线性时变结构模态参数时域辨识方法的研究进展

With the development of engineering applications, more and more time-varying structures are being used and their intrinsic time-varying characteristics are increasingly inevitable, which brings us many problems on time-varying structural dynamics. The research background of time-varying structural dynamics and the motivation of modal parameter estimation for time-varying structures are first introduced from the standpoint of inverse problems. The modal parameter estimation methods for linear time-varying structures are classified, and the procedures to obtain "frozen-time" modal parameters from parametric time-domain identified models are subsequently presented. By investigating state-of-the-art of time-domain modal parameter estimation methods for time-varying structures and the existing experimental verification systems, major issues and future research directions in this area are finally discussed.