MR阻尼器的简化参数模型及其应用

MR阻尼器应用于控制风振、地震等引起的随机振动时需用参数化表达式来描述MR阻尼器简化的力学模型 ,从而更好地揭示MR阻尼器的减振机理。本文采用偏最小二乘法误差估计、Chebyshev多项式拟合建立了MR阻尼器简化模型的参数化表达式 ,并应用于斜拉索振动控制中 ,为合理选择MR阻尼器提供了便捷、可靠的手段

Simplified Polynomial Model of MR Damper and Its Application

Based on equivalent RMS structural deflection criteria, the simplified model is established for MR damper used in passive control. The model captures the salient features of MR dampers′ mechanical performance. For mitigating vibration caused by wind or earthquake, polynomial parametric representation of MR damper based on above model is need. The mechanical performance of MR dampers is related to the applied voltage, displacement amplitude and frequency.Using partial least squares in conjunction with the chebyshev polynomial respresentation, the expression for the simplified model is built, and is provided to determine the optimal MR damper. The modal damping of cable with MR dampers can be evaluated directly by using the existent universal estimation curve for estimating modal damping of cable with discrete viscous dampers. Then vibration mitigation of the cable using MR dampers is simulated.