某弹簧分离装置冲击环境统计分析及天地差异性研究  

Shock environment statistical analysis for a spring separate device and shock data difference between flight test and ground one

作　　者：高庆[1,2] 商霖[2] 苏大亮[3] 朱辰[2] 蔡毅鹏 赵永辉[1] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]中国运载火箭技术研究院,北京100076 [3]中国航天科技集团公司,北京100048

出　　处：《振动与冲击》2017年第17期206-210,共5页Journal of Vibration and Shock

基　　金：国家重点实验室2015年开放课题(MCMS-0115G01);国防技术基础科研项目(JSZL2015203B002)

摘　　要：在分析某弹簧分离装置冲击环境的过程中,发现设备支架相同位置处的冲击数据在多次地面和飞行试验之间存在较大差异。统计分析表明两组冲击环境近似服从对数正态分布;一致性检验结果证明两冲击环境存在显著差异,但散差量级基本一致;初步分析认为边界条件和测量系统是导致天地差异性的主要原因。这些结论能为冲击环境的统计分析、条件制定以及试验设计等提供参考。In analyzing shock environment of a spring separate device,the shock data difference between flight test and ground one was found at the same position of one equipment bracket. It was shown through statistical analysis that the two shock environments obey the log-normal distribution; there is a significant difference between flight shock environment and ground shock one using a consistency check,but their variance levels are almost the same; boundary conditions and the measurement system are considered to be the major factors causing the difference. These conclusions provided a reference for shock environment statistical analysis,defining test specification and designing shock environment tests.

关 键 词：高频冲击 弹簧分离装置 对数正态分布 天地差异性 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程]