模拟型电空阀非线性动力学研究  

Study on Nonlinear Dynamics of Analog Electro-pneumatic Valve

作　　者：崔锦涛 庄会华 郭毅 CUI Jintao;ZHUANG Huihua;GUO Yi(School of Locomotive and Rolling Stock,Kunming Railway Vocational and Technical College,Kunming 650000,China)

机构地区：[1]昆明铁道职业技术学院机车车辆学院,昆明730070

出　　处：《机械工程师》2025年第2期21-25,共5页Mechanical Engineer

基　　金：云南省教育厅2023年度科学研究基金(2023J1917)。

摘　　要：针对动车组制动系统中的电空变化阀,分析了模拟型电空阀的结构特点和工作原理,参照单自由度振动碰撞模型建立了模拟型电空阀非线性动力学模型,分析了模拟型电空阀三态时的供给阀、阀座、给排活塞杆之间的非线性因素,对该系统动力学模型进行无量纲化处理,以频率比为主要研究参数对模型进行数值求解并分析了频率比变化时的幅值响应。同时分析了刚度比、阻尼对电空阀振动特性的影响。并对该系统绘制了分岔图、Poincaré截面图、相平面图,分析表明:频率比在0.1~10.0变化范围内,系统混沌运动呈周期性规律出现;当系统处于混沌状态下,刚度比、阻尼比的增大均有利于系统经由混沌进入周期运动。Aiming at the electro pneumatic change valve in the braking system of electric multiple unit(EMU),the structural characteristics and working principle of the analog electro pneumatic valve are analyzed.The nonlinear dynamic model of the analog electro pneumatic valve is established by referring to the single degree of freedom vibration collision model.The nonlinear factors among the supply valve,valve seat,and supply and exhaust piston rod of the analog electro pneumatic valve in three states are analyzed.The frequency ratio is used as the main research parameter to numerically solve the model and analyze the amplitude response when the frequency ratio changed.At the same time,the influence of stiffness ratio and damping on the vibration characteristics of electro-pneumatic valves is analyzed.The bifurcation diagram,Poincarésection diagram and phase plane diagram are drawn for the system.The analysis shows that the chaotic motion of the system appears periodically when the frequency ratio is in the range of 0.1-10.When the system is in a chaotic state,an increase in stiffness ratio and damping ratio is beneficial for the system to enter periodic motion through chaos.

关 键 词：电空阀 动力学 非线性 数值分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]