油气分离式弹簧系统的建模与特性分析

发布时间：2018-06-19 13:11

本文选题：汽车工程 + 油气弹簧　；参考：《中国公路学报》2016年11期

【摘要】：为了研究工程车辆油气分离式弹簧系统的频率特性,在分析油气分离式油气弹簧结构和工作原理的基础上,建立了油气分离式油气弹簧的阻尼和刚度模型,结合螺旋弹簧的刚度模型,获得了油气分离式弹簧系统的垂向非线性数学模型。采用傅里叶级数展开、泰勒展开、等效能量法和L-P法相结合的方法获得了油气分离式弹簧系统的等效阻尼系数、等效刚度及强迫振动的稳态解;同时进行了油气分离式弹簧系统性能试验,分析了油气分离式弹簧系统固有频率和幅频响应的影响因素。结果表明:油气分离式弹簧系统固有频率随氮气储能器初始压力的增大呈非线性减小的趋势,随螺旋弹簧圈数和螺旋弹簧旋绕比的增大呈弱非线性减小的趋势,随活塞杆及组件质量和螺旋弹簧压缩量的增大呈非线性增大的趋势;频率比小于0.75时对油气分离式弹簧系统位移的幅频特性影响较小,频率比在0.75~2之间时容易引起油气分离式弹簧系统共振,频率比大于2时有利于油气分离式弹簧系统实现减振;试验结果与理论分析结果较为吻合,说明了该模型建立和求解的合理性。
[Abstract]:In order to study the frequency characteristics of the oil and gas separation spring system of the engineering vehicle, based on the analysis of the structure and working principle of the oil and gas separation type oil and gas spring, the damping and stiffness model of the oil and gas separation type oil and gas spring is established, and the vertical nonlinear mathematical model of the oil and gas separation spring system is obtained by combining the stiffness model of the spiral spring. Using Fourier series expansion, Taylor expansion, the equivalent energy method and L-P method, the equivalent damping coefficient, the equivalent stiffness and the steady state solution of the forced vibration are obtained. At the same time, the performance test of the oil and gas separation spring system is carried out, and the natural frequency and amplitude frequency response of the oil and gas separation spring system are analyzed. The results show that the natural frequency of the oil and gas separation spring system decreases linearly with the increase of the initial pressure of the nitrogen accumulator, and decreases with the increase of the spiral spring coil number and the spiral spring winding ratio. It increases nonlinear with the mass of the piston rod and the component of the component and the compression of the spiral spring. The frequency ratio less than 0.75 has less influence on the amplitude frequency characteristics of the displacement of the oil and gas separation spring system. The frequency ratio is easy to cause the resonance of the oil and gas separation spring system when the frequency is between 0.75~2 and the frequency ratio is greater than 2, which is beneficial to the vibration damping of the oil and gas separation type spring system, and the experimental results are in good agreement with the theoretical analysis results, indicating the model. The reasonableness of the establishment and solution of the type.
【作者单位】：南京航空航天大学机电学院;盐城工学院汽车工程学院;
【基金】：国家自然科学基金项目(51375230) 江苏省六大人才高峰D类项目(XNYQC-005)
【分类号】：U463.334.3

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