一种硅油扭振阻尼器的非线性动力学特性研究

中科院力学所, 北京100080;西安交通大学建筑工程与力学学院, 西安710049;2. 西安交通大学建筑工程与力学学院, 西安710049;3. 西安交通大学化工学院, 西安710049

详细信息

STUDY ON THE NON-LINEAR DYNAMIC CHARACTERISTICS OF A TYPE OF TWISTING SILICON-OIL DAMPER

Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080;School of Civil Engineering and Mechanics, Xi'an Jiaotong University Xi'an, 710049;2. School of Civil Engineering and Mechanics, Xi'an Jaotong University, Xi'an, 710049;3. School of Chemical Engineering, Xi'an Jiaotong University, Xi'an, 710049

摘要: 本文提出一种利用Cohen类二次时频分布和Hilbert变换,由非平稳振动信号对非线性动力学系统进行辨识的方法,利用该方法对一种硅油扭振阻尼器进行了实验研究,得到了阻尼器的阻尼系数随转速的变化曲线及附加刚度随转角的变化曲线,揭示了阻尼器的非线性动力学特征。该方法仅需利用一次冲击响应信号,实验工作量小,抗噪性好,适用性广泛。
- 阻尼器 /
- Cohen类二次时频分布 /
- 非平稳振动 /
- 非线性动力学系统 /
- Hilbert变换
Abstract: The quadratic time-frequency distribution and Hilbert transform is used to analyze the non-linear dynamic characteristics of a type of twisting silicon-oil damper. The damping coefficient and the twisting stiffness are determined. It is shown that the present method is robust and noiseproof as well as effort-saving.
- damper /
- quadratic time-frequency distribution of Cohen class /
- non-stationary vibration /
- non-linear dynamic system /
- Hilbert transform