机匣横向安装边螺栓联接结构应力分析

摘要

The bolt-lfange connection structure is mostly used in aeroengine casing connection model. In order to accurately simulate the influence of bolt-flange connection structure of the aeroengine casing, finite ele-ment software ANSYS Workbench is applied,and pre-tightened force model in the finite element software is applied to simulate bolt with pre-tightened forces. By se-lecting a set of different size of pre-tightened forces to be calculated, the relative curve between pre-tightened forces and the equivalent stress and stress intensity in the bolt-lfange connection structure are obtained. The inlfuences of installation edge thickness, installation height of edge and bolt radial positions to the stresses of bolt-lfange connec-tion structure are obtained using ifnite element calculation. Conclusions of this paper provide a reference basis for cas-ing bolt connection structure design.%航空发动机机匣多采用安装边螺栓联接结构。为了准确模拟安装边螺栓联接结构对航空发动机机匣的影响，本文利用ANSYS Workbench有限元软件对安装边螺栓联接结构进行仿真计算，应用有限元软件中的预紧力施加模块模拟螺栓的预紧力。通过选择一组不同预紧力大小进行计算，得到预紧力与安装边螺栓联接结构处等效应力及应力强度的关系曲线；通过有限元计算，获得安装边厚度、安装边高度及螺栓位置对安装边螺栓联接结构应力的影响规律，为机匣螺栓联接结构设计提供了参考依据。