挤压剪切混合模式磁流变悬置特性分析

Characteristic Analysis of Magnetorheological Mount in Squeeze-Shear Mixed Mode

现有混合模式磁流变悬置是通过励磁线圈一对一实现的,只是工作模式的简单叠加,并没有真正实现模式的混合。针对这一问题,提出一种新型混合模式的磁流变液压悬置。悬置的阻尼通道和轴线形成一定的夹角,使得磁流变液在一个阻尼通道里同时具备挤压和剪切工作模式。根据流体理论建立挤压剪切混合模式磁流变悬置力学模型;采用有限元法分析了内部结构参数和外部激励对通道内磁感应强度及阻尼力的影响规律。仿真结果表明,可通过调整结构参数和外部激励有效提高通道内磁感应强度及阻尼力以提高悬置的隔振性能,为动力总成领域研究提供参考。

The current mixed mode magnetorheological(MRF)mounting is realized by the excitation coil one on one,which is only the simple superposition of the working modes,but does not really realize the mixing of the modes.To solve this problem,a new MRF mount of mixed mode is proposed.A certain angle is formed between the damping channel and the axis of the mount,so that the MRF has both squeeze and shear working modes in a damping channel.Based on fluid theory,the mechanical mode of squeeze-shear MRF mount is established.The effects of internal structure parameters and external excitation on magnetic induction intensity and damping force in the channel are analyzed by finite element method.The simulation results show that the magnetic induction intensity and damping force in the channel can be effectively improved by adjusting the structure parameters and external excitation so as to improve the vibration isolation performance of the mount,which provides a reference for the research of powertrain.