半球壳冲击土壤的SPH-FEM耦合分析方法
发布时间：2018-07-14 12:43
【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SPHFEM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。
[Abstract]:As a meshless and Lagrangian dynamic solution method, SPH method has been widely used in the research of impact dynamics. The SPH-FEM coupling analysis and eight sets of experiments were used to compare the acceleration history curve and the local deformation diagram of the hemispherical shell impact soil. The applicability of SPHFEM method in dealing with this kind of problems was verified. Based on the energy and impact time history curves obtained by SPH-FEM method, the energy dissipation mechanism of soil was summarized. The analysis shows that the numerical simulation results are in good agreement with the experimental results. The SPH-FEM method is capable of simulating the whole process of the hemispherical shell impact soil. Soil is a good energy buffer.
【作者单位】： 贵州大学空间结构研究中心;贵阳市人民防空办公室;
【基金】：国家自然科学基金(50978064)
【分类号】：S152
，
本文编号：2121684
[Abstract]:As a meshless and Lagrangian dynamic solution method, SPH method has been widely used in the research of impact dynamics. The SPH-FEM coupling analysis and eight sets of experiments were used to compare the acceleration history curve and the local deformation diagram of the hemispherical shell impact soil. The applicability of SPHFEM method in dealing with this kind of problems was verified. Based on the energy and impact time history curves obtained by SPH-FEM method, the energy dissipation mechanism of soil was summarized. The analysis shows that the numerical simulation results are in good agreement with the experimental results. The SPH-FEM method is capable of simulating the whole process of the hemispherical shell impact soil. Soil is a good energy buffer.
【作者单位】： 贵州大学空间结构研究中心;贵阳市人民防空办公室;
【基金】：国家自然科学基金(50978064)
【分类号】：S152
，
本文编号：2121684
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