The Energy Finite Element Analysis (EFEA) has been utilized successfully for modeling complex structural-acoustic systems with isotropic structural material properties. In this paper, a formulation for modeling structures made out of composite materials is presented. An approach based on spectral finite element analysis is utilized first for developing the equivalent material properties for the composite material. These equivalent properties are employed in the EFEA governing differential equations for representing the composite materials and deriving the element level matrices. The power transmission characteristics at connections between members made out of non-isotropic composite material are considered for deriving suitable power transmission coefficients at junctions of interconnected members. These coefficients are utilized for computing the joint matrix that is needed to assemble the global system of EFEA equations. The global system of EFEA equations is solved numerically and the vibration levels within the entire system can be computed. The new EFEA formulation for modeling composite laminate structures is validated through comparison to test data collected from a representative composite aircraft fuselage that is made out of a composite outer shell and composite frames and stiffeners. NASA Langley constructed the composite cylinder and conducted the test measurements utilized in this work.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Energy Finite Element Analysis Developments for Vibration Analysis of Composite Aircraft Structures


    Additional title:

    Sae Int. J. Aerosp


    Contributors:

    Conference:

    SAE 2011 Noise and Vibration Conference and Exhibition ; 2011


    Published in:

    Publication date :

    2011-05-17


    Size :

    9 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Energy Finite Element Analysis developments for vibration analysis of composite aircraft structures

    Vlahopoulos,N. / Schiller,N. / Lee,S. et al. | Automotive engineering | 2011



    Finite Element Vibration Analysis of Damped Structures

    M. L. Soni / F. K. Bogner | AIAA | 1982


    Vibration Analysis of Aircraft Structures

    Hedgepeth, J. M. | NTRS | 1961


    Finite element analysis of cracks in aging aircraft structures with bonded composite-patch repairs

    Gu, Linxia / Kasavajhala, Ananth Ram Mahanth / Zhao, Shijia | Tema Archive | 2011