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铁道车辆临界速度新的研究方法，是将线性动力响应分析方法扩大应用到非线性多体系统中。本文阐述了上、下心盘面的干摩擦力特性及轮对和转向架水平约束参数对临界速度的影响。通过改善车体及转向架间的约束，可明显提高铁道车辆的临界速度。
A new research method of critical speed of railway vehicles is to expand the linear dynamic response analysis method to nonlinear multi-body system. In this paper, the characteristics of the dry friction of the upper and lower core surfaces and the influence of the horizontal constraint parameters of wheelsets and bogies on the critical speed are described. By improving the constraints between the car body and the bogie, the critical speed of railway vehicles can be obviously increased.