附件机匣壳体变形分析及轴承孔平行度计算方法

Analysis on Accessory Gearbox Housing Distortion and Calculating Method on the Parallel Degree of Bearing Hole

作为承力部件的附件机匣壳体,其变形会对附件机匣的安全性及可靠性产生影响。根据附件机匣的工作载荷,通过有限元分析的方法分析附件机匣工作下壳体受力变形情况,预先估计壳体变形对壳体支撑及定位精度的影响。并以有限元分析得出的轴承孔变形量为基础,根据空间向量理论,提出一种定量计算轴承孔平行度的方法,为附件机匣壳体的结构优化设计提供理论指导。

The accessory gearbox housing is the part of bearing the load. Its distortion will affect the security and reliability of accessory gearbox. According to the working load of accessory gearbox, the housing distortion was analyzed at accessory gearbox housing working by finite element analysis. The influence of the housing distortion to support and assembly was beforehand estimated. The calculating method of the parallel degree of bearing hole is proposed according to the theory of space vector and basing on the distortion of bearing hole by element analysis. It provides the theory for accessory gearbox housing structure modification.