Investigation to improve hunting stability of railway carriage using semi-active longitudinal primary stiffness suspension
Investigation to improve hunting stability of railway carriage using semi-active longitudinal primary stiffness suspension
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发表时间：
2010
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通讯作者：
K. Abood;R. A. Khan
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作者：
K. Abood;R. A. Khan
建立了考虑轮轨单点接触和两点接触的直线轨道上的列车模型，推导了相应的运动方程。该模型由31个自由度组成，分别控制轮对的垂向位移、侧向位移、侧倾角和横摆角，车体和转向架的垂向位移、侧向位移、侧倾角、俯仰角和横摆角。为列车模型提供了一、二系悬挂的线性刚度和阻尼参数。采用线性Kalker理论和非线性启发式模型相结合的方法计算轮轨接触区的蠕滑力。采用四阶龙格-库塔法对控制运动微分方程进行了计算机仿真。应用极限环原理和相平面法研究了系统的稳定性，并计算了系统的临界蛇行速度。数值仿真模型用于描述特定车轮锥度和悬挂特性参数下的车厢部件的动态响应。纵向主刚度悬架采用带横向位移指示器的半主动悬架控制。为了提高车辆蛇行临界速度，改善蛇行稳定性，研究了可控半主动纵向一系悬挂。
Railway carriage model moving on tangent tracks is constructed by deriving the associated equations of motion where single-point and two-point wheel-rail contact is considered. The railway carriage is modeled by 31 degrees of freedom which govern vertical displacement, lateral displacement, roll angle and yaw angle of wheelset whereas vertical displacement, lateral displacement, roll angle, pitch angle and yaw angle of carbody and each of two bogies. Linear stiffness and damping parameters of primary and secondary suspensions are provided to the railway carriage model. Combination of linear Kalker's theory and nonlinear heuristic model is adopted to calculate the creep forces in which introduced at wheel and rail contact area. Computer aided-simulation is constructed to solve the governing differential equations of motion using Runge-Kutta fourth order method. Principles of limit cycle and phase plane approach is applied to study the stability and evaluate critical hunting velocity of the system. The numerical simulation model is used to represent dynamic responses of the components of railway carriage subjected to specific parameters of wheel conicity and suspension characteristics. Longitudinal primary stiffness suspension is controlled using semi-active suspension with lateral displacement indicator. The controlled semi-active longitudinal primary suspension is examined to increase the critical hunting velocity and improve hunting stability of railway carriage.