【摘要】 介绍了试验模态分析的基本理论及应用该理论测定实际结构模态参数的主要方法，并以中国核动力院低功率反应堆的现场测试试验为例，介绍了测试工作的主要过程和数据处理方法，给出了左右热交换器及连接管道段前二阶固有频率和阻尼比，以及堆本体结构及堆池内出水管道段的前三阶固有频率、阻尼比和模态振型。更多还原

【Abstract】 Basic theory on test model analysis and principle method based on the theory,with which structural parameters can be found though test,are briefly introduced in this paper.The field test of the nuclear reactor built by the Nuclear Power Institute of China are taken as an example in the analysis,the course of test and data processing are discussed in detail,the natural frequences and the damping rates of the heat transfer and its connected pipes,as well as the natutal frequences and the damping rates and the shake modes of the core of the reactor and its connected pipe,are presented in this paper.更多还原