摘要
文章介绍了利用随机振动的试验数据进行模态参数辨识的方法。先从理论上证明了从响应数据推导出的传递特性函数可以代替传统的传递函数求出脉冲响应函数,从而直接利用最小二乘复指数法进行模态参数辨识；然后以桁架结构为例,通过随机振动试验数据求得模态参数,并与模态试验的结果相比较,证明该方法的可行性。
A method of modal parameter identification using datas of random vibration tests is introduced.It is deduced that the transfer function can be substituted by the transmissibilities computed directly from the response data.So the impulse response function can be derived.The identification can be done using the LSCE method.In this paper,the modal parameter is obtained from the datas of random vibration test of a trussed frame,and comparison with the results of the modal test is given. The feasibility of the idea is proved well.
出处
《航天器环境工程》
2005年第5期257-260,共4页
Spacecraft Environment Engineering
关键词
基础激励
随机振动
模态参数
base driven
random vibration
modal parameter
