歯車騒音の放射パワーの推定に関する研究 : 第4報, 軸一体円板の三次元方向加振状態への音響放射パワー推定基礎理論の拡張

概要

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In establishing an effective method for accurately estimating the frequency spectrum of noise power radiated from gears, a basic theory was proposed in previous papers. The associated equations were derived to apply the theory to a circular plate with a solid shaft chosen as a simple model of gear bodies. Exciting the circular plate in the direction of the shaft, the radiated sound power was estimated. It compared favourably with the measured values. In this paper, the basic theory is extended to estimate the sound power radiated when the circular plate is excited in the direction normal to the tooth surface of helical gears, namely in a spatial, three-dimensional direction. Decomposing the exciting force into the axial force, radial and circumferential bending moments, the natural modes of flexural vibration of the circular plate are theoretically analysed. Using the results, the new equation of driving point mobility, which is one of the three parameters required for estimation, is derived. Also, it is shown that the other two equations of total loss factor and radiation loss factor are applicable in the same from as previously derived.
一般社団法人日本機械学会の論文
1992-08-25