固定结合面切向接触阻尼分形模型  

A Fractal Model of the Tangential Contact Damping on Fixed Joint Surfaces

作　　者：姜来[1] 张学良[1] 陈永会[1] 兰国生[1] 温淑花[1] 张颖[1] 杨波[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》2014年第5期380-385,共6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);山西省回国留学人员科研资助项目(2011-076);山西省研究生优秀创新项目(20123103)

摘　　要：基于三维接触分形理论和固定结合面切向接触阻尼耗能机理,建立了考虑弹塑性接触变形机制的固定结合面切向接触阻尼分形模型。模型仿真结果表明:切向接触阻尼会随着法向接触载荷的增大而增大;当表面分形维数小于等于2.5时,切向接触阻尼会随着分形维数的增大而增大;当表面分形维数大于2.5时,切向接触阻尼会随着分形维数的增大而减小。模型仿真结果也揭示了分形粗糙度尺度参数、塑性指数和摩擦因数对切向接触阻尼的影响。Based on the three-dimensional contact fractal theory and the energy dissipation mechanism of tangential contact damping on fixed joint surfaces,a fractal model of the tangential contact damping on fixed joint surfaces considering the elasto-plastic contact deformation mechanism is proposed. Numerical simulation shows that the tangential damping increases with the normal load and the fractal dimension when D≤2. 5,but when 〉2. 5 it decreases with the fractal dimension. The results also reveal the other parameters such as fractal roughness scaling parameter,plasticity index and friction factor are also very important to the tangential contact damping.

关 键 词：分形理论 弹塑性区域 耗能机理 切向接触阻尼 

分 类 号：TH113.1[机械工程—机械设计及理论]