摘要
本文编制了模态参数时域识别的双最小二乘法程序,并进行了模拟试验。试验结果表明:使用双最小二乘法识别阻尼系数优于使用单最小二乘法,同时振型和固有频率的识别精度不会降低。利用某动平衡试验装置前端转子系统的横向振动的自由响应数据,对横向振动的固有频率、振型和阻尼系数进行了识别。得出的固有频率值与振动自由响应的谱分析得到的固有频率值极为接近。
A practical procedure of Double-Least-Square approach in ITD method of modal parameters is programed and the simulataneous identification test is conducted. The test results show that the Double-Least-Square approach is better than Single-Least-Square approach in the identifieation of damping factors. Using the free-response records of the rotor of a balancing test maehine, the procedure can identify the natural frequency, vibrational models and darning faestr of the transverse vibration.
出处
《振动与冲击》
EI
CSCD
北大核心
1990年第4期26-33,共8页
Journal of Vibration and Shock
