Mendeley出力
＜紀要論文＞
DAMPING FACTORS IN THE HIGHER MODES OF SHIP VIBRATION
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| 概要 | An analysis is made of damping factors in the higher modes of ship vibration. The solutions of the fundamental equation of the vibration of the uniform beam taking into account the effects of shear de...flection, rotational inertia, internal damping force due to both normal and tangential viscosities of a ship structure and the external damping force are obtained. The damping factors represented by logarithmic decrement in ship vibrations including higher modes are calculated from the solutions under the assumption of some numerical values of the damping coefficients. Some of the damping factors measured from actual ships are compared with those obtained by the present theory. The empirical formula for estimating the damping factors in the higher modes of the hull vibration suggested by Dr. J. Lockwood Taylor is confirmed by the present theory.続きを見る |
| 目次 | Introduction. 1. Theoretical investigation into the internal damping factors of ship structures. 2. The result of the measurement of external damping factor by model tests. 3. The damping coefficient due to tangential viscosity obtained from the results of measurements of torsional vibration on a tanker. 4. Damping factors in vertical vibration already measured on actual ships. 5. Numerical Example. Conclusions. |
詳細
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| 登録日 | 2024.01.23 |
| 更新日 | 2024.10.22 |