| 引用本文: | 邓斌,董可海,谢燕.基于能量耗散的药柱粘弹性累积损伤.[J].国防科技大学学报,2013,35(1):24-27.[点击复制] |
| DENG Bin,DONG Kehai,XIE Yan.Viscoelastic cumulative damage of dolid propellant grain based on energy dissipation[J].Journal of National University of Defense Technology,2013,35(1):24-27[点击复制] |
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| 基于能量耗散的药柱粘弹性累积损伤 |
| 邓斌1, 董可海2, 谢燕1 |
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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.海军航空工程学院 飞行器工程系，山东 烟台 264001)
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| 摘要: |
| 基于不可逆能量耗散的损伤变量定义方法和动态线粘弹性理论，建立了固体推进剂累积损伤模型，利用不同拉伸速率下的试验数据，拟合得到了推进剂破坏耗散能表达式，进而给出了推进剂在周期应力响应下的累积损伤计算式，并讨论了周期应力幅值和频率对累积损伤的影响，最后对某舰载发动机药柱进行了累积损伤及使用寿命分析。提出的累积损伤分析方法，为固体发动机贮存寿命预估提供了一条有益的技术途径。 |
| 关键词: 固体推进剂 能量耗散 粘弹性 累积损伤 |
| DOI： |
| 投稿日期：2011-09-20 |
| 基金项目:国家部委资助项目 |
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| Viscoelastic cumulative damage of dolid propellant grain based on energy dissipation |
| DENG Bin1, DONG Kehai2, XIE Yan1 |
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(1.Collage of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.Department of Aircraft Engineering, Naval Aeronautical Engineering Academy, Yantai 264001, China)
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| Abstract: |
| A cumulative damage model of solid propellant was established based on energy dissipation damage variable defining method and dynamic linear viscoelastic theory. The expression of dissipated energy when destroyed was obtained according to the experimental data of different stretch rates, and the formula of cumulative damage for grain was presented as well. Considering influence of circular stress magnitude and frequency, the rule of cumulative damage varying was researched respectively, and a case of cumulative damage and life prediction for solid rocket motor grain was analyzed finally. The method is beneficial for the storage life prediction of solid rocket motor. |
| Keywords: solid propellant energy dissipation viscoelasticity cumulative damage |
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