Equations of motion are derived for blade of variable mass and stiffness distribution and solution presented; natural frequencies of blades can be changed appreciably by varying locations of blade hinges, and ratios of natural frequency to rotor speed below value of 6.0 are essentially constant for variations in rotor speed consistent with helicopter and VTOL applications.


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    Title :

    Analysis of flapwise bending frequencies and mode shapes of rotor blades having two flapping hinges to reduce vibration levels


    Additional title:

    NASA -- Tech Note


    Contributors:


    Publication date :

    1960


    Size :

    28 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :