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一、引言试验模态分析的发展大体可分为三个阶段。六十年代,主要采用正弦测试技术。在航空航天工业界,主要方法是基于正弦多点激振的相位共振技术。机械工业界则在基于正弦慢扫频激振的频率响应测试仪(当时称为机械阻抗分析仪或传递函数分析仪)开发成功后,利用实频、虚频特性的相位分离技术或异纳园拟合的识别方法来确定被测结构的动力特性。七十年代,试验模态分析技术蓬勃发展。基于快速富里哀变换(FFT)的动态信号分析仪和小型计算机在实验室广泛应用。采用各种宽频带激振的快速频响测试技术和在小型计算机上实
I. INTRODUCTION The development of experimental modal analysis can be divided into three stages. Sixties, the main use of sinusoidal test technology. In the aerospace industry, the main method is phase resonance based on sinusoidal multi-point excitation. Mechanical industry is based on the sinusoidal slow swept frequency response tester (then known as mechanical impedance analyzer or transfer function analyzer) after the successful development of the use of real-time, virtual frequency characteristics of the phase separation technology or different garden Fitting identification method to determine the dynamic characteristics of the structure under test. In the seventies, experimental modal analysis technology flourished. Dynamic signal analyzers and small computers based on fast Fourier transform (FFT) are widely used in the laboratory. Using a variety of wide-band excitation fast frequency response test technology and in small computers