燃气冲破式易碎盖冲击载荷与变形预测
Prediction of impact load and deformation of fragile cover with gas shock wave
李仁凤 1任锐 2张翔 1耿直 1朱昭君1
作者信息
- 1. 郑州航空工业管理学院航空发动机学院,郑州 450046
- 2. 中国船舶及海洋工程设计研究院二部,上海 200011
- 折叠
摘要
采用高精度数值模拟技术对开盖前发射箱内冲击波演化规律、后盖不同开盖时刻前箱盖载荷分布以及不同载荷加载方式下前盖承压变形进行了计算分析.研究结果表明:冲击波以约450 m/s的速度在箱内沿轴向传播,棱台箱盖中心区域压力大于斜面区域.后盖开盖时间距离发动机点火时间越长,燃气到达前盖的压力峰值越大,综合考虑箱内设备的安全与开盖可靠性,在0.95 ms时刻开盖时性能最优.通过对棱台型易碎前盖燃气载荷分布研究,应按照平台区域和斜面区域进行分区域变形预测,相比较平均载荷加载更有利于盖体薄弱部位设计.
Abstract
The high-precision numerical simulation technology was used to calculate and analyze the evolution law of the shock wave in the launcher before the cover opening,the load distribution of the front cover at different opening times of the rear cover and the bearing deformation of the front cover under different loading modes.The results showed that the shock wave moved axially in the launcher at a speed of about 450 m/s,and the pressure in the center area of the prism cover was greater than that in the inclined area.The longer opening time of the rear cover from the ignition time indicated the greater peak pressure of the gas reaching the front cover.Considering the safety and opening reliability,the performance was optimal when opening the cover at 0.95 ms.Through the research on the gas load distribution of the prismatic fragile front cover,the regional deformation prediction should be carried out according to the platform area and the inclined area.Compared with the average load loading,it is more conducive to the design of the weak parts of the cover.
关键词
燃气开盖/易碎盖/冲击波/发射载荷/承压变形Key words
gas cover opening/fragile cover/shock wave/launch load/bearing deformation引用本文复制引用
基金项目
河南省科技攻关计划(222102320165)
河南省科技攻关计划(232102220028)
出版年
2024
NETL
NSTL
万方数据