火箭橇结构动力学仿真分析技术研究

Research on Structure Dynamic Simulation Analysis Technology of Rocket Sled

火箭橇系统是一种以火箭发动机为动力沿地面固定轨道高速飞行的地面试验设备,在试验过程中,其外界激励复杂,所提供的力学环境条件较为恶劣,因此在试验前对火箭橇结构系统进行动力学分析在火箭橇结构设计中是必不可少的。主要针对某火箭橇减振结构平台进行动力学分析,利用ANSYS的动力响应分析系统对典型火箭橇减振结构系统进行模态分析、谐响应分析、瞬态响应分析以及谱分析的仿真分析,并与实验室结果进行了对比分析。通过以上分析可以解决火箭橇减振设计中的振动分析问题,并对结构的减振设计提供依据。

The rocket sled system is a large ground simulating test facility which takes rocket motor as power to run at high speed on the fitting rail.With complex external prompting and abominable mechanics environment condition in the process of experiment,it is essential to carry on dynamic analysis in the stage of structure designs before testing.The dynamic analysis is conducted on vibration isolated platform of a rocket sled.The modal analysis,harmonic analysis,transient analysis and spectrum analysis is made to this system by using ANSYS.And contrast analysis is done between simulation result and laboratory result.These studies can solve shock problem of the rocket sled in vibration isolated design process,and provide basis for vibration isolated design.