斜齿轮有限元接触分析参数化建模方法

Parameterized Modeling Method of Helical Gears Based on Finite Element Contact Analysis

提出了基于SQL Server数据库的斜齿轮有限元信息结构模型,开发了参数化轮齿接触分析有限元建模程序。首先利用APDL生成原始直齿轮模型,将单元、节点信息导入SQL Server数据库,然后在SQL Server数据库中批量化变换、修改节点坐标,并导入ANSYS依据原单元与节点关系重建有限元网格,实现斜齿轮有限元分析精确、高效建模。提出了一种基于分级剖分的网格细化方法,解决轮齿接触区网格细化难题,与以往的全齿面细化相比,可以有效地缩减节点规模,提高计算效率和精度。考察了斜齿轮修形前后轮齿接触区和应力分布的变化情况。

The information structure model of helical gear finite element analysis based on SQL Server data base was put forward. The parameterized modeling program for tooth contact finite element analysis was developed. The original spur gear finite element model was established by APDL,then,nodes and elements were input into SQL Server data base.The rotation transformation of node coordinates was made and the elements were built according to the correlation of original node and element in order to create quickly helical gear finite element model. A hierarchical subdivision algorithm was developed for mesh refinement of tooth contact zone instead of entire tooth surface. So,the number of nodes was reduced significantly.Accordingly,computation efficiency and computation precision was increased. Furthermore,an example was presented to demonstrate the influences of the gear＇s modification parameters on the tooth contact zone and von Mises stress.