【作者】 岳子扬； 李以农； 吴欢； 郑玲；

【Author】 Yue Ziyang;Li Yinong;Wu Huan;Zheng Ling;College of Mechanical and Vehicle Engineering,Chongqing University;

【机构】 重庆大学机械与运载工程学院；

【摘要】 在磁流变减振器(Magnetorheological Damper,MRD)的结构设计阶段,需要建立精确的准静态模型,通过把静态加载过程变成加载速度慢、惯性力小的动态过程,可以快速得到近似的结果,从而来预测其阻尼特性使MRD满足车辆的减振需求。传统准静态建模方法假设在阻尼通道内磁流变液(Magnetorheological Fluid,MRF)的剪切屈服应力是处处相等的,这对于MRD尤其是全通道有效MRD的准静态建模会带来很大的误差。为了解决上述问题,提出了一种考虑MRF屈服应力随阻尼通道位置变化的准静态建模方法,以提高MRD准静态模型的精度。利用Tkagi-Sugneo模糊神经网络得到了屈服应力与阻尼通道位置变化之间的线性化关系,进而得到更加准确的黏性阻尼力,从而建立考虑MRF屈服应力随阻尼通道位置变化的准静态模型。以两种不同的全通道有效MRD为研究对象,通过电磁有限元仿真分析阻尼通道内磁场强度的分布情况,最后通过电磁有限元仿真和阻尼特性试验验证了该新型准静态模型比传统Bingham准静态模型具有更高的阻尼特性预测精度。更多还原

【Abstract】 In the structural design stage of a magnetor-heological damper(MRD),an accurate quasi-static model is required.By turning the static loading process into a dynamic process with slow loading speed and small inertial force,an approximation of the results can be obtained quickly to predict the damping characteristics so that the MRD can meet the vibration damping requirements of the vehicle.The traditional quasi-static modeling method assumes that the shear yield stresses of magnetorheological fluid(MRF) in the damping channel are equal everywhere,which brings great errors for the quasi-static modeling of MRDs,especially for full-channel effective MRDs.In order to solve the above problem,a quasi-static modeling method that takes into account the variation of MRF yield stress with the position of the damping channel is proposed to improve the accuracy of the quasi-static modeling of MRDs.The linearized relationship between the yield stress and the variation of the damping channel position is obtained using the Tkagi-Sugneo fuzzy neural network,which leads to a more accurate viscous damping force,and thus to a quasi-static model that considers the variation of the MRF yield stress with the damping channel position.The distribution of magnetic field strength in the damping channel is analyzed by electromagnetic finite element simulation with two different full-channel effective MRDs as the research object,and finally the new quasi-static model is verified to have a higher prediction accuracy of the damping characteristics than that of the traditional Bingham quasi-static model through the electromagnetic finite element simulation and the damping characteristics test.更多还原