采用流场数值模拟计算方法，计算了横风作用时的垂向气动升力系数、气动横向力系数和侧滚力矩系数，得出各系数与车辆速度和风速之间的变化关系。
Using numerical computation of fluid flow, the coefficients of vertical force, lateral force and rolling moment caused by cross-wind were calculated, which were related to train speed and wind speed.
第3章，本章先对已有的横摇数学模型进行介绍，再详述本文数学模型的选取以及水动力系数的求解问题。
Chapter 3 shows the mathematical model firstly, and then gives the mathematical model of this paper. More details on hydrodynamic coefficients and solving problems.
第3章，本章先对已有的横摇数学模型进行介绍，再详述本文数学模型的选取以及水动力系数的求解问题。
Chapter 3 shows the mathematical model firstly, and then gives the mathematical model of this paper. More details on hydrodynamic coefficients and solving problems.
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