30th Congress of the International Council of the Aeronautical Sciences

03.2 - Structural Analysis and Design, Structural Dynamics, Aeroelasticity

RESEARCH ON VIBRATION CHARACTERISTIC FOR VARIABLE ROTATING VELOCITY BLADES

J. Qin¹, B.-W. Wang¹; ¹ASRI, China

Aimed at the configuration and operation characteristics of the blades of the aero engine, based on sheet bending theory, considering the centrifugal load, the frequency and mode shape of the blades are studied by the beam function combination method, which is used to flutter analysis of the blades. Considering the different engine speed, the rule for the effect of flutter critical parameters are researched. The theoretical foundation of the frequency and mode shape research on cantilever sheet are obtained. The new methods of investigation on frequencies and mode shape have been studied. The given frequency and mode shape solutions are rather practical for the blade fatigue detecting, what’s more, the theoretical base of flutter designing for engine blade are supplied.rn


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