Built-up structures, especially those involving shell-type components, are encountered in many areas of engineering. Since full three-dimensional modeling may be cost prohibitive, shell-type elements have played an important role in dynamic simulations; however, the nonlinear dynamic analysis is still relatively expensive because of the enormous computations involved. Most often, implicit approaches such as the Newmark beta = 0.25 are commonly employed. With the motivation of further enhancing the accuracy and efficiency of analysis of large practical structural problems, explicit, unconditionally stable approaches newly developed by the authors to analyze the dynamics of linear/nonlinear shell structures are described and subsequently, the applicability to large-scale practical structural dynamics problems is shown. The explicit nature of the formulations and the unconditionally stable algorithmic stability and excellent algorithmic attributes in conjunction with efficient numerical computational features indeed lend themselves well for the analysis of a wide class of complex shell-type structural configurations. The computational and implementation aspects and the numerical evaluation of the so-called VIP (virtual-pulse) time integral methodology that inherits these attributes for general shell-type structural dynamics problems are presented here. Comparisons are also drawn between the VIP methodology and the Newmark family of methods on the aspects of the accuracy and computing time. The numerical results given, which were performed on the Cray supercomputer, show the applicability of the VIP methodology for practical problems, and the computations demonstrate the significant reduction in computing time compared with the most widely advocated Newmark family of methods for given accuracy conditions.


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    Title :

    Explicit unconditionally stable approaches for built-up shell structural configurations


    Additional title:

    Explizites, unbedingt stabiles Verfahren für zusammengesetzte Schalenstrukturen


    Contributors:
    Chen, X. (author) / Tamma, K.K. (author) / Sha, D. (author)

    Published in:

    AIAA Journal ; 34 , 8 ; 1725-1733


    Publication date :

    1996


    Size :

    9 Seiten, 16 Bilder, 3 Tabellen, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English