油气悬挂囊式蓄能器气体迟滞环特性分析

为了探究囊式蓄能器内氮气的真实气体多变过程及囊式蓄能器特性,利用蓄能器试验平台开展不同频率的正弦激振试验.试验发现迟滞时间是迟滞环开度的主要因素,而激振频率会影响蓄能器的刚度.在此基础上,提出一种基于体积压缩率和迟滞时间的真实气体多变指数模型,并通过试验数据对模型进行验证.结果表明:仿真预测结果与试验数据的最大误差小于...

The Analysis of the Influence Factors of Hysteresis Loop for Hydro-Pneumatic Suspension System

In order to research the polytropic process of nitrogen in the capsule hydraulic accumulator with bladder and the accumulater characteristics.In this paper research,tests excited by the sinusoidal displacement with different frequencies were carried out on the accumulator experiment platform in order to research the polytropic process of nitrogen in the bladder accumulator and explore the influence factors of hysteresis loop.an attempt was made to explore the influence factors of hysteresis loop by experiment research.Some tests excited by the sinusoidal displacement with different frequencies respectively were carried out on the accumulator rig.A comprehensive analysis of experimental data showed that the existence of hysteresis time determines the opening degree of the hysteresis loop and the excitation frequency affects the system stiffness.Based on the analysis,a novel formula was proposed to build a multivariate index model with the two parameters to which can describe the real gas behavior.In order to verify the correctness and the accuracy of the proposed multivariate index model,and the experimental data are compared with the co-simulation results to verify the accuracy of the proposed multivariate index model.The comparison of results showed that the maximum discrepancy was less than 10%,it further which demonstrated that the proposed multivariate index model can describe the behavior of the real nitrogen in the accumulator accurately.