307 複数の単振子型動吸振器による柔軟構造物の制振解析

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This paper investigates the performance of multiple pendulum-type dynamic absorbers. As well known, when a single dynamic absorber is installed to an elastic structure, although the peak of the structure is suppressed at low amplitudes, two new peaks appear on both sides of the original resonance frequency. In order to suppress these two peaks, an idea of using multiple pendulum-type dynamic absorbers is proposed. In the theoretical analysis, van der Pol's method is employed to determine the frequency response curves considering the nonlinearity of restoring moments of the pendulums when three pendulum-type dynamic absorbers are used. The response curves are compared with those in the case of using a single pendulum-type dynamic absorber. When multiple pendulum-type dynamic absorbers are used and the values of their parameters are changed, Hopf bifurcations may occur, followed by amplitude modulated motion which decreases the performance of absorbers. Bifurcation sets are utilized to determine the optimum lengths of the pendulums by adjusting the lengths of these pendulums.
一般社団法人日本機械学会の論文
2011-09-05