制振曲面パネルをL結合した構造における減衰の連成を考慮したFEM援用SEA応答解析

抄録

This report is about response analysis using Statistical Energy Analysis (SEA) with FEM for two panels connected in L-type shape. We adopt two panels with viscoelastic damping layers and the panel connected in L-type shape as substructures. One of the panels has a curved surface and the other panel is flat. There are viscoelastic layers on the panels. Usually, modal damping is influenced by shape of panels and forms of the connection. Therefore, to consider coupling in damping between substructures, we use FEM and MSE (Modal Strain Energy) method to identify Internal Loss Factors (ILF). We get the Coupling Loss Factors (CLF) using the Element Energy and ILF. For us to verify whether a numerical value of the proposed method is right, we compare the results from this method and those from direct FEM. As a result, we show that this method is able to get SEA parameters (ILF and CLF) of the high precision for the damped panel having curved surface. This method shows that the precision of the response calculation in the low frequency range as well as in the high frequency range could be improved.