Natural Frequencies of Axial Vibration of Turbine Buckets for High Pressure Stage

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概要

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• The calculating method of the natural frequencies for the axial vibration, without coupling in the tangential and axial vibration, of the grouped turbine buckets in which the effects of the shear deformation and the rotary inertia were considered, was obtained, so that it is now possible to calculate the natural frequencies more precisely than in the past. By this method the natural frequencies of the grouped backets were calculated, and it was found that the calculated values fairly agree with the measured ones. The natural frequencies without the effect of the shear deformation of the shroud were mostly higher than those calculated the other way. In the case of the mode of vibration in which the vibratory amplitude of each bucket of the grouped ones is equal, the effect of the shear deformation of the shroud on the natural frequency is small.

• 一般社団法人日本機械学会の論文

著者

• Shiga Motohiro

  Hitachi Research Laboratory Hitachi Ltd.

関連論文

• Natural Frequencies of Axial Vibration of Turbine Buckets for High Pressure Stage

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