ピッチング励振を受ける円筒容器内液面の周波数応答解析

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  • Frequency Response of Sloshing in a Circular Cylinirical Tank Subjected to Pitching Excitation.
  • ピッチング レイシン オ ウケル エントウ ヨウキナイ エキメン ノ シュウハ

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Frequency responses of stable planar and rotary motions in a partially tilled circular cylindirical tank, subjected to a pitching excitation at a frequency in the neighborhood of the lowest resonant frequency, are investigated. The nonlinearity of the liquid surface oscillation and the nonlinear coupling between the dominant modes and other modes(e.g., an axisymmetric mode) are considered in the response analysis of the sloshing motion. The equations governing the amplitude of those two types of liquid surface motions are derived and the stability analysis of each motion is conducted. An experiment was carried out using a model tank. Good agreement was found between the theoretical and experimental results. It is shown that the nonlinear analysis is important for estimating the sloshing responses.

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