机床固定结合面接触热导三维分形模型  

Three-dimensional Fractal Model Combined with Surface Thermal Contact Conductance of Machine Tool

作　　者：吴阳[1] 张学良[1] 温淑花[1] 陈永会[1] 兰国生[1] 刘丽琴[1] 

机构地区：[1]太原科技大学机械工程学院,太原030024

出　　处：《太原科技大学学报》2015年第5期368-374,共7页Journal of Taiyuan University of Science and Technology

基　　金：国家自然科学基金资助项目(51275328);山西省自然科学基金项目(2012011023-4)

摘　　要：结合面的热变形是影响机床精度的一个主要原因,而对接触热导的研究可以从理论上探究影响热变形的深层原因,基于对固定结合面单点接触模型的研究,并在考虑了弹塑性变形机制的情况下,建立了固定结合面接触热导分形模型并通过仿真计算得出了分形维数、分形粗糙度尺度参数等材料性能参数对固定结合面接触热导的影响关系。The thermal deformation of the combined surface is one of the main reasons that affect the accuracy of machine tools,and the research on thermal contact conductance can theoretically explore the underlying causes of the influence of thermal deformation,this paper studies on combined surface based on single-point contact model,and takes into account the elastic-plastic deformation mechanism. The combined surface contact thermal fractal model was established,and the influence of fractal dimension,fractal rough performance scaling parameters such as material parameters on the combined surface thermal contact conductance was got through model simulation.

关 键 词：三维分形接触理论 弹塑性 接触热阻 

分 类 号：TH113[机械工程—机械设计及理论]