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＜紀要論文＞
ESTIMATION OF NATURAL FREQUENCIES OF TORSIONAL VIBRATION OF SHIPS
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| 概要 | The characteristic values of the torsional vibration of the beam of variable cross section and with variable mass distributions like as ship's form are computed from the solutions of the fundamental e...quation, and the estimation formula of the criticals of the torsional vibration of a ship's hull by the use of the computed one is presented. The effects of the deck openings upon the torsional rigidity and of the virtual inertia of the entrained water mass in the case of torsional vibration on the natural fequencies are taken into account. The results of calculations are compared with measured ones in two types of cargo vessels.続きを見る |
| 目次 | 1. Introduction. 2. Calculations of Natural Frequency of Torsional Vibration of Ships. 3. Distributions of Torsional Rigidity and Polar Mass Moment of Inertia and Determination of Characteristic Value. 4. Effective Torsional Rigidity. 5. Radius of Gyration of Polar Mass Moment of Inertia of Datum Section of Hull. 6. Virtual Inertia of Entrained Water Mass in the Torsional Vibration of Ship. 7. Comparisons of Natural Frequencies of Cargo Ships obtained by the above Calculations and Measured Ones. 8. Conclusions. Appendix[Solutions of Torsional Vibration of Beam of Variable Cross Section with Variable Mass] |
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| 登録日 | 2023.12.18 |
| 更新日 | 2024.10.22 |