圆管大应变分析的自适应单元网格划分技术

以圆薄壁钢管在冲击作用下的屈曲过程为例，描述了钢管在冲击载荷作用下，局部发生的大变形情况。在ANSYS／Ls—dyna计算中采取了不同的网格划分形式．对结果进行了变形和应力的分析比较。证明在大变形情况下，由于网格划分形式的变化，对计算精度和计算结果都有较大的影响。该方法在分析薄壁防撞杆的受冲击过程中，对局部受损情况的分析，以及防撞杆的安全性分析都有帮助。

Large Strain Analysis on Impacted Pipe with Adaptive Meshing Technology

The pipe buckling and partial large deformation on the impact loading are studded. It is adopted that different meshing forms in ANSYS/Ls-dyna, and comparative analysis on deformation and stress of the result. Under the condition of large deformation, it is proved that meshing forms influence obviously on calculating accuracy. This method provides aid for analyzing the condition of partial damage and safety when anti-ram subjects impact loading.