液体火箭发动机公路运输响应分析与支撑方案优选  

Response analysis of liquid rocket engine during road transportation and optimal selection of the support scheme

作　　者：武新峰[1] 雷勇军[1] 李磊[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《强度与环境》2009年第6期8-13,共6页Structure & Environment Engineering

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0148);高等学校博士学科点专项科研基金(20069998002)

摘　　要：对发动机进行合理地支撑是防止液体火箭发动机在公路运输过程中出现损伤的重要措施。采用通用有限元软件建立了发动机和支撑结构的三维有限元模型,通过动力学分析得到了系统的固有频率和振型及频域内的动力学响应特性。通过对支撑结构刚度和垫片阻尼进行优选,并添加辅助支撑结构,有效地降低了发动机加速度响应峰值。A reasonably support structure is an important measure to prevent the damage to Liquid Rocket Engine （LRE） during road transportation. A 3-D FEM model of LRE and support structure is established, and then dynamic analysis is executed. The natural frequencies and modal shapes of the system are obtained, and the characteristics of dynamic response in frequency domain are also presented. Through the optimal selection of stiffness and damping, and the application of assistant support structure, the acceleration responses of LRE are effectually reduced.

关 键 词：液体火箭发动机 公路运输 随机响应分析 优选 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]