摘要
提出了一种基于圆盘挤压模式的小位移磁流变液阻尼器模型,得出了挤压流动的微分方程,建立了Navier边界滑移条件和边界相容条件;利用双粘度本构模型,推导出挤压作用下不同位置的径向速度分布、径向压力分布,确定了牛顿流动区和宾汉流动区的分界面,计算了随着外加电流变化的圆盘挤压力的数学表达式。为了验证理论推导的正确性,按照发动机隔振系统的技术要求,设计制造了基于圆盘挤压模式的小位移磁流变液阻尼器,利用MTS8701电液伺服激振控制台进行了测试。结果表明:得出的试验阻尼力与理论阻尼力基本符合,采用提出的分析方法来计算圆盘挤压力是可行的,该方法对挤压模式的磁流变液阻尼器设计有一定的参考价值。
A kind of small displacement magnetorheological fluid（MRF） damper model based on the disk squeeze mode was put forward.The differential equation of squeeze flow was obtained.Navier boundary slip condition and boundary compatible condition were established.Radial velocity and radial pressure distributions of different locations under extrusion were derived from dual-viscosity constitutive model.The interface between Newtonian flow area and Bingham flow area was determined.The mathematical expression of squeeze pressure between two disks changed with the current was calculated.In order to verify the correctness of theoretical deduction,a kind of small displacement MRF damper based on the disk squeeze model was designed in accordance with the technical requirements of engine vibration isolation system.The test of MTS8701 electro-hydraulic servo excitation console was carried out.Results show that the experimental damping force is in accordance with the theoretical value.The analytical method proposed in this paper which is used to calculate the disk squeeze pressure is feasible and has the reference value to design of MRF damper based on squeeze mode.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2010年第4期107-112,共6页
China Journal of Highway and Transport
基金
国家自然科学基金项目(50975298)
重庆市科技攻关项目(2009AC3079)
重庆市自然科学基金项目(2009BB3353)
中国博士后科学基金项目(200902287)
关键词
汽车工程
磁流变液阻尼器
宾汉模型
圆盘挤压模式
automotive engineering
magnetorheological fluid damper
Bingham model
disk squeeze mode
