摘要：Thediaphragmofsteam turbine isoneofthemainpartsofthepassageunitfor air *** studying its working conditionand performance, the three-dimensionalfinite element model（FEM）with thesoftware ANSYS10.0 isestablished according to theactualworking parameters. With the model, the deformation resultsand stress field resultsare analyzed andthe maximum displacement and stress value are calculated, meanwhile,theircorrespondingpositions are found. It provides a good foundationfor solving the problem inproduction.

摘要：The diaphragm of steam turbine is one of the main parts of the passage unit for air flowing and the diaphragm of steam turbine is generally made by welding, but during the course of welding, some cracks often have happened, these cracks threaten safety production on the spot, so it is necessary to analyze the strength of steam turbine diaphragm with a crack. For studying its working condition and performance with a crack, the three-dimensional finite element model （FEM） with the software ANSYS 10.0 is established according to the actual working parameters. With the model, the deformation results and stress field results are analyzed and the maximum displacement and stress value are calculated, meanwhile, the maximum stress change with crack depth of steam turbine diaphragm is analyzed. It provides a good foundation for solving the problem in production.

摘要：采用Pro/e软件进行隔膜泵动力端-曲柄滑块机构的三维建模,利用机械系统动力学仿真软件ADAMS构建虚拟样机,通过样机仿真确定隔膜泵曲柄滑块机构的运动学和动力学参数,为隔膜泵动力端的设计打下基础。