Abstract:

In this study, a modal empedance-based statistical energy analysis (IEA) procedure for the analysis of the medium and high frequency vibration of linear connected composite structures with massally randomly achieved structural uncertainty was presented. The proposed approach calculates the final system empedans by obtaining the modal information of each subsystem and uses these empedans to predict the IEA parameters. Modal information is calculated by the final elements method (SEM) by providing the approximate physical limit condition similarity of each subsystem to the entire system. The method, unlike the classic IEA method, more realisticly demonstrates the total energy of the final system, taking into account not only the endless empedans of the force point, but also the endless transfer point empedans. This method is used to obtain linear connection empedans, using the principle of a dimension reduction performed through point empedans. Here the method was tested with a linear-connected enhanced composite structure consisting of two isotropic bars and a eight layer symmetrical composite plate with a mass random variation. The accuracy and success of the proposed approach has been demonstrated by the final elements (SE) based Monte Carlo simulations and the classic IEA results.

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