轴孔协调接触建模与试验研究  

Modeling and experimental research on a coordinated contact between a shaft and hole

作　　者：李云涛[1] 全齐全[1] 唐德威[1] 侯绪研[1] 

机构地区：[1]哈尔滨工业大学机器人技术与系统国家重点实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2016年第11期1546-1552,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(61403106)

摘　　要：传统的轴孔接触解析模型通常研究轴与带孔无限大平面的接触问题,未考虑孔壁厚度对轴孔接触特性的影响。本文考虑孔壁厚度对轴孔接触特性的影响,基于Winkler弹性基础模型和几何约束条件,沿接触点的法线方向建立了轴孔协调接触解析模型。分析轴孔协调接触模型发现,接触力和接触刚度受间隙和孔壁厚度影响较大。基于图像法开展的轴孔接触试验结果表明,轴孔的接触刚度随接触深度的增大呈现非线性增大的特征,而且与以往的轴孔静态接触模型相比,本文所建立的模型与试验数据的吻合程度较高,因而本文提出的接触模型能够准确描述轴孔的协调接触特性。In this study, the traditional contact models mainly focus on the contact between a shaft and an infinite plane with a hole, usually ignoring the effect of the hole＇s wall thickness on the contact characteristics. A coordinated contact model is established on the basis of the geometric constraint condition and the Winkler elastic foundation model, given that the contact characteristics of the shaft and the hole are influenced by the hole＇s wall thickness. The model is built along a normal direction of contact points. A model analysis shows that the contact force and stiffness are greatly affected by clearance and wall thickness of the hole. The contact experiments based on the image method show that the contact stiffness of the shaft-hole nonlinearly increases following the contact depth increase. In addition, the contact model has good consistency with the test data compared with the other models. The model can more accurately describe the contact characteristics of the shaft and the hole than the previous models, thereby providing a theoretical basis for the analysis of the dynamic characteristics of mechanism with clearance.

关 键 词：协调接触模型 回转铰链 几何约束 弹性层 图像法 

分 类 号：TH131[机械工程—机械制造及自动化]