轴、孔接触面荷载分布研究

Study of loads distribution between shaft and hole body contact interface

提出基于有限元法分析接触问题的方法,求解轴、孔半径相近且考虑接触宽度时接触面荷载分布,解决了赫兹弹性接触理论以及工程上常用的关于轴、孔接触面荷载分布方法的局限性.首先利用ANSYS建立轴、孔配合简化模型,采用有限元接触分析方法求解出接触面上荷载的分布形式;然后利用MATLAB拟合工具箱,使用三角函数、高斯函数拟合出荷载的空间分布方程;最后应用于确定大功率风力发电机增速器中大行星架、大行星轮轴接触面之间的荷载分布,验证了方法的优越性.

A method on loads distribution between shaft and hole body is proposed based on FE contact analysis,and the problem is solved in Hertz contact theory and common method on loads distribution between shaft and hole body in engineering when their radii are close and contact interface′s width is taken into account.First of all,the most common FE model of shaft and hole body in engineering in ANSYS is established,and FE contact method is made full use of to simulate the loads distribution in contact interface.Then,the loads distribution function is given in space through triangle function and Gauss function in MATLAB curve fit tool box.In the end,the method is used in loads distribution on the shaft and hole body between the major planet frame and major planet gear shaft in large power wind energy generator accelerator system,and the results testify the superiority of the method.