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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。
This paper studies the identification of a nonlinear structure with complex damping. A time-domain identification method that can automatically track the non-linear time-varying characteristics of a multi-degree-of-freedom system is proposed. The time domain recognition method of adaptive reference system (ARTDI) is proposed. This method constructs a reference linear system using the initial parameters of the system at a certain time (usually selected t=0), and maps the nonlinear identification transformation to the linear problem under the guidance of the reference system, thereby establishing an ARMA model and a Yulewalker equation. In order to achieve linear recognition of nonlinear structures. The results of the large-scale shaking table test of the trash rack structure at Manwan Power Station are given in this paper to confirm the correctness and effectiveness of the theoretical methods used in this study.