For the structural dynamic analysis of complicated beam-type structures, a detailed finite element model with large number of degrees of freedom is almost impossible to be used due to the huge computational cost and storage requirements. Therefore, a novel reduced-order model is proposed to determine the natural frequencies of the beam-type structures in this study, which is established by using a reduction basis along with the polynomial interpolation function. The basic idea is to convert the displacements of finite element model nodes in each cross section to a small set of nodes with a few generalized degrees of freedom. The proposed reduced-order model can gain a significant reduction of computational cost without sacrifice of accuracy; moreover, it has the ability to identify shell lobe-type modes and coupled modes. Several numerical case studies for different beam-type structures, including thin-walled cylinder, stiffened shells, and thin-walled cylinder with cutouts, are studied, and the outcomes are validated by benchmark studies.


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    Title :

    Free Vibration Analysis of Beam-Type Structures Based on Novel Reduced-Order Model


    Contributors:
    Wang, Bo (author) / Li, Yuwei (author) / Hao, Peng (author) / Zhou, Yan (author) / Zhao, Yang (author) / Wang, Bin (author)

    Published in:

    AIAA Journal ; 55 , 9 ; 3143-3152


    Publication date :

    2017-05-10


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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