花键约束下变形摩擦片角向摆动的数值分析  

Numerical analysis of a deformed friction disk on the angular tilting under spline constraint

作　　者：薛嘉琪 马彪[1] 郑长松[1] 徐峰[2] 季文龙[2] XUE Jiaqi;MA Biao;ZHENG Changsong;XU Feng;JI Wenlong(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;The PLA 32184 Unit,Beijing 100071,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中国人民解放军32184部队,北京100071

出　　处：《哈尔滨工程大学学报》2024年第5期947-956,共10页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51975047,51775045)。

摘　　要：为了揭示离合器分离状态下摩擦元件变形前后的动力学特性差异,本文研究了花键约束下不同变形程度摩擦片的角向摆动特性,分析了花键界面和翘曲变形对摆动的影响。本文对平直摩擦片进行了力学分析,并建立了平直片角向摆动的动力学模型。在此基础上,对平直片引入薄板的变形函数,考虑几何差异推导出了变形摩擦片的摆动模型。同时,与经典边界条件对比,在摩擦片内径的花键约束处采用了摩擦边界,并且基于几何结构推导出了最大允许摆动角。通过数值仿真,在时域和频域分析了各影响因素对摆动的影响。结果表明:旋转的摩擦片受扰动后,角向摆动频率随转速的增加而增加,而翘曲变形会降低摆动频率。此外,最大摆动角度在低转速时会延长摩擦片摆动的时间,摩擦力则会降低摆动的时间。To reveal the variance of the dynamic characteristics of a friction disc before and after deformation during the disengagement process,the angular tilting of a spinning disc with different deformation degrees is analyzed un-der a spline-guided boundary condition.Initially,a mechanical analysis of a flat friction disc is conducted,and the dynamic model of the angular swing of the flat friction disc is established.Considerably,the deformation function of a thin plate is introduced into the flat disc function,deriving the tilting model of deformed friction discs by consid-ering the geometric difference.Meanwhile,compared with the traditional boundary condition,a friction boundary is chosen at the inner edge of the spline constraints,and the maximum tilting angle is determined considering the geo-metrical structure.Next,the effects of all influencing factors on the tilting are analyzed in the time and frequency domains.The results show that when the rotating disc is disturbed,the angular tiling frequency increases along with the rotation speed but decreases as the deflection angle increases.Moreover,the maximum tilting angle will prolong the tilting time at low rotation speed,while the friction force will reduce the tilting time.

关 键 词：离合器 摩擦片 花键约束 转盘动力学 变形圆板 刚体摆动 数值分析 频域分析 

分 类 号：U463[机械工程—车辆工程]