Parameter identification of dynamic characteristics for static eccentric squeeze film damper based on empirical wavelet transform
ZHOU Hailun
HAN Yunlong
ZHANG Ming
CAO Gangyi
Abstract：[Objective]Aiming at the periodic time-varying dynamic characteristics of static eccentric squeeze film dampers(SFD),a parameter identification method based on empirical wavelet transform(EWT)is proposed.[Methods]The EWT method was applied to identify the dynamic characteristics.The signal spectrum was adaptively divided to extract effective amplitude-modulation-frequency-modulation components with tightly supported Fourier spectra.Subsequently,the required time-varying stiffness and damping parameters were solved using the least squares method.[Results]Simulation results show that the proposed method accurately identifies the time-varying parameters of a single-degree-of-freedom system.Application to test data from bidirectional excitation tests of SFD demonstrates that the time-varying stiffness and damping parameters are captured more precisely.This method provides an effective approach for the design and optimization of squeeze film dampers.
Keywords：Squeeze film damperParameter identificationEmpirical wavelet transformDynamic characteristicsStatic eccentricity
Publication Date：2026-02-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 80-87 )