冲击和振动载荷下固体火箭发动机响应传递特性仿真分析  

Simulation analysis of response transmission characteristics of solid rocket motor under shock and vibration loads

作　　者：易晓雪 张薇 隋欣[1] YI Xiaoxue;ZHANG Wei;SUI Xin(School of Aerospace Engineering,Beijing Institute of Technology,Beijing100081,China;Beijing Power Machinery Institute,Beijing100076,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]北京动力机械研究所,北京100076

出　　处：《固体火箭技术》2024年第4期583-592,共10页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(61971038)。

摘　　要：为优化固体火箭发动机的结构布局,改善地面力学试验的精确度,采用有限元仿真方法研究了发动机在着陆冲击载荷和挂飞段随机振动载荷作用下的响应传递特性和分布规律,分析得到了冲击和振动响应谱,并与试验数据进行对比。结果表明:在X方向着陆冲击作用下,响应沿轴向和径向的变化均不超过10%;在Y方向着陆冲击作用下,响应沿轴向和径向衰减约达30%;在X方向随机振动作用下,响应沿轴向变化很小,但沿径向衰减约30%;在Y方向随机振动作用下,响应沿轴向和径向大幅增加1~2倍。In order to optimize structure layout of solid rocket motor and improve accuracy of ground mechanical test,the re⁃sponse transmission characteristics and distribution law of solid rocket motor under landing shock load and random vibration load in the hang⁃up section were studied by means of finite element simulation method.The shock and vibration response spectra were ana⁃lyzed and compared with the test data.The results show that under the landing shock in X direction,the change of the response in both axial and radial direction is less than 10%.Under the landing shock in Y direction,the response attenuates about 30%in axial and radial direction.Under the action of random vibration in X direction,the response changes little along the axis,but decays about 30%along the radial direction.Under the action of random vibration in Y direction,the response increases significantly by 1~2 times along the axial and radial direction,and the research conclusions can provide reference for adjusting and optimizing the loading mode and measuring point arrangement of the ground test.

关 键 词：固体火箭发动机 地面力学试验 有限元法 冲击工况 振动工况 响应传递 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]