method, a Lagrangian, meshless hydrodynamics method, had been widely applied in the impact dynamics research. In order to validate the applicability of the SPH-FEM method in the problem of impact on soil, the SPH-FEM coupling analysis and eight tests were adopted. The acceleration-time history curve and local deformation from SPH-FEM models and tests were compared. The energy dissipation mechanism of the soil was summarized by the energy and impact force-time history curves were obtained by the SPH-FEM method. The study showed the SPH-FEM method can greatly simulate the whole process of the hemispherical shell impact soil in which the numerical simulation results are in good agreement with the experimental results. The soil is a good cushion material.

Key words： SPH-FEM, impact, soil, hemisphere shell, acceleration

收稿日期: 2016-08-12 出版日期: 2017-08-28

引用本文:

罗杰1，肖建春1，马克俭1，毛家意2. 半球壳冲击土壤的SPH-FEM耦合分析方法[J]. 振动与冲击, 2017, 36(17): 195-199.
LUO Jie1 XIAO Jian-chun1 MA Ke-jian1 MAO Jia-yi2. Coupled SPH-FEM Method for Analyzing Hemispherical Shell Impact on Soil. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(17): 195-199.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I17/195

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