Forced Vibration of a One-degree-of-freedom System with Unsymmetrical Viscous Damping

概要

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The forced vibration of a one-degree-of-freedom system with an unsymmetrical viscous damper was analyzed theoretically by a rigorous method, and the calculation was made for the following two cases : a) c_1=0.2 c_c, c_2=0.8 c_c, b) c_1=0,c_2=c_c, where c_c is the critical damping coefficient. The numerical results obtained show (1) that the neutral line of the vibration of such a system has a tendency of shifting to the direction in which the damping is weak, and also a tendency of the amount of the shifting growing with the frequency of the forced vibration as well as with an increase in the ratio of damping on rebound stroke to that on compression stroke, and (2) that the acceleration warps considerably in the shape of its wave These results were also ascertained by an experiment carried out with a system equipped with a damper which works on the stroke in one direction only.
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