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Abstract:
In order to obtain the turbine blade's vibration characteristics under different damping conditions, and to improve the turbine blade design level, a finite element model of turbine blade is developed in this paper. Based on the Mindlin contact model, point-to-point contact condition is simulated, while based on the one-bar microslip model, face-to-face contact condition is simulated. The two models adopted in this paper have been proved to be very accurate in describing corresponding contact phenomenon. The turbine blade response under different contact model, different normal pressure and different damping locations are calculated. It can be obtained that, there is an optimal normal pressure that generates minimum response of turbine blade. In addition, the optimal normal pressure is different when the damper is located in different locations, and there would be a best location that makes turbine blade the minimum response. The turbine blade may have different responses when different models are adopted, this is because there would be differences of stiffness and damping when different models are adopted. The computational method adopted in this paper can be generalized to the analysis of damping turbine blade, and could provide a foundation for the development of damping turbine blade. © 2015 The Japan Society of Mechanical Engineers.
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Year: 2015
Language: English
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30 Days PV: 7
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