采用互相关复指数法进行工作模态参数识别

该文在互相关函数理论的基础上，将响应间的互相关函数代替传统复指数法中的脉冲响应函数，提出了一种可以对工作状态下的结构进行模态分析的方法－互相关复指数法。采用一飞机模型对该方法进行了试验验证，所得结果同适调激振法所得结果基本吻合，证实了该文采用的方法可以确实有效地单独从响应数据中提取工作状态下结构的模态参数。

Operating Modal Parameters Extraction Using Cross-correlation Complex Exponential Method

A modal parameter extraction scheme in operating conditions-polyreference cross correlation complex exponential method is presented in this paper. It is based on the theory of cross-correlation functions by treating the cross correlation functions between outputs instead of impulse response function in the traditional complex exponential method. An experiment on an aircraft model is performed to verify the proposed technique. The results from this method give a good agreement with those from the pure mode method. It approves that the proposed method can be used to extract modal parameters of the operating structures from response only.