Basic Research on Vibration and Noise of Internal Combustion Engine : 1st Report, Vibration Analysis of the Piston-Crank System I

概要

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By way of basic research on vibration and noise of internal combustion engines, the vibration analysis of the piston-crank system of an engine is made. The piston-crank system is composed of three substructures, namely a piston, a connecting rod, and a combined system of a crankshaft and a flywheel. The transfer functions of each substructure are obtained by the reduced impedance method and so on. The transfer functions of a bearing, which is a boundary part between one substructure and another, are obtained experimentally by the harmonic exciting test. Natural frequencies, natural modes and transfer functions of the whole body are determined with the transfer functions of each substructure and bearing parts by the building block approach. The calculated results agree well with experimental ones.
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