计及塑性接触层的法向接触刚度等效方法  

Equivalent method for normal contact stiffness considering plastic contact layer

作　　者：刘意[1] 刘恒[1] 易均[1] 王为民[2] 

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]东方汽轮机有限公司,四川德阳618000

出　　处：《振动与冲击》2013年第7期43-47,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51075315);国家自然科学基金资助项目(51175410);精密数控机床精度保持性技术研究(2010ZX04014-015)

摘　　要：采用典型粗糙体—刚性面接触模型,针对完全弹性与理想弹塑性两种材料,分析法向接触刚度等效方法是否准确。发现一般方法在处理弹塑性接触时存在较大差并揭示其本质原因。通过引入界面接触层,提出接触界面等效新方法并验证其准确性,实现对原系统准确动力等效。采用两种等效方法通过实例对比分析对动力系统振动特性影响,为工程实际中含接触界面系统动力学研究提供参考。With a the typical rough-body-and-rigid-plane contact model, both fully elastic and elastic-plastic material were used to analyze if the general equivalent method for normal contact stiffness is accurate. Significant error was found when dealing with elastic-plastic contact and the essential reason was revealed. By introducing an interracial contact layer, a new interracial equivalent method was presented and the accuracy of the new method was tested. The accurate dynamic equivalence of the original system was finally achieved. The effect of the two equivalent methods on vibrating characteristic of a dynamic system was contrastively analyzed through an actual example.

关 键 词：法向接触刚度 等效方法 接触层 振动特性 

分 类 号：TH113[机械工程—机械设计及理论] TP117[自动化与计算机技术—控制理论与控制工程]