PYROVALVE SIMULATION AND EVALUATION
PYROVALVE SIMULATION AND EVALUATION
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DOI：
10.2514/6.1997-3103
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发表时间：
1997-07
期刊：
影响因子：
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通讯作者：
S. Ben-Shmuel;S. Goldstein
中科院分区：
文献类型：
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作者：
S. Ben-Shmuel;S. Goldstein
常开高温阀是航天器上经常使用的爆炸性弹药装置，用于关闭运载流体的管路。这类器械的动力学尚未完全了解，因此操作裕度未知。建模允许深入了解高温阀操作的物理特性，并为分析现有设计、理解故障和及时评估纠正性修改提供了工具。利用有限元固体力学软件LS-DYNA 3D建立了一种二通常开式高温阀的三维实体模型。模拟结果表明，由于爆轰炸药的冲击载荷，高温阀执行其功能。阀门的冲头可以通过50毫克RDX的组合来切割管道的切口部分，用于引发炸药和切割冲头与高温阀外壳表面之间的摩擦。模拟提供了一个更好的理解常开的高温阀的动态行为。
Normally open pyrovalves are often used explosive ordnance devices on space vehicles for closure of lines carrying fluids. The dynamics of this class of device are not fully understood and thus the margins of operation are unknown. Modeling allows insight into the physics of pyrovalve operation and provides a tool for the analysis of existing designs, the understanding of failures, and the timely assessment of corrective modifications. A 3-D model of a 2-way, normally open pyrovalve has been set up with LS-DYNA3D, a finite element solid mechanics code. The simulations show that pyrovalves perform their function due to shock loading from a detonating explosive. The valve's ram can be made to cut clear through the tube's cutout section with a combination of 50 mg RDX for initiator explosive and friction between the cutting ram and pyrovalve housing surfaces. The simulation provides for a better understanding of the dynamic behavior of normally open pyrovalves.