响应面法用于磨机传动系统扭转振动模型修正

Torsional Vibration Model Updating for the Mill Transmission System Based on Response Surface Method

大型设备传动系统的扭转振动影响系统的正常工作,严重时会导致系统损坏,避免共振是缓解扭转振动的有效手段,针对此问题,以某大型磨机设备为研究对象,建立以响应面法的有限元模型修正理论为基础的方法。通过扭转振动分析,经显著参数筛选,以显式的响应面模型逼近特征量与设计参数间复杂的隐式函数,对传动系统有限元模型可能存在的误差进行修正。在获得较精确模型的基础上,对其传动系统进行了基于响应面的优化设计,调整系统的模态频率,使其有效避开了系统的工作频率,实现了传动系统的优化,表明以响应面法的有限元模型修正方法对传动系统设计具有参考价值。

The torsional vibration of a large equipment transmission system affects its normal operation and even leads to serious damage. An effective means to relieve the torsional vibration is avoiding resonance. A large mill equipment was targeted, and its transmission system was analyzed based on the revising theory of the finite element model (FEM) of the response surface. A response surface model was built to approach the complicated implicit function of the characteristic quantity and design parameters. After choosing the significant parameters, the probable errors existing in the FEM model of the system were revised. Then, the transmission system was optimized based on the new FEM, and its modal frequency was adjusted to avoid the working frequency by updating the FEM. Finally, the optimization of the transmission system was achieved, which indicates that this method can guide the design of the transmission system. © 2016, Editorial Department of JVMD. All right reserved.