固定机械结合面法向接触刚度分形模型  

Research on Normal Contact Stiffness Modeling of Mechanical Interface

作　　者：谭文兵 兰国生[1] 张学良[1] 孙万 温淑花[1] 陈永会[1] TAN Wen-bing;LAN Guo-sheng;ZHANG Xue-liang;SUN Wan;WEN Shu-hua;CHEN Yong-hui(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,太原030024

出　　处：《组合机床与自动化加工技术》2021年第4期36-39,44,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51275328);山西省自然科学基金(201601D011062);山西省“1331”工程重点学科建设资助项目。

摘　　要：针对以往结合面法向接触刚度分形模型在理论计算上存在的问题,对结合面单个微凸体弹性接触阶段法向刚度,单个微凸体弹塑性接触变形阶段的法向载荷以及法向刚度进行改进,进而建立了综合考虑微凸体弹性、塑性以及弹塑性两个阶段此三种变形机制的结合面法向接触刚度分形模型。模型理论预测值与实验值的对比结果可见,所建模型能较好地预测结合面法向接触刚度,表明了其正确性与可靠性,验证了理论改进算法的有效性。所建模型可用于相关的分析与计算,为进一步对结合面动态刚度特性的研究提供了理论依据。Aiming at the shortcomings of the theoretical analysis of the normal contact stiffness model of the joint surface,Applying the idea of extremes and basic fractal theory,An algorithm for correcting the normal stiffness of the elastic contact phase of a single asperity at the interface and an improved algorithm of the normal load and the normal stiffness of the elastoplastic contact deformation phase was proposed.And then,a normal contact stiffness model of joint interfaces was presented with consideration of elastic,elastic-plastic and plastic deformation.The comparison between the theoretical predictions of the model and the experimental values shows its correctness and reliability,which can be used for related theoretical analysis and calculation.

关 键 词：结合面 法向接触刚度 弹塑性 分形模型 

分 类 号：TH113.1[机械工程—机械设计及理论] TG65[金属学及工艺—金属切削加工及机床]