某型导弹的地面振动条件修正与评估  

Revision and evaluation on the ground vibration conditions of a missile

作　　者：龚学兵 任全彬 岳晓奎[2] 陈超倩[3] GONG Xuebing;REN Quanbin;YUE Xiaokui;CHEN Chaoqian(The 41st Institute of the Fourth Academy of CASC,Xi'an 710025,China;College of Astronautics,Northwestern Polytechnical Unisverity,Xi'an 710072,China;Northwest Institute of Mechanical and Electrical,Dynamics and Control of underwater Vehicle,Xi'an 710072,China)

机构地区：[1]中国航天科技集团有限公司四院四十一所,西安710025 [2]西北工业大学航天学院,西安710072 [3]西北机电工程研究所水下航行体动力学与控制,西安710072

出　　处：《固体火箭技术》2021年第5期696-706,共11页Journal of Solid Rocket Technology

基　　金：航天科技四院第15批青年基金课题。

摘　　要：为解决某型导弹及其关键产品在地面振动试验中出现过考核和欠考核的问题,提出了一种基于遥测数据的地面振动试验条件修正与评估方法。首先,通过功率谱分析地面振动试验数据和遥测数据,结合振动响应裕度指标,实现关键产品的振动响应量化评估。其次,通过振动响应裕度指标合理地评估关键产品在地面试验、仿真分析和飞行试验中振动响应的变化规律。最后,根据遥测数据的功率谱曲线选取拐点频率,并修正地面振动试验条件,使得关键产品的振动响应均方根值由国军标的5.7 g降低至3.4 g,避免低频欠考核和高频过考核现象。通过振动响应裕度指标,验证了该文所定振动条件的有效性。采用随机振动分析和振动响应裕度指标,能评估关键产品地面振动试验的合理性。In order to solve the problem of over assessment or under assessment in the ground vibration test of a missile and its key products,a method was proposed for revising and evaluating the ground vibration conditions based on the telemetry data.Firstly,the quantitative evaluation of vibration response of key products was realized through the power spectrum analysis of ground vibration data and telemetry data,combined with the vibration response margin index.Secondly,the variation law of vibration response of key products in the ground vibration test,simulation analysis and flight test were reasonably evaluated by vibration response margin index.Finally,the inflection point frequency was selected according to the power spectrum curve of telemetry data,and the ground vibration test conditions were revised to reduce the root mean squared value of vibration response of key products from 5.7 g of the national military standard to 3.4 g,so as to avoid the phenomenon of low frequency under assessment and high-frequency over assessment.The effectiveness of the vibration conditions determined in this paper was verified by the vibration response margin index.The rationality of ground vibration tests for key products could be evaluated by random response analysis and vibration response margin index.

关 键 词：地面振动试验 功率谱 飞行振动环境分析 振动环境条件修正 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程]