内燃機関の振動と騒音に関する基礎的研究 : 第3報,シリンダブロック・クランク軸結合系の音響解析

概要

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The space distribution and frequency spectrum of the sound pressure and acoustic intensity emitted from the outer surface of an internal combustion engine are analyzed by both the boundary element method and the usual simple method. The experimental value of the vibrational velocity of the outer surface of the cylinder block when a piston head is excited is used as the input data of the above calculation. The sound pressure and acoustic intensity around the actual engine are measured by the vibration test when a piston head is excited with harmonic force under conditions of a nonreflective room. Accuracy of the calculated results, both by the boundary element method and by the usual simple method, are investigated by comparing them with the experimental results.
1986-04-25