光滑粒子法及其与有限元耦合算法的研究进展
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摘要
拉格朗日型的有限元法和光滑粒子法在模拟材料大变形问题时各存优缺点,而有限元与光滑粒子耦合算法实现了在小变形区域采用有限元法计算,在局部的大变形区域采用光滑粒子法计算,有效地综合了有限元法计算效率高和光滑粒子法能够自然地模拟材料大变形问题的特点.重点论述了有限元法、光滑粒子法以及有限元与光滑粒子耦合算法的研究现状及应用进展,并讨论了各方法中需要进一步解决的问题.最后通过算例对3种方法的计算精度和计算效率进行了分析,供研究人员参考.
The merits and shortcomings are existed simultaneously in finite element method(FEM) and smoothed particle hydrodynamics(SPH) method, in which these methods are established based on Lagrange system. In order to makes use of high computational efciency of FEM and advantages of SPH method, such as naturally simulation of large deformation of material, the coupling algorithm of FEM with SPH method is presented to calculate region of small deformation by FEM and simulate region of large deformation by SPH method. In this paper, the research and application of FEM,SPH and FEM-SPH coupling algorithm are reviewed. And the problems existing in these methods are also discussed.Finally, the computational accuracy and efciency of FEM, SPH and FEM-SPH coupling algorithm are investigated by a numerical example, which is a reference for research fellows.
The merits and shortcomings are existed simultaneously in finite element method(FEM) and smoothed particle hydrodynamics(SPH) method, in which these methods are established based on Lagrange system. In order to makes use of high computational efciency of FEM and advantages of SPH method, such as naturally simulation of large deformation of material, the coupling algorithm of FEM with SPH method is presented to calculate region of small deformation by FEM and simulate region of large deformation by SPH method. In this paper, the research and application of FEM,SPH and FEM-SPH coupling algorithm are reviewed. And the problems existing in these methods are also discussed.Finally, the computational accuracy and efciency of FEM, SPH and FEM-SPH coupling algorithm are investigated by a numerical example, which is a reference for research fellows.
引文
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