A simplified analytical method is proposed to obtain eigenfrequencies and modes of a rocket with an asymmetric configuration. This method is an extension of the symmetric beam element matrix method and utilizes asymmetric beam elements. The purpose of this simplified analysis using a FORTRAN 77 program is to prepare an analytical tool for the preliminary design phase and a rough-check tool for detailed analysis. This program has three functions: (1) to generate stiffness and mass matrices for the asymmetric beam element using Timoshenko-type beam theory, (2) to calculate the dynamical matrix from which rigid body degrees of freedom are eliminated, and (3) to calculate eigenvalues and eigenvectors. A sample analysis of the structural vibrations in a hypothetical rocket with an asymmetric configuration is conducted to demonstrate the capability of this simplified method. The results obtained agree well with those obtained by MSC/NASTRAN analysis, and this proposed method greatly simplifies the preparation of a model. Based on these findings, the proposed method is judged to be an efficient tool for the analysis of structural vibrations in an asymmetric rocket.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Simplified method of analysis of structural vibrations of asymmetric rockets


    Weitere Titelangaben:

    Vereinfachte Analyse der Strukturschwingungen von asymmetrischen Raketen


    Beteiligte:
    Kohsetsu, Y. (Autor:in)


    Erscheinungsdatum :

    1998


    Format / Umfang :

    9 Seiten, 12 Bilder, 2 Tabellen, 17 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    A Simplified Approach for Prediction of Fire for Unguided Rockets

    Joshi, D. K. / Rao, A. V. / Ghosh, A. K. | British Library Conference Proceedings | 1995



    Rockets

    Semper, M.G. | Engineering Index Backfile | 1928


    STRUCTURAL PROPELLANT FOR ION ROCKETS (SPIR)

    CHILDRESS JAMIE J / KESSLER THOMAS L | Europäisches Patentamt | 2020

    Freier Zugriff

    Structural Propellant for ion rockets (SPIR)

    CHILDRESS JAMIE J / KESSLER THOMAS L | Europäisches Patentamt | 2019

    Freier Zugriff