地下爆炸应力波分段有限元正演技术研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (15) : 106-110.

论文

地下爆炸应力波分段有限元正演技术研究

严波1，曾新吾2

作者信息 +

Subsection Forward Modeling Technology of Blasting Stress Wave Underground

Yan Bo1 , Zeng Xinwu2

Author information +

文章历史 +

摘要

为解决地下爆炸应力波跨时间、空间和应变率尺度正演难题，本文提出了一种分段有限元正演技术。该技术将求解区域划分为爆炸震源区和弹性响应区，在爆炸震源区采用动力有限元方法，在弹性响应区采用普通有限元方法，不同段界面之间采用节点位移的连续性为边界条件。本文从理论上说明了分段有限元正演思想的合理性，给出了该技术的具体实施步骤，并通过对比模拟研究验证了分段有限元正演技术在用于模拟爆炸应力波传播方面的正确性和有效性。

Abstract

The subsection calculating numerical simulating technology is presented to solve the problem of forward modeling of blasting stress wave which spans scales of time, space and strain rate. The simulated region is divided into the blasting source region where the dynamic finite element algorithms are applied and the elastic region where the traditional numerical simulating algorithms are applied, as well as the displacement compatibility boundary conditions of nodes in boundaries between different regions are introduced in the technology. The reasonability and implementation steps of the subsection calculating numerical simulating technology are illustrated. Numerical simulations of stress wave propagation in rock under blasting indicate that the subsection calculating technology is correct and effective.

导出引用

严波;曾新吾. 地下爆炸应力波分段有限元正演技术研究[J]. 振动与冲击, 2013, 32(15): 106-110

Yan Bo;Zeng Xinwu. Subsection Forward Modeling Technology of Blasting Stress Wave Underground[J]. Journal of Vibration and Shock, 2013, 32(15): 106-110