Energy Density Prediction of Random Structures Using Perturbation Method

Kun Wang; Yang Zhao

doi:10.4028/www.scientific.net/AMM.271-272.877

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 271-272Energy Density Prediction of Random Structures...

Energy Density Prediction of Random Structures Using Perturbation Method

Abstract:

To predict energy density response of random structures using EFEM, a perturbation method was introduced into governing equations of energy density for one- and two-dimensional structures. Two equation sets governing the energy density response of random structures were obtained. Simulations were carried for a plate with random damping ratio and the energy density response was obtained. It can be seen that EFEM provides space- and frequency-averaged response. Comparing with probabilistic method, the governing equation sets provide the same mean response and a smaller response range. The perturbation method using in EFEM turns out an effective method with less uncertainty and a promising method for response prediction for random structures.