| 刘建,沈瑞琪*,叶迎华,胡艳.固体微推进器热应力影响模拟分析[J].实验力学,2010,25(4):431~437 |
| 固体微推进器热应力影响模拟分析 |
| Numerical Analysis of Effect Factors on Thermal Stress in a Solid Micro- thruster |
| 投稿时间：2009-11-16 修订日期：2010-03-04 |
| DOI： |
| 中文关键词: 固体微推进器 药室阵列 热应力 热变形 热-结构耦合 |
| 英文关键词:solid microthruster powder chamber array thermal stress thermal deformation coupled thermal-structural |
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| 中文摘要: |
| 为了解热作用对固体微推进器结构稳定性的影响因素及规律，应用ANSYS热-结构耦合瞬态计算方法，模拟分析了微推进器阵列作用单元数、燃气温度、作用时间及阵列结构对微推进器药室热应力及热变形的影响。分析结果表明：最大热应力及热变形主要集中在药室孔边界处，是结构中最薄弱的部位；与单个单元作用时相比，阵列同时作用时最大等效热应力较大，而最大变形量较小；且其最大等效热应力及最大变形量随燃气温度、作用时间及药室直径的增加而增加，随阵列单元间距的增大而减小。 |
| 英文摘要: |
| To have an insight of the effect factors and regulation of thermal action on the structural stability in a solid microthruster，simulation and analysis of effect of the arrayed cell number，the gas combustion temperature，the thermal action time and the array structure on the thermal stress and thermal deformation of microthruster powder chamber were carried out based on coupled thermal-structural transient state analysis of ANSYS．Results show that the maximum value of equivalent thermal stress and thermal deformation are located on the edge of powder chamber hole，which is the most brittle part in a microthruster powder chamber due to thermal stress and thermal deformation．Compared with single cell action，the maximum equivalent thermal stress and the maximum thermal deformation of simultaneous action produced by arrayed cells are significantly increased; meanwhile, the maximum equivalent thermal stress and the maximum thermal deformation of powder chamber increase with the gas combustion temperature increasing, the action time and the powder chamber diameter，however decrease with cell spacing increasing. |
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