Abstract
The application of hard coating damping technology to the blades ofblisk can effectively reduce the vibration stress and improve its service life. In this paper, a three-dimensional eight-node laminated incompatible element is proposed, which only needs the node coordinates of the structure without the coating. In the coating damping design process, it could avoid reconstructing the finite element mesh when changes the coating thickness. Based on the cyclic symmetry algorithm and the SNM method, a finite element reduction model to analyze the vibration characteristics of the coated blisk with coating thickness mistuning was established andverified by ANSYS. The results indicate that the proposed finite element model can be used to analyze the vibration characteristics with the changed coating thicknessand it shows great consistence with the result of ANSYS. On the other side, the SNM still has high accuracy when the coating thickness varies from 0 mm to 0.3 mm.
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