Resonance Characteristics of Turbine Blades with Compound Periodic Structure

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This paper describes the resonant response of the compound periodic structure, which includes both grouped and one-ringed blade structures in a turbine wheel to form a circumferential periodicity with a packet as a unit. The resonant condition is derived by calculating the energy suppled from engine order excitation to a natural mode composed of plural nodal diameter modes. Then, the resonant stresses are calculated by equating the supplied energy and the energy dissipated by damping. As an example the resonant response and stresses are determined for a simple blade model assuming a fixed mode firstly, and then a traveling mode around the circumference.
一般社団法人日本機械学会の論文
1998-08-15