爆室内爆炸流场演化与壳体动力响应研究

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (10) : 106-111.

论文

爆室内爆炸流场演化与壳体动力响应研究

穆朝民1,2,3,4;任辉启4;李永池3;辛凯4

作者信息 +

Study on Blast Flow Fields Evolution and Dynamic Response of Blast Chamber

MU Chao-min1,2,3,4;REN Hui-qi4;LI Yong-chi3;XIN Kai4

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文章历史 +

摘要

针对内爆炸载荷的特点，采用等效单自由度法与薄膜理论分别得出了等效静载动效系数的解析式与径向位移的动态表达式。将反射压力代入径向位移与动效系数表达式中，得到最大径向位移与等效静载的解析式。所得解析式计算值与实验和数值模拟结果符合较好。运用三维有限元编码与现场实测的方法对爆室内冲击波流场的演化及壳体动力响应规律进行了研究。结果表明：1.内爆炸加载容器的动力响应主要取决于首次压力脉冲。2.壳体的最大应变由近爆点向远爆点方向逐渐降低。研究结果为相似工程设计设计提供了参考。

Abstract

According to the characteristics of the internal explosion loads, analytic solutions of the dynamic effect coefficient have been derived by using the equivalent single degree of freedom methods and dynamic expressions of radial dispersion have been gained by the boundary-layer theory. The maximal radial dispersion and the dynamic effect coefficient have been calculated by getting the reflected shock pressure into expressions of radial dispersion. The results show that analytic solutions are in good agreement with experimental and numeric results. The laws of shock wave propagation in blast chamber are investigated by using three-dimensional finite element codes and experiment methods. The results show that: 1.the dynamic response of shell is determined by the first pressure impulse. 2.the maximum strains of the shell decrease away from the explosion center. The analyses provide references for similar engineering designs.

导出引用

穆朝民;;任辉启;李永池;辛凯. 爆室内爆炸流场演化与壳体动力响应研究[J]. 振动与冲击, 2009, 28(10): 106-111

MU Chao-min;;REN Hui-qi;LI Yong-chi;XIN Kai. Study on Blast Flow Fields Evolution and Dynamic Response of Blast Chamber [J]. Journal of Vibration and Shock, 2009, 28(10): 106-111

中图分类号： 0383 .1