非高斯机械结合面法向接触理论建模与特性分析  

Normal Contact Theory Modeling and Characteristic of Non-Gaussian Mechanical Joint Surfaces

作　　者：童泽腾 陈开虎 赵小惠[1] 陈剑 朱林波 TONG Zeteng;CHEN Kaihu;ZHAO Xiaohui;CHEN Jian;ZHU Linbo(School of Mechanical and Electrical Engineering,Xi'an Palytechnic University,Xi'an 710048,China;Lanzhou Lanshi Heavy Equipment Co.,Ltd.,Lanzhou 730000,Chine;School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]兰州兰石重型装备股份有限公司,甘肃兰州730000 [3]西安交通大学化学工程与技术学院,陕西西安710049

出　　处：《轻工机械》2025年第2期20-27,共8页Light Industry Machinery

基　　金：国家自然科学基金项目(52005381)。

摘　　要：为准确预测非高斯机械结合面的接触特性,课题组提出了一种法向弹塑性接触建模方法。首先建立满足连续光滑性的单个微凸体接触特性表达式;然后采用Johnson分布函数表征非高斯结合面高度分布;最后利用统计学方法构建非高斯机械结合面法向接触模型,并将模型预测结果与其他模型和实验结果进行对比;此外分析了偏度、峰度以及塑性指数对接触特性的影响。结果表明:减小偏度和峰度与增加塑性指数可提高结合面的接触刚度。课题组的研究为相关工程应用中的接触设计及性能评估提供了重要参考。In order to accurately predict the contact characteristics of non-Gaussian mechanical joint surfaces,a normal elastic-plastic contact modeling method was proposed.Firstly,an expression for the contact characteristics of a single asperity satisfying continuous smoothness was established.Then,the Johnson distribution function was used to characterize the non-Gaussian joint surfaces height distribution.Finally,a non-Gaussian mechanical joint surfaces normal contact model was constructed using statistical methods,and the model predictions were validated in comparison with other models and experimental results.In addition,the influence laws of skewness,kurtosis,and plasticity index on the contact characteristics were analyzed.The results show that decreasing the skewness and kurtosis and increasing the plasticity index can improve the contact stiffness of the joint surfaces,which provides an important reference for the contact design and performance evaluation in related engineering applications.

关 键 词：接触理论 接触特性 结合面 微凸体 偏度 峰度 

分 类 号：TH113[机械工程—机械设计及理论] O343.3[理学—固体力学]