摘要
基于液压减振器的工作原理、内部结构和阀元件的性能,建立了一个新的液压减振器数值模型。该数值模型不仅将阻尼力作为减振器活塞杆的速度与位移的函数,同时还含有用于描述内部结构的基本参量,可以清楚地描述液压减振器的阻尼机制。应用该模型可进行液压减振器的动态性能分析、结构设计、元件选用等。模型计算结果与实验数据有较好的符合性。该数值模型易于实现计算机数值仿真,可以应用于车辆系统动力学性能的研究和减振器的结构参数、动态性能对车辆舒适性和稳定性影响的深入分析。
The paper studies a new numerical model of the hydraulic shock absorber, based on its working principle, elements construct and valves behaviours. The physical damper models of damping valves and intake valves are built. The oil flows in the working chambers and reservoir can be calculated as the result from the solutions of the differential equations. The leakage between the piston and the inner tube and between the piston rod guide and the piston rod is modeled by the flow equations for an annulus. The stiffness of the rubber attachment is modeled. The pressures of the damper are modeled to describe the dynamic behaviors of the damper by a set of differential equations. The new numerical damper model identifies the damp force as the function of the displacement and velocity of the piston rod in relation to the damper body, and the resulting damper force is directly related to the various parameters, which have a physical meaning of damper construction. The model can expatiate on the damper working principle, and be used to analyze dynamical behaviors of the damper, design new damper constructs and select valve elements. The model is validated by test measurement very well. The new damper model can be simulated by computer, and used in vehicle system dynamics research, to study the relationship between construct parameters and stability and comfortbility of railway vehicles.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2005年第2期28-34,共7页
Journal of the China Railway Society
基金
铁道部科技研究项目(2002YF15)
铁道科学研究院和SACHS汽车零部件系统(上海)有限公司合作研究项目
