Component Mode Synthesis (CMS) is often used for generation of system models. Models that utilize the Craig-Bampton approach require constraint modes which are readily obtained for analytical applications. However, these constraint modes are not so easy to obtain from an experimental standpoint. This is a significant obstacle in the generation of experimentally based component mode synthesis models. An alternate approach has been developed using reduced order, test verified components for the development of the Craig-Bampton CMS model. This approach utilizes frequency and shape information acquired from modal testing to update reduced order finite element models using direct analytical model improvement techniques. The connection degrees of freedom are then rigidly constrained in the test verified, reduced order model to provide the boundary conditions necessary for constraint modes and fixed interface normal modes. The analytical methodology has been demonstrated for several cases. The approach shows very promising results even when the original components are not very well correlated to their test counterparts. This paper extends this methodology to include test data for the component models. A typical test case is shown to illustrate the results. The results show that this technique can be very accurate in the development of reduced order, test verified Craig-Bampton CMS models.


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    Title :

    Component mode synthesis using reduced order, test verified components


    Contributors:


    Publication date :

    2009


    Size :

    14 Seiten, 13 Bilder, 15 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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