Mendeley出力
＜紀要論文＞
曳航船の曳索に生ずる張力及び繫船浮標用錨鎻に生ずる張力
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| 概要 | In the fore part of this paper the author discussed the tension occurred in the towing hawser of ships when they meet regular waves and gusts, assuming that the profile of the towing hawser is a caten...ary curve and the weight of the hawser per unit length is constant, and neglecting water resistances to the motions of the hawser in water, and the following results are obtained: If so long heavy hawser as T/T_e is very large, where T is a period of free oscillation of the hawser and T_e is a period of encounter of ships and waves, is used, the tension in the hawser is affected only by winds but by no wave, and even this winds' effect is safely so small as the hawser can not be cut off， whereas the tension in a short light hawser is much affected by both waves and winds, and especially, if T/T_e is unity, the tension is steeply augumented from time to time, and finally the hawser will be cut off, but even their effects either can be minimuzed by adjusting the phase difference between the towing and towed ships to the encounter waves, or can be free from the synchronism between T and T_e, by changing the length of the hawser, the speed and course of the towing ships. It is cleared up that in all cases the smaller towing ship is used, the smaller the effects of waves and winds on the tension in the hawser is. In the after part of this paper the author discussed similarly as above the tension occurred in the chain cables of mooring buoys when ships moored in sea of son1e depth of water meet regular waves and gusts, and the following results are obtained: If so large heavy chain cables as T/T_ω is very large, where T is a period of free oscillation of the chain cables and T_ω is a period of waves, is used, the tension in the chain cables is affected only by winds but by no wave, whereas the tension in short light chain cables is much affected by both waves and winds, and especially, if T/T_ω unity, the tension is steeply augumented from time to time, and finally they will be cut off. It is therefore advisable to use as large heavy chain dables as possible in order to _be free from the cutting off.続きを見る |
| 目次 | 緒言 Ⅰ. 曳航船の曳索に生ずる張力 Ⅱ. 繋船浮標用錨鎖に生ずる張力 Ⅲ. 結論 附錄Ⅰ 懸垂曲線をなせる曳索の伸縮と曳索中に生ずる張力の變化との關係 附錄Ⅱ 波と船との出會週期 |
詳細
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| 登録日 | 2023.10.20 |
| 更新日 | 2023.10.24 |