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为了提高直线电机轮轨交通车辆运行的安全性与乘坐舒适性,分析了车轨结构特征,建立了直线电机车辆/板式轨道横、垂向动力学模型。通过三角级数法得到轨道随机不平顺的时间序列,以其作为系统激励,分析了直线电机车辆与轨道的随机振动特性。把轨道不平顺描述为余弦函数,研究了高低不平顺与方向不平顺的波长和幅值对系统动力响应的影响规律。计算结果表明:磁轨气隙变化的频率主要集中在1.2～2.0Hz范围内,波长小于10m的高低和方向不平顺对系统轮轨作用力、脱轨系数及轮重减载率等影响显著增大,应予以重点控制。
In order to improve the safety and ride comfort of the linear motor rolling stock and the characteristics of the structure, the horizontal and vertical dynamic models of the linear motor vehicle / slab track are established. By using the method of trigonometric series, we can get the random sequence of track irregularities and use it as the system excitation to analyze the random vibration characteristics of linear motor vehicles and orbits. The orbit irregularity is described as a cosine function, and the influence law of the wavelength and the amplitude of the unevenness and the uneven direction on the system dynamic response is studied. The calculation results show that the frequency of air gap changes mainly in the range of 1.2-2.0Hz, the influence of the wheel-rail force, derailment coefficient and wheel load reduction rate is significantly increased when the wavelength is less than 10m , Should be given priority control.