| 引用本文: | 申志彬,姜人伟,职世君.伞盘结构对大长径比发动机药柱结构完整性的影响.[J].国防科技大学学报,2017,39(1):148-152.[点击复制] |
| SHEN Zhibin,JIANG Renwei,ZHI Shijun.Effects of umbrella slot on the structure integrity of solid rocket motor grain with large aspect ratio[J].Journal of National University of Defense Technology,2017,39(1):148-152[点击复制] |
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| 伞盘结构对大长径比发动机药柱结构完整性的影响 |
| 申志彬1, 姜人伟1, 职世君2 |
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(1. 国防科技大学 航天科学与工程学院， 湖南 长沙 410073;2. 中国空空导弹研究院， 河南 洛阳 471000)
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| 摘要: |
| 为了提高大长径比发动机药柱结构完整性水平，基于三维黏弹性有限元法，计算某大长径比固体发动机在温度和内压荷载联合作用下的结构响应；研究伞盘结构及其位置对药柱最大Von Mises应变的影响规律；讨论当伞盘位于药柱中部时，伞盘最大Von Mises应变随伞盘宽度、深度以及顶部圆弧半径比的变化规律。结果表明，伞盘位于药柱中部时可以有效地降低大长径比药柱的最大Von Mises应变，增加伞盘宽度、深度或选取合适的半径比均可降低伞盘结构的最大Von Mises应变。所得结论可为固体发动机设计提供参考。 |
| 关键词: 固体发动机 大长径比 药柱 伞盘 应力应变分析 |
| DOI：10.11887/j.cn.201701023 |
| 投稿日期：2015-08-25 |
| 基金项目:国家自然科学基金资助项目（U1404106）；中国博士后科学基金资助项目（2014M552684） |
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| Effects of umbrella slot on the structure integrity of solid rocket motor grain with large aspect ratio |
| SHEN Zhibin1, JIANG Renwei1, ZHI Shijun2 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. China Airborne Missile Academy, Luoyang 471000, China)
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| Abstract: |
| To improve the structural integrity of solid rocket motor grain with large aspect ratio, based on three-dimensional viscoelastic finite element method and taking into account of the temperature load and pressure load, the structural response of a solid rocket motor with large aspect ratio was analyzed, the effects of the umbrella slot and its location on maximum Von Mises strain of the grain were studied, and the variations of the maximum Von Mises strain of the umbrella slot with its width, depth and radius ratio were discussed when the umbrella slot was in the middle of the grain. The results show that the Von Mises strain is reduced when the umbrella slot is in the middle of the grain; increasing the width, depth or choosing the best radius ratio can reduce the maximum Von Mises strain of the umbrella slot. The conclusions are beneficial for designing the grain configuration of solid rocket motor. |
| Keywords: solid rocket motor large aspect ratio grain umbrella slot stress and strain analysis |
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