Parametric Finite Element Analysis Of Steam Turbine Blade Based On ANSYS

Blades are the key parts of steam turbine, because of the types,quantity is numerous, accounting for a large proportion of the workloadfor the design of steam turbine. The structures are the same for steamturbine blade, basically. But due to the use of occasions, conditiondifferences, structures’ sizes are formed a series. During the steamturbine blade design task, if the modeling and finite element analysis oneby one, repeated work will be very large, extended the period of thedesign, also. In addition, in the actual blade design processing, shall berepeated the process of "design-modeling-analysis-modify thedesign-remodeling-reanalysis ". For repeated reanalysis, there are also alot of repetitive work during the finite element modeling and deal withthe results, affect the efficiency of the design and analysis. Therefore, itis necessary, with the idea of parameterized finite element analysis forthe blade root. This paper carried out the following around the bladeparametric finite element analysis:(1) Parameterized finite element analysis for single T-type, double-T,fir-tree blade root and wheel slot, preprocessing the raw data, to convertthe data into a macro file that can be used directly. To use APDLprogramming, which comes with ANSYS, blade root of parametricmodeling, material selection, meshing, loading is applied to the solutionprocess. After analysis, the results of the analysis, automatically generatea report, for reading, using. (2) When the blade root machining error exists, it will inevitablycause stress on the blade root and wheel groove changed. In this paper,the presence of the blade root processing errors, to explore the SingleT-shaped, double-T-shaped blade root analysis results, ruled between themachining errors and stress changes. The data show that the contactsurface reaction forces of the blade root and the machining error can beconsidered a linear relationship, and gives the fitting formula.(3) Parametric finite element analysis of the shroud. Against a typicalparallelogram shroud, determine the size parameters which described itsshape, using macro file which has been made. Achieve the shroud’sprocess of parametric modeling, material selection, meshing, loading isapplied, the solution. Shroud geometry was introduced, comparedparallelogram shroud, and unprocessed shrouds, centrifugal tensile stressdecreased by47.12%.