基于LS-DYNA的大空间柱壳结构爆炸波压力场分析

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 70-75.

论文

基于LS-DYNA的大空间柱壳结构爆炸波压力场分析

高轩能;刘颖;王书鹏

作者信息 +

Analysis of explosive shock wave pressure distribution on large-space cylindrical reticulated shell based on LS-DYNA

GAO Xuan-neng; LIU Ying; WANG Shu-peng

Author information +

文章历史 +

摘要

基于ANSYS/LS-DYNA，在验证模型及参数选取正确及可靠的基础上，建立了大空间柱壳结构在爆炸作用下的冲击波压力场计算模型。引入本征正交分解（POD）法，解决了冲击波荷载的时空差异性和结构表面压力场分布问题，大大减少了大空间结构爆炸动力响应分析的计算量。对大空间柱壳结构在爆炸冲击荷载作用下的压力场进行了数值模拟计算与分析，研究了跨度和矢跨比等因素对结构压力场分布的影响。结果表明，计算模型适用于大空间柱壳结构在爆炸作用下的动力响应计算。

Abstract

By employing algorithm ANSYS/LS-DYNA and based on the proof of correctness and reliability of the model and parameters selection, an appropriate model for calculating the shock wave pressure distribution of the large-space cylindrical reticulated shell under explosive loading was established. Using the Proper Orthogonal Decomposition (POD) method, the problems of spatiotemporal asynchrony of shock waveforms and pressure distributions on the large-space structure surface were solved and the calculation for dynamic response of large-space structure was greatly reduced and simplified. The numerical simulation and analysis of shock wave pressure field of the large-space cylindrical reticulated shell under explosion was carried out. And the influence of span and ratio of rise to span on the pressure distribution of the structure was researched. The results showed that the calculation model is suitable for the dynamic response analysis of the large-space cylindrical reticulated shell under explosion.

导出引用

高轩能;刘颖;王书鹏. 基于LS-DYNA的大空间柱壳结构爆炸波压力场分析[J]. 振动与冲击, 2011, 30(9): 70-75

GAO Xuan-neng;LIU Ying;WANG Shu-peng. Analysis of explosive shock wave pressure distribution on large-space cylindrical reticulated shell based on LS-DYNA[J]. Journal of Vibration and Shock, 2011, 30(9): 70-75