双粗糙表面滑动过程不同条件对Z向速度的影响分析

Analysis of the Velocity in Z Direction in Sliding Model of Double Rough Solids

采用W-M函数建立具有分形特征的三维双粗糙面接触模型,在滑动速度、法向载荷及界面剪切强度等各种因素的相互作用下,动态探讨了粗糙体在滑动过程中的摩擦磨损情况。运用有限元方法对滑动过程进行模拟仿真,对Z向速度在各种因素作用下的变化规律进行分析,结果显示滑动速度较小情况下,Z向速度振幅较小;较小法向载荷情况下,Z向速度的振幅较大;界面剪切强度较小情况下,Z向速度的振幅较大。从功率谱看,较小界面剪切强度下摩擦振动变化比较强烈,而相应的所需要能量比较小。将这些结果与相关文献或实验进行比较,得出模拟仿真的合理性,同时通过研究法向载荷、滑动速度、界面剪切强度等工况参数对摩擦振动的影响,以期为摩擦学设计和摩擦材料的制备提供理论参考。

A three-dimensional W-M fractal sliding model of double rough surfaces was established, and considering the factors of interface shear strength influenced the whole sliding process. The velocity in Z direction of sliding processes was analyzed using the finite element analysis take into account adhesion factors in the process of contact. The analysis and simulation identified that the sliding speed is smaller, the amplitude of velocity in Z direction is smaller; the normal load is smaller, the amplitude of velocity in Z direction is larger; the interface shear strength is smaller, the amplitude of velocity in Z direction is larger, and the corresponding energy of overcome the vibration is smaller, but the frequency of vibration is relatively severe. Compared with experimental results or mature friction wear theory, it is concluded that the rationality of the simulation, these consequences will hopefully provide theoretical references to tribology design.