非线性振动结构的识别  

IDENTIFICATION OF NONLINEAR VIBRATING STRUCTURES

作　　者：张立翔[1] 李崇孝[1] 范家参[1] 

机构地区：[1]云南工学院

出　　处：《工程力学》1994年第2期110-122,共13页Engineering Mechanics

基　　金：云南省应用基础研究基金

摘　　要：本文研究了具有复阻尼非线性振动结构的识别。提出了一种能自动跟踪适应多自由度系统非线性时变特性的时域识别方法－自适应参考系统时域识别法（ＡＲＴＤＩ）。该方法利用系统某一时刻的起始参数（一般选ｔ＝０时刻）构造一参考线性系统，将非线性的识别变换映射成参考系统指导下的线性问题，由此建立ＡＲＭＡ模型及Ｙｕｌｅｗａｌｋｅｒ方程，从而实现非线性结构的线性识别。文中给出了漫湾电站拦污栅结构的大型振动台试验识别结果，以印证本研究理论方法的正确和有效。An adaptive reference system time domain identification method which can trace the time variation characteristics of multidegree nonlinear vibrating structures with complex dampings is presented in this paper. This approach transforms or maps the nonlinear structural system into a linear one based on a known reference system(linear),and establishes ARMA model and Yule-Walker equation.It makes it possible to identify the nonlinear structures by means of using the existed linear identification methods.An example of a hydro-tsucture located at high seismic in tensily region (8 degree)is presented to illustrate the effectiveness and creditability of this new technique.

关 键 词：识别 非线性振动 结构动力学 

分 类 号：TU311.3[建筑科学—结构工程]