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首页> 外文期刊>Proceedings of the institution of mechanical engineers >3D dynamic model of the railway wagon to obtain the wheel-rail forces under track irregularities
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3D dynamic model of the railway wagon to obtain the wheel-rail forces under track irregularities

机译：铁路货车的3D动态模型以获取轨道不平顺下的轮轨力

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Employing a dynamic model of the railway wagon in three dimensions, this paper presents the results of dynamic wheel-rail forces under the presence of track irregularities. A mathematical model of the wagon system is developed using dynamic equations of the components, taking into account the vertical (bounce), pitch and roll motions of the system. The model examines the dynamics of the wagon system under arbitrary rail irregularities. The spectra of rail surface irregularities are fed into the vehicle model to extract the time histories of dynamic forces between the wheel and the rail. Using the irregularity spectra of left/right rails, vibration of the wheelsets is studied for the bounce-roll motions. The dynamic contact forces between wheels and rails are determined for three examples of the measured irregularities. Moreover, three V-shape defects are modelled as examples of the singular defects on rail surface. The results of dynamic simulations confirm the large amounts of impact forces due to the presence of rail irregularities, particularly for the cases with much unevenness between the left/right profiles.
机译：运用三维动态模型，提出了在存在轨道不平顺的情况下轮轨动力的结果。考虑到系统的垂直（弹跳），俯仰和横滚运动，使用部件的动力学方程式开发了货车系统的数学模型。该模型检查了任意轨道不规则情况下货车系统的动力学。将轨道表面不规则性的光谱输入到车辆模型中，以提取车轮和轨道之间的动态力的时间历史。使用左右轨道的不规则光谱，研究轮对的振动，以了解弹跳运动。对于所测量的不规则性的三个示例，确定车轮和轨道之间的动态接触力。此外，将三个V形缺陷建模为钢轨表面上的奇异缺陷的示例。动态模拟的结果证实了由于轨道不平整的存在而产生的大量冲击力，特别是对于左右轮廓之间不平整的情况。

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