Experimental and Finite Element Analysis of Natural Modes and Frequencies of Hollow Fan Blades

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Experimental and Finite Element Analysis of Natural Modes and Frequencies of Hollow Fan Blades

Bolotov, B.; Nikhamkin, M.Sh

Applied Mechanics and Materials, 12/2013, Volume: 467, Issue: Materials Science and Mechanical Engineering

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Natural modes and frequencies of gas turbine engine hollow fan blades were experimentally investigated. The blades were produced with the method of super-plastic molding and pressure welding combination. Two independent experimental methods were used: three-component scanning laser vibrometry and impact modal analysis. Natural frequencies and vibration modes of a hollow fan blade and stress fields corresponding to the natural modes were got. The finite element modal analysis was carried out. The hollow fan blade was stated to have particular natural vibration modes. The investigation results can be used to detune the resonance vibrations and to verify calculation models.

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