全通道有效磁流变减振器的自适应分段准静态建模  

Adaptive segmental quasi-static analysis of all-channel effective magnetorheological dampers

作　　者：顾三宝 李以农[1] 吴欢 郑玲[1] GU Sanbao;LI Yinong;WU Huan;ZHENG Ling(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆大学机械与运载工程学院,重庆400030

出　　处：《振动与冲击》2024年第12期212-220,259,共10页Journal of Vibration and Shock

基　　金：重庆市研究生科研创新项目(CYB21011)。

摘　　要：全通道有效磁流变减振器(magnetorheological damper,MRD)阻尼通道中磁流变液的剪切屈服应力会随位置的变化而变化,在MRD结构设计阶段,常采用准静态模型来表示MRD结构尺寸与阻尼力的关系,并预测减振器的输出阻尼力。传统准静态模型通常假设磁流变液在阻尼通道内的剪切屈服应力处处相等,模型精度低且不符合全通道有效MRD磁路特点。基于上述问题,提出了一种新型自适应分段准静态建模方法,考虑了磁流变液剪切屈服应力随阻尼通道位置的变化关系,对阻尼通道的磁场强度先采用整体低阶拟合,根据设置的误差阈值对低阶拟合结果进行0/1状态划分,再完成分段拟合。以两款不同结构的全通道有效MRD为研究对象,通过电磁有限元仿真分析了全通道有效MRD的磁路特点并建立新型准静态模型,最后通过阻尼特性测试试验,验证了该新型准静态模型的合理性与精度。For an all-channel effective magnetorheological damper(MRD),the shear yield stress of magnetorheological fluid in the damping channel will change with the change of position.In the design stage of the MRD structure,aquasi-static model is often used to represent the relationship between the size of the MRD structure and the damping force,and to predict the output damping force of the damper.Traditional quasi-static models usually assume that the magnetorheological fluid's shear yield stress in the damping channel is equal everywhere,so its accuracy is low,which does not conform to the magnetic circuit characteristics of the all-channel effective MRD.Based on the above problems,a novel adaptive segmental quasi-static modeling method was proposed,which considers the relationship between the magnetorheological fluid's shear yield stress and the position of the damping channel.This method first uses the overall low-order fitting for the magnetic field strength of the damping channel and divides the low-order fitting result into 0/1 states according to the set error threshold,completing the segmental fitting at last.Circuit characteristics of all-channel effective MRDs was analyzed by electromagnetic finite element simulation.The novel quasi-static models for two all-channel effective MRDs with different structures were established.Finally,the rationality and accuracy of the novel quasi-static model were verified by a damping characteristic test.

关 键 词：磁流变减振器(MRD) 全通道有效 准静态模型 自适应分段 

分 类 号：TB535.1[理学—物理]