基于分形理论的粗糙密封表面接触模型  

Contact Model of Sealing Surfaces Based on Fractal Theory

作　　者：冯秀[1] 陆锋[2] 

机构地区：[1]南京化工职业技术学院机械技术系,江苏南京210048 [2]南京工程学院自动化学院,江苏南京211167

出　　处：《苏州大学学报（工科版）》2008年第3期29-33,共5页Journal of Soochow University Engineering Science Edition (Bimonthly)

基　　金：江苏省"六大人才高峰"资助项目(编号07-D-027);江苏高校高新技术产业发展项目(编号JHB05-29)

摘　　要：在修正的M-B接触模型基础上,考虑法兰与金属垫片接触属于静接触,接触界面摩擦作用对其不产生影响,建立法兰与金属垫片密封表面接触模型,得到了无量纲真实接触面积与压紧应力的关系。研究表明,真实接触面积随着垫片上压紧应力的增加而呈线性增加;在相同接触应力下,真实接触面积随着分形维数D的增大而增大,随着尺度系数C的增大而减小,即表面越光滑真实接触面积越大。这为金属垫片密封性能的研究提供了依据。The contact model of sealing surfaces of the flange and the metallic gasket was established on the basis of the modified M - B model, and the relationship between the contact area and the compressive stress is obtained. It＇ s found that the bigger the compressive stress, the bigger the contact area. When the compressive stresses are identical, the bigger fractal dimension and the less scale coefficient, the bigger the contact area. These can be used in the evaluation of sealing behavior of metallic gaskets.

关 键 词：密封表面 接触模型 分形理论 

分 类 号：TB42[一般工业技术]