被加振系の動特性がインパルス加振力特性値におよぼす影響

概要

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In this paper, the generation behaviour of the exciting force in impulse response testing is observed theoretically and experimentally taking the dynamic characteristics of mechanical structures into consideration. And influences of structural parameters such as mass, damping, and stiffness on the exciting force are made clear. And then the effective control method of the hammer velocity is proposed from the viewpoint of the practical transient excitation. The following results are found. The maximum force, the duration, and the impulse of the exciting force are mainly influenced by the stiffness and the mass of vibratory systems, and the system damping has smaller effects on them. The impulse is affected mostly by the structural stiffness and the mass, and it is enlarged by the increase in the stiffness and reduced by the decrease in the mass. The hammer velocity is the most important and effective factor in controlling the impulse, and the impulse can be kept constant by adjusting it without change of other hammer parameters. By applying the Hertz's contact theory in the excitation process, it is proved that the analysis proposed can be effective for considering the setup parameters of exciting conditions with no reliances on sensuous and empirical knowledge of experimenters.
公益社団法人精密工学会の論文
1992-05-05