Abstract The mathematical model of the fuel oscillations in the rockets feed lines with gas–liquid dampers is derived. The nonlinear model of the gas–liquid damper is suggested. The vibrations of fuel in the feed lines with the gas–liquid dampers are considered nonlinear. The weighted residual method is applied to obtain the finite degrees of freedom nonlinear model of the fuel oscillations. Shaw–Pierre nonlinear normal modes are applied to analyze free vibrations. The forced oscillations of the fuel at the principle resonances are analyzed. The stability of the forced oscillations is investigated. The results of the forced vibrations analysis are shown on the frequency responses.

    Highlights Mathematical model of the fuel oscillations in the feed line with gas–liquid dampers. The weighted residual method is applied to obtain the model of the fuel oscillations. Shaw–Pierre nonlinear normal modes are applied to analyze free vibrations. The forced oscillations of the fuel at the principle resonances are analyzed.


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    Title :

    Nonlinear longitudinal oscillations of fuel in rockets feed lines with gas–liquid damper


    Contributors:

    Published in:

    Acta Astronautica ; 120 ; 20-29


    Publication date :

    2015-11-24


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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