The effect of local blade crack on the mode localization in a rotating turbo disk with a group-blade assembly was studied. Periodically coupled Euler-Bernoulli beams were used to approximate the grouped and shrouded turbo blades. The cracked blade, regardedas a local disorder, was modeled using a two-span beam. A spring was imposed on this two-span beam to characterize the local crack. The Galerkin method was applied to formulate the localization equations of the mistuned system. Numerical results indicate that the blade crack, crack distribution and rotation speed in a rotating group-blades disk may affect the localization phenomenon significantly.
- International Gas Turbine Institute
Mode Localization in a Grouped Bladed Disk
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Kuang, JH, & Huang, BW. "Mode Localization in a Grouped Bladed Disk." Proceedings of the ASME Turbo Expo 2000: Power for Land, Sea, and Air. Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education. Munich, Germany. May 8–11, 2000. V004T03A014. ASME. https://doi.org/10.1115/2000-GT-0369
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