摘要
固体火箭发动机在机械冲击、爆轰冲击等意外激励的作用下,存在意外引燃甚至爆炸的可能性。对破片冲击固体火箭发动机进行试验,利用有限元方法对破片冲击固体火箭发动机过程进行数值模拟。进一步计算不同工况下破片冲击发动机的起爆阈值,分析影响破片冲击发动机起爆阈值的因素。计算结果表明,发动机壳体、绝热层厚度增加,破片冲击发动机起爆阈值升高,且壳体厚度增加带来的起爆阈值升高更显著;钢破片冲击铝合金壳体起爆阈值小于钢破片冲击钢壳体,小于铝合金破片冲击铝合金壳体;球形破片冲击发动机起爆阈值远高于立方体破片和平头圆柱破片;破片长宽比H/L增加,破片冲击发动机起爆阈值升高。
There is the possibility of accidental ignition or even explosion when SRM is shocked by unexpected incentives such as mechanical and detonation shocks. In this paper, we have undertaken a test on fragments impact on SRM.A finite element method has been used to simulate the fragments impact processes on SRM.Furthermore, the detonation threshold of the fragment impact SRM under different conditions has been calculated, and the factors that affect the detonation threshold have been analyzed. Calculations proves that as the thickness of the SRM case and insulation increased, the detonation threshold increases and the increase of case thickness leads to a more significant detonation threshold increase.The detonation threshold of steel fragments impact on aluminum alloy case is less than steel fragment impact on steel case. However, both of them are less than aluminum alloy fragment impact on a- luminum alloy cases.The detonation threshold of spherical fragments impact on SRM is much higher than the cube and cylindrical ones.With the aspect ratio of rectangular fragment increases, the detonation threshold of fragment impact on SRM was increased.
作者
杨琨
徐秉恒
郭运强
吴秋
YANG kun,XU Bingheng, GUO Yunqiang,WU Qiu(The 41 st Institute of the Fourth Academy of CASC, Xi＇an 710025, China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2018年第5期566-573,共8页
Journal of Solid Rocket Technology
