扭振减振器动态试验研究

摘要

The torsion fatigue testing machine is used as the experimental platform to study the dynamic working characteristics of the torsional vibration damper. The positive/inverse Fourier transform method is adopted to analyze the data obtained from the dynamic test of the damper. The dynamic working characteristic curves of the torsional vibration damper with different frequencies and amplitudes are revealed from the analyses. Based on that, the linearization process is conducted on the damping of the damper. Experimental results show that dynamic performance of the damper is not only related to the vibration amplitude, but also to the exciting frequency. Furthermore, the damper has typical nonlinear hysteretic characteristics.%为研究扭振减振器的动态工作特性,以扭转疲劳试验机为试验平台,运用正/逆傅里叶变换法对获得的试验数据进行分析处理,得到了扭振减振器在不同频率、不同振幅下的动态工作特性曲线,在此基础上对减振器阻尼进行线性化处理。研究发现：减振器恢复扭矩与频率、振幅有关,具有典型的迟滞非线性特性,其阻尼系数与振幅、频率之间成复杂的曲面关系。