### 金属橡胶-钢丝绳索型减摆阻尼器动力学建模与参数识别

1. 军械工程学院 自行火炮教研室, 河北 石家庄 050003
• 收稿日期:2005-06-05 修回日期:2005-12-10 出版日期:2006-12-25 发布日期:2006-12-25

### Dynamic Modeling and Parameter Identification of Metal Rubber-Steel Wire Shimmy Damper

LI Dong-wei, BAI Hong-bai, YANG Jian-chun, LIU Ying-jie, HOU Jun-fang

1. Faculty of Self-Propelled Gun, Ordnance Engineering College, Shijiazhuang 050003, China
• Received:2005-06-05 Revised:2005-12-10 Online:2006-12-25 Published:2006-12-25

Abstract: A metal rubber-steel wire shimmy damper of helicopter rotor is developed. Firstly, the bilinear hysteresis model with non-symmetry elastic storing forces and viscous damping is established refering to the force-displacement hysteresis curve of the shimmy damper. At the same time the nonlinear model is linearized by the Fourier series expansion. Secondly, the separating-parameter identification arithmetic is presented based on the geometrical symmetry relationship of each restoring force component in the force-displacement hysteresis curve. To prove the credibility of the separating-parameter identification arithmetic, a bilinear hysteretic simulation element with non-symmetry cubicre elastic storing forces and viscous damping is established. Simulation result shows that the arithmetic has high fitting accuracy and noise proof feature. Finally, when the shimmy damper system is excited by the sine displacement load whose amplitude is 3.2 mm and frequency is 3 Hz, the calculation results show that the model and identification arithmetic can be used in practical application.