Antiknock analysis and structure optimization for coal mine cylindrical shell refuge capsule under gas explosion load
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摘要: 矿用救生舱是矿井安全生产中必备的救生装备，其稳定性和抗爆性能决定着逃生人员的生存概率。本文中设计了一种圆柱壳结构救生舱，优化了该救生舱在瓦斯爆炸载荷作用下的抗爆性能：首先，采用ANSYS/LS DYNA软件模拟并验证了爆炸流场载荷；其次，采用ALE流固耦合算法揭示了真实环境下爆炸流场与救生舱的耦合作用；然后，对其进行抗爆性模拟分析及结构设计优化；最后，对比分析了原模型和优化模型的动力响应、强度及能量变化特征，结果表明优化后的救生舱抗爆性满足国家规范要求。Abstract: Coal mine rescue capsules are an indispensable equipment for safe production and effective rescue in coal mines, and their efficiency and stability directly determine the rescue efficiency and the antiknock performance in coal mines. In this paper, a cylindrical shell rescue capsule was designed to guarantee the stability of the capsule under a gas explosion load. Firstly, the load of the explosion field was simulated using ANSYS/LSDYNA and validated with previously reported data. Secondly, the coupling effect between the flow field of the explosion shock wave and the rescue capsule was revealed using the ALE fluid-structure coupling algorithm in real coalmine conditions. Thirdly, the antiknock performance analysis and structural design optimization were conducted on the original model. Finally, the dynamic response, strength and energy variation were compared for the original model and the optimized version qualitatively and quantitatively. The results show that the antiknock performance of the optimized model has reached the required national standards of China.
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Key words:
- gas explosion /
- impact load /
- fluid-solid interaction /
- antiknock performance /
- dynamic response
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图 3 瓦斯爆炸实验值、理论值及模拟值对比
Figure 3. Comparison of experimental, theoreticaland numerical data
图 5 不同时刻救生舱的等效应力分布
Figure 5. Distribution of equivalent stress of rescue capsule at different moments
图 6 不同时刻救生舱的位移分布
Figure 6. Distribution of displacement of rescue capsule at different moments
图 8 不同时刻优化模型等效应力分布
Figure 8. Distribution of equivalent stress of optimization model at different moments
图 9 不同时刻优化模型位移分布
Figure 9. Distribution of displacement of optimal model at different moments
图 10 原模型与优化模型关键结构动态响应对比
Figure 10. Comparison of dynamic response of key components on original and optimized models
图 11 原模型与优化模型的动能、内能及总能量对比
Figure 11. Comparison of kinetic energy, internal energyand total energy of original and optimized models
表 1 线性多项式方程中的参数
Table 1. Parameters used in linear polynomial equation of state
材料 ρ/(kg·m-3) C0/Pa C1/Pa C2/Pa C3/Pa C4 C5 C6 E/(kJ·m-3) V0 空气 1.29 -1×105 0 0 0 0.4 0.4 0 250 1 瓦斯 1.23 0 0 0 0 0.274 0.274 0 340 1 
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