| Blade is one of the most important parts in Axial-Flow Compressor, the static and dynamic characteristics of blade will influence the security of the system running directly when the compressor running. The first-stage blade of the axial-flow compressor designed by an enterprise is used as the research object. It's static and dynamic characteristics is studied by using the finite element method. The blade geometric structure is improved based on the results of the study.Geometric modeling, geometric model import, gridding division during the process of finite element modeling are studied. An effective blade finite element modeling method is given. Data loss problem is resolved by this method in the process of CAD model is transferred to the finite element analysis software. The meshing method guarantees high quality grid model.The constraint way of blade is studied and a valid constraint way is established. The static characteristics of the blade subjected to different loads are analyzed, obtains the stress and displacement variation rule. The results show that high stress in serration and its arc transition region, and observed that severe stress concentration in these locations.Static and dynamic frequency and dynamic stress are analyzed by using the modal analysis method and the transient dynamics method. Dynamic stress not only fluctuations but also its peaks is larger, four serration dynamic stresses is not equality.Blade fracture location is match to the position of maximum stress derived from the static analysis, so try to reduce stress concentration increases the intensity of the blade is critical. In the thesis, two structure modification solutions are proposed. A comparison is made in the focus location of stress concentration after a finite element static analysis for new model. The results show that both solutions can reduce stress concentration and the second solution can reduce stress concentration significantly.
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