加振周波数の変動範囲を考慮した動吸振器の設計法 : 一般的な加振力および評価関数の場合(機械力学,計測,自動制御)

抄録

New optimum design methods for dynamic vibration absorbers are proposed for the cases when the primary system has some uncertainty in dynamic characteristics and excitation frequency fluctuates in small range. In the previous paper, we derived analytical and very simple design equations which give the optimum natural frequency and damping ratio of the absorber for given excitation frequency range in the special case that the excitation force amplitude is proportional to the square of the frequency and the objective function is velocity amplitude. In this paper, approximate design method of the dynamic vibration absorbers for general excitation force and general objective function is discussed. Two different types of the approximate design equation are proposed and calculation results by using the proposed design methods are compared with the exact solution by using numerical method. Through the discussion it can be seen that the proposed design methods are very useful.