多自由度カーブフィットと用いた人工衛星モデルの振動解析 : 第1報比例粘性減衰と比例構造減衰による減衰のモデル化

概要

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Experimental modal analysis was used to characterize a flexible space structure dynamic model. The satellite scale model was constructed to simulate the low-frequency nature of flexible space structures. The effects of a wire suspension system were investigated to simulate the free-body of orbiting spacecrafts in ground vibration tests. A purpose of this paper is the damping modeling of the damped dynamic system of multi-degree of freedom (MDOF). The MDOF curve fit program was made out to estimate modal parameters of the satellite model. Using modal parameters of the natural frequencies and critical damping ratios, the proportional damping constants were determined and the damping modeling was evaluated. The proportional viscous damping and the proportional hysteretic damping were assumed as damping models. Comparing of these two damping characteristics, it concludes that the proportional hysteretic damping model was appropriate for the present measurements.
東海大学の論文