The shape irregularity of sand grains leads to eccentric distances in grains, and their variant positions when they begin to move results in the diversity of eccentric angle.
沙粒形状的不规则性使得沙粒的质心存在着偏心距，且沙粒所处位置的不同使其偏心角各异。
The influence of train running speed, wheel-rail friction coefficient, vehicle load, track geometric irregularity, partly load, gauge and the shape of wheel tread on derailment was emphasized.
论文重点分析了车辆运行速度、轮轨摩擦系数、车辆载重、轨道几何不平顺、偏载、轨距大小、车轮踏面形状等因素对脱轨的影响。
The plastic deformation would more easily occur due to the impact contact, but it is independent to the shape of tread. However, to eliminate the irregularity between the wheel and rail is necessary.
碰撞接触容易引起塑性变形，这种变形与踏面形状无关，应注意消除轮轨间的不平顺。
The plastic deformation would more easily occur due to the impact contact, but it is independent to the shape of tread. However, to eliminate the irregularity between the wheel and rail is necessary.
碰撞接触容易引起塑性变形，这种变形与踏面形状无关，应注意消除轮轨间的不平顺。
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