中文摘要：

以沈阳透平机械股份有限公司生产的离心压缩机为例，分析和研究离心压缩机焊接机壳的强度。通过运用ANSYS强度分析软件对焊接机壳进行分析，从而得到压缩机机壳的外壳板、端板和中分面法兰的受力情况和在外载荷作用下机壳厚度变化过程，在此基础上确定机壳结构合理性，并提出相应的结构优化设计方案。

英文摘要：

Take centrifugal compressors of Shenyang turbo- Machinery Co., Ltd., as an example, the paper analyzes and research strength of welding volute. Make use of ANSYS software analyze shell of centrifugal compressor, then we will find shell, horizontal flange and end plate of the force and load, at that time we can find it deformation. In the basic of result, we can find it optimization design case.