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一、前言近几年来,国内从事振动试验与分析的许多科研工程技术人员,对识别结构振动特性的时域技术甚感兴趣。以应用电子计算机为基础的时域技术,往往是结构动力学与其他学科的例如控制理论等交叉的产物。ITD法、QEM法、时序法以及新近提出的ERA法等都体现了学科之间的交叉。时域技术,从振动试验方面来说,通常只要求测量和记录受试验结构的自由衰减响应或随机响应,对激振信号可不做测量和记录。这就大大地降低了对激振技术和仪器设备等方面
I. INTRODUCTION In recent years, many research engineers and technicians engaged in vibration testing and analysis in China are very interested in identifying the time domain technology of structural vibration characteristics. Time domain technology based on applied computers is often a product of structural dynamics and other disciplines such as control theory. ITD method, QEM method, timing method, and the newly proposed ERA method all reflect the intersection between disciplines. Time-domain technology, from the aspect of vibration testing, usually only requires measuring and recording the free-attenuation response or random response of the tested structure, and the excitation signal may not be measured or recorded. This greatly reduces the need for exciting technologies and equipment.