平面闸门行走支承滑动摩擦系数计算方法

为了解决平面闸门行走支承滑动摩擦系数计算方法问题,提出了基于黏着理论的滑动摩擦系数计算方法,并将滑动摩擦问题转化成接触面之间的犁沟效应和黏着效应.其中硬材料表面粗糙峰被简化为圆锥体,顶峰的高度在均值附近呈现正态随机分布,应用此随机平面模型对软硬材料之间的犁沟效应进行分析.另外采用"鹅卵石"模型计算黏着效应.此公式在计算摩擦系数与相对滑动速度之间的变化关系时与前苏联学者Крагепьский等提出的变化趋势非常相似,此外其结果还与丁华东等所做的试验结果近似.另外钢对钢、钢对青铜以及钢基铜塑复合材料对不锈钢的摩擦系数随着速度变化的数值与《水利水电工程钢闸门设计规范》(SL74—95)中规定的摩擦系数变化范围很接近.因此证明所提出的公式在计算行走支承滑动摩擦系数时具有一定的可靠性.

Sliding-Friction Coefficient Calculation Method of Plane-Gate Walk Supporting

In order to solve the problem of calculation method of sliding-friction coefficient of the plane-gate walk supporting, a calculation method of the sliding-friction coefficient was proposed on the basis of adhesion theory, and the problem of sliding friction was converted into furrows and adhesion effect which were between the contact surfaces. The hard material surface roughness peaks were simplified to the cone. The height of the peaks showed the normal random distribution. The random-plane-model was applied to analyze the effect of the furrows between the soft and hard materials, and the ＂cobblestone＂ model was applied to calculate the adhesion effect. The friction coefficient changing with the relative sliding velocity was calculated by the calculation method, and the result was very similar to those proposed by KparenbcKn~ and Ding Huadong. The range of friction coefficient between steel and steel, between steel and bronze and between steel-based copper-plastic composite material and stainless steel was very close to that specified by Specifications for Load Design of Hydraulic Structures （SL74-95）. So the calculation method is reliable when calculating the sliding friction coefficient of the plane-gate walk supporting.