【摘要】 针对当下液压减振器中节流阀片变形在复杂受力情况下难以准确计算的问题,以某型高铁抗蛇形减振器结构为基础,利用有限单元法、液压流体力学以及弹性力学基本原理,通过研究减振器的速度以及示功特性,实现减振器外特性计算机仿真的目的。首先,建立了减振器的数学模型,然后结合弹性力学以及有限单元法对阀片变形进行计算,最后通过对数学模型加载正弦激励信号得到减振器的速度特性曲线以及相应的示功图。仿真及试验结果表明:所建立的数学模型以及阀片变形计算方法是准确合理的,对减振器的精确建模、缩短减振器的研发周期与降低研发成本具有重要意义。更多还原

【Abstract】 Based on the structure of a high-speed rail anti-snake damper and uses the finite element method,hydraulic fluid mechanics,and elastic mechanics to solve the problem that the throttle plate deformation in hydraulic shock absorbers is difficult to calculate accurately under complex stress conditions. The basic principle is to realize computer simulation of the external characteristics of shock absorber by studying the speed and power characteristics of shock absorber. Firstly,the mathematical model of shock absorber was established. Then elastic mechanics and finite element method is used to calculate the deformation of throttle plate. Finally,the sine excitation signal is applied to the mathematical model to obtain the speed characteristic curve of shock absorber and the corresponding power chart. Simulation and test results show that the established mathematical model and the method for calculating the deformation of throttle plate are accurate and reasonable. It is of great significance to accurately model the shock absorber、shorten the research and development cycle of shock absorber、reduce the cost of research and development.更多还原