复合结构磁流变减振器设计与特性分析

Composite Structure Design and Behavior Research of Magmetorheological Damper

当磁流变减振器半主动功能失效时,为保持其阻尼性能仍具一定的自调节性或实际路况不需无级调节时,节省不必要的能耗,提出用于车辆半主动悬挂系统的被动与半主动功能自动切换的复合结构磁流变减振器。针对其复合结构,根据磁流变流体的本构方程、流体力学和电磁场理论建立阻尼特性模型和可控性能模型,并应用磁流变特性将复杂的阻尼性能模型进行简化以利于结构设计,同时依据优化设计方法实现了半主动和被动结构的协调一致。以实例仿真分析验证了其可控性能。

Keeping the self-adjusting of damping behavior when the controllability of semi-active damping is disable, or saving the unnecessary energy when the continuous modulation of damping is not needed, the composite structure for self-shifting between passive and semi-active structure is presented. After damping dynamic model and controllable model for the composite structure are established according to the constitutive equation of magnetorheologcal-fluid, fluid mechanics and electromagnetism, the complex damping model is simplified utilizing magnetorheological behavior for structure design, and harmonization of semi-active structure and passive structure can be realized by using optimal design. Finally the controllability of composite structure was analyzed and the usefulness of simplification was verified by simulation.