Characteristics of Natural Frequencies of Steam Turbine Blades : 3rd Report, Vibration of Bound Blades on Entire Disk Circumference

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概要

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• To avoid resonance of steam turbine blades during operation, it is necessary to establish a prediction method for the natural frequencies of blades. Therefore, a calculation method of the natural frequencies is developed for structures with blades bound on the entire disk circumference. Five natural frequencies exist within the range below 500 Hz in calculations of the natural frequencies of a single blade with turbine. Vibration characteristics for these natural frequencies are shown systematically by taking the direction of the vibration into account when moment of inertia is small at the middle of the blade between blade root and blade tip. The relation between the natural frequencies of all bound blades and those of a bound group consisting of several blades, and variations of the natural frequencies according to variation in blade dimensions are also discussed.

• 一般社団法人日本機械学会の論文

著者

• Shiga Motohiro

  Mechanical Engineering Research Laboratory Hitachi Ltd.

関連論文

• Prevention of Torsional Vibration in Fan Motor Shaft Systems with Multiblade Fans : 3rd Report: Method of Frequency Control using Correction Weights
• Natural Frequencies of Stator Core of Induction Motor : 1st Report, Characteristics of Radial Vibration
• Characteristics of Natural Frequencies of Steam Turbine Blades : 1st Report, Relationship on Vibration between Grouped Blades and Disk
• Vibration Characteristics of Grouped Steam Turbine Blades
• Characteristics of Natural Frequencies of Steam Turbine Blades : 3rd Report, Vibration of Bound Blades on Entire Disk Circumference
• Characteristics of Natural Frequencies of Steam Turbine Blades : 2nd Report, Influence of Disk on Vibration of Grouped Blades
• Natural Frequencies of Stator Core of Induction Motor : 2nd Report, Analysis of Radial Natural Frequencies

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