摘要
目的为航天产品的研制提供一套行之有效的结构振动特性设计方法和必须的设计、试验条件,增强产品对振动、冲击等动力学环境的适应性。方法在设计阶段采用计算模态分析方法来预估产品的固有频率及振型等动态特性;在试验阶段采用试验模态分析方法来辨识产品的动态参数。结果计算模态分析系统具有对机械结构进行结构静、动力分析,结构固有频率和振型计算等功能,在设计阶段可作为机械产品动态特性的辅助设计工具;试验模态分析系统具有实时采集力和加速度信号的功能,并能通过对所采集到的数据进行处理获得基本模态参数,可作为机械产品动态特性修改及进行减振设计的辅助工具。结论两个试验件的计算结果和测试结果表明本研究所提供的计算模态分析系统和试验模态分析系统是有效的,该方法可用于装船产品的结构振动特性设计。
Objective To present an effective method for structural dynamic characteristics design, required design and test means for space products’ development. Method Computational modal analysis method was used to evaluate natural frequencies and modes of the products in the beginning of design, and test modal analysis method was used to identify the dynamic parameters of products in the test period. Result The proposed computational modal analysis system is capable of making static and dynamic analysis, as well as natural frequencies and modes analysis of the structure, and this system could be applied in mechanical structure dynamic characteristics design. The proposed test modal analysis system could acquire real time force and acceleration signals, and obtain the basic modal parameters by processing the sampled data. This system could be used to modify mechanical products’ dynamic characteristics and decrease vibration amplitude. Conclusion The computational and test results of two test models demonstrated that the developed computational and test modal system is effective. The method can be used for design of structural dynamic characteristics of space products.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2005年第2期140-143,共4页
Space Medicine & Medical Engineering
基金
中国载人航天工程基金项目
关键词
机械结构
振动特性
设计方法
验证系统
研制
mechanical structure
dynamic characteristics
design methods
verification system
dev elopment