OWING to vibration troubles which occasionally arise in engine crankshaft propeller systems, it has become necessary to investigate such possibilities in the design stage. In this paper we are concerned with the torsional vibration of an engine crankshaft coupled with flexural vibration of the propeller. The engine crankshaft will have a number of throws, which it has become customary to replace by “equivalent” pulleys which have the same moments of inertia as the complete crankthrows and are usually designated as engine “masses”. Assuming that there is a node in the propeller shaft, we may represent the torsional stiffness of the propeller shaft between the gears and the node by ca / (l−γ) where ca is the torsional stiffness of the propeller shaft; the torsional stiffness of the other portion of the propeller shaft will then be ca/γ. The frequencies of torsional vibrations of the engine crankshaft system about the assumed node are found for various values of γ. The corresponding frequencies of flexural vibrations of the propeller arc also found for the same values of γ. The two sets of frequencies may then be plotted against γ, giving engine crankshaft and propeller frequency curves respectively.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Engine Crankshaft Frequency Curves


    Contributors:
    Morris, J. (author) / Evans, W.J. (author)

    Published in:

    Publication date :

    1943-06-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Aircraft Engine Crankshaft Optimisation

    Vopařil Jan / Drápal Lubomír / Novotný Pavel | DOAJ | 2014

    Free access

    Engine crankshaft jacking tool

    MEI CHUNYANG | European Patent Office | 2021

    Free access

    Airplane engine crankshaft design

    Angle, Glenn D. | Engineering Index Backfile | 1919


    R.W. Oil engine crankshaft

    Engineering Index Backfile | 1941


    Engine crankshaft assembling lifting appliance

    LUO PING / WU HONGLANG / ZHU HONGLEI et al. | European Patent Office | 2021

    Free access