航天器中频力学环境预示研究进展

中频声振力学环境严重影响着航天器的可靠性和安全性,具有响应复杂、预示难的特点,因此航天器结构的中频动力学问题是当前研究的难点和热点。文章介绍了三类主要的中频预示方法,即改进的确定性方法、改进的统计能量法和混合法的基本理论和应用现状。结合航天器工程需求,对比和分析了几类中频预示方法的计算效率、应用前景和理论局限。最后,提出采用有限元与统计能量分析(FE-SEA)混合法作为国内航天器中频力学环境预示方法,并指出了FE-SEA混合法的研究方向。

Research Evolution on Mid-frequency Mechanical Environment Predication of Spacecraft

The mid-frequency vibro-acoustic mechanical environment, featuring of complex response and formidable prediction, has a severe impact on the reliability and safety of spacecraft, therefore the mid-frequency dynamic problem of spacecraft structures is a research hotspot and difficulty. In this paper, the basic theories and applications of three primary mid-frequency predi- cation methods are introduced, such as improved deterministic methods, improved statistical energy methods and hybrid methods. Based on the requirements of spacecraft engineering, the calculation efficiencies, application prospects and theory limitations of these methods are com- pared and analyzed. A suggestion of using the hybrid FE-SEA method as the mid-frequency me- chanical environment predication method of Chinese spacecraft engineering is proposed, and the research directions of the hybrid FE-SEA method are presented.