Influence of multiple structural parameters on buffer performance of a thin-walled circular tube based on the coupling modeling technique

IF 3.4 Q1 ENGINEERING, MECHANICAL 国际机械系统动力学学报(英文) Pub Date : 2022-12-13 DOI:10.1002/msd2.12060
Kun Jiang, Xinggan Lu, Hao Wang
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Abstract

Pyrotechnic devices are widely used in the aerospace and defense industries. However, these devices generate high-frequency and high-amplitude shock responses during their use, compromising safe operation of the system. In this paper, the application of a thin-walled circular tube as the energy absorber in pyrotechnic devices is investigated. To accurately predict the shock load and the buffer performance of the thin-walled circular tube, a coupled model connecting the energetic material combustion and finite element simulation is established. The validity of the coupled model is verified by comparing with experiments. Then, the collapse mechanism of the thin-walled circular tube is studied, and the influence of multiple structural parameters on its buffer performance is analyzed. The results show that the thin-walled circular tube effectively reduces the shock overload. The maximum shock overload reduced from 572 612g to 11 204g in the studied case. The structural parameters of the thin-walled circular tube mainly affect the deformation process and the maximum shock overload. The order of importance of structural parameters to the maximum shock overload is determined, among which the wall thickness has the most significant effect.

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基于耦合建模技术的多结构参数对薄壁圆管缓冲性能的影响
烟火装置广泛应用于航空航天和国防工业。然而,这些设备在使用过程中会产生高频和高振幅的冲击响应,影响系统的安全运行。本文研究了薄壁圆管作为吸能材料在烟火装置中的应用。为了准确预测薄壁圆管的冲击载荷和缓冲性能,建立了含能材料燃烧与有限元模拟相结合的耦合模型。通过与实验的比较,验证了该耦合模型的有效性。然后,研究了薄壁圆管的坍塌机理,并分析了多种结构参数对其缓冲性能的影响。结果表明,薄壁圆管能有效降低冲击过载。在研究的情况下,最大冲击过载从572 612g减少到11 204g。薄壁圆管的结构参数主要影响变形过程和最大冲击过载。确定了结构参数对最大冲击过载的重要程度,其中壁厚对最大冲击过载的影响最为显著。
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