基于DG-LS-MGF-FEM方法的空中爆炸载荷高精度数值模拟研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 69-75.

论文

于福临1，宋磊1，朱庆飞2，冀玲玲1，杨卓懿1，张博山3，孙洪源1

作者信息 +

A high-precision numerical simulation method of air blast load based on a DG-LS-MGF-FEM method

YU Fulin1，SONG Lei1，ZHU Qingfei2，JI Lingling1，YANG Zhuoyi1，ZHANG Boshan3，SUN Hongyuan1

Author information +

文章历史 +

摘要

为了求解空中爆炸强间断流场，基于Level Set（LS）方法、修正的Ghost Fluid（MGF）方法及间断Galerkin（DG）方法构建近场空中爆炸流场动力学模型，并编制空中爆炸载荷计算程序，与经典激波管问题解析解对比进行验证，求解不同近壁面条件下的空中爆炸流场压力载荷，探索近场空中爆炸载荷传播机理，并结合有限元方法（FEM）形成DG-LS-MGF-FEM流固耦合方法对集装箱靶标建筑物进行数值模拟，给出其变形和响应特征，为建筑物靶标毁伤效果分析提供一种新的高精度计算方法。

Abstract

For solving air blast load with strong discontinuities, we developed a new DG-LS-MGF method based on the Level Set (LS) method, the Modified Ghost fluid (MGF) method, and the intermittent Galerkin (DG) method, and a near-field air blast flow field dynamic model was constructed and the calculation program was compiled.The proposed method was compared with the analytical solution of the shock tube problem for verification.The pressure load of the air blast flow field under different near-wall conditions was simulated.The DG-LS-MGF method combines with the finite element method (FEM) to form the DG-LS-MGF-FEM fluid-structure interaction method for simulating the response of container target buildings subjected to air blast load.The numerical simulation gives its deformation and response characteristics.The DG-LS-MGF-FEM method provides a new high-precision calculation method for the analysis of blast damage effects.

导出引用

于福临1，宋磊1，朱庆飞2，冀玲玲1，杨卓懿1，张博山3，孙洪源1. 基于DG-LS-MGF-FEM方法的空中爆炸载荷高精度数值模拟研究[J]. 振动与冲击, 2020, 39(24): 69-75

YU Fulin1，SONG Lei1，ZHU Qingfei2，JI Lingling1，YANG Zhuoyi1，ZHANG Boshan3，SUN Hongyuan1. A high-precision numerical simulation method of air blast load based on a DG-LS-MGF-FEM method[J]. Journal of Vibration and Shock, 2020, 39(24): 69-75

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