1.沈阳航空航天大学 航空发动机学院,沈阳 110136
2.辽宁省航空推进系统先进测试技术重点实验室,沈阳 110136
3.中国航发南方工业有限公司,株洲 412002
ZHOU Hailun, E-mail: hlzhou@sau.edu.cn
收稿:2024-02-26,
修回:2024-04-20,
纸质出版:2026-02-15
移动端阅览
周海仑,韩云龙,张明,等. 基于经验小波变换的静偏心挤压油膜阻尼器动力特性参数识别[J]. 机械强度,2026,48(2):80-87.
ZHOU Hailun,HAN Yunlong,ZHANG Ming,et al. Parameter identification of dynamic characteristics for static eccentric squeeze film damper based on empirical wavelet transform[J]. Journal of Mechanical Strength,2026,48(2):80-87.
周海仑,韩云龙,张明,等. 基于经验小波变换的静偏心挤压油膜阻尼器动力特性参数识别[J]. 机械强度,2026,48(2):80-87. DOI: 10.16579/j.issn.1001.9669.2026.02.010.
ZHOU Hailun,HAN Yunlong,ZHANG Ming,et al. Parameter identification of dynamic characteristics for static eccentric squeeze film damper based on empirical wavelet transform[J]. Journal of Mechanical Strength,2026,48(2):80-87. DOI: 10.16579/j.issn.1001.9669.2026.02.010.
目的
2
针对静偏心挤压油膜阻尼器(Squeeze Film Damper
SFD)产生的周期时变动力特性识别难题,提出一种高精度的参数识别方法。
方法
2
首先,将经验小波变换(Empirical Wavelet Transform
EWT)应用于静偏心SFD的动力特性识别中;然后,利用EWT自适应划分信号频谱,提取具有紧支撑傅里叶频谱的有效调幅-调频分量,并结合最小二乘法求解系统的时变刚度与阻尼参数。
结果
2
仿真分析表明,所提方法能够准确识别单自由度质量-弹簧系统的时变动力学参数。通过对SFD双向激励试验数据的处理,成功获取了阻尼器随周期变化的刚度与阻尼特性。研究证明,所提EWT方法可以有效支撑SFD的优化设计与动力学评价。
Objective
2
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
2
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
2
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.
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