Numerical Simulation on Shock Failure Characteristics of Pipe Surface with Different Radii under Gas Explosion

Procedia Engineering Pub Date : 2018-01-01 DOI:10.1016/j.proeng.2017.12.015

Zhen-zhen Jia, Qing Ye, Wei Liu, Yi Lu, Tang-rui Wu, Zhuo-hua Yang, Shao-fei Zhu

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引用次数: 10

Abstract

In order to obtain the failure characteristics of pipe surface under the shock wave action of gas explosion, the physical and mathematical model of gas explosion in pipe were established by LS-DYNA software, and the shock failure characteristics of pipe surface with different radii under gas explosion were simulated, the radius is 0.4 m, 0.6 m, 0.8 m and 1.0 m, respectively. Results showed that with the increase of the radius, the duration of the pressure "platform" in the measuring point A and B is obviously shortened, fluctuation range produced by the pressure curves in measuring points C, D, E and F change less, but their fluctuation time is shortened. The explosion pressure increases and the failure degree increases with increase of the radius. Finally, the influence of scale effect of gas explosion and its propagation process on gas explosion propagation parameters is obtained. The research results have some guiding effects on gas explosion and disaster prevention.

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瓦斯爆炸作用下不同半径管道表面激波破坏特性的数值模拟

为了获得管道表面在瓦斯爆炸冲击波作用下的破坏特征，利用LS-DYNA软件建立了管道内瓦斯爆炸的物理模型和数学模型，模拟了半径分别为0.4 m、0.6 m、0.8 m和1.0 m的不同半径管道表面在瓦斯爆炸作用下的冲击破坏特征。结果表明:随着半径的增大，A、B测点压力“平台”持续时间明显缩短，C、D、E、F测点压力曲线产生的波动幅度变化较小，但波动时间缩短。随着爆炸半径的增大，爆炸压力增大，破坏程度增大。最后，得到了瓦斯爆炸的尺度效应及其传播过程对瓦斯爆炸传播参数的影响。研究结果对瓦斯爆炸和瓦斯灾害防治具有一定的指导作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Procedia Engineering

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