103 自動車 NV 用バーチャルプロトに向けた SEA モデルの開発

概要

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We have proposed an technique for SEA model construction using FEM, which is called 'FEM-SEA'. This technique enables us to construct the SEA model on only computer without test. In this paper, we try to build the FEM-SEA model of an automobile vehicle white body. We use 55 partial FE models which are extracted from the whole FE model and include some subsystems connected along one junction. After the point force dynamic analysis FEM, we calculate the power input and the subsystem energies to determine the intenal and the coupling loss factors by power injection method. It is verified that the constructed model has the ability to predict the response with high accuracy under arbitary excitation condition thorough the comparison with the measured results and the results of FE analysis for the whole body. Moreover, it is demonstrated that the FEM-SEA technique is useful to evaluate the effect of structural modification.
社団法人日本機械学会の論文
2002-09-13