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水翼辅助推进船舶波浪中运动和增阻特性研究 被引量:3
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作者 祝美霞 马宁 顾解忡 《船舶工程》 北大核心 2014年第2期20-24,共5页
基于在船首两侧增添(固定)水翼的水翼辅助推进船舶的设想,选取集装箱船型作为研究对象,采用三维面元法对原型和水翼船在规则波中的运动和增阻响应进行了预报,并与试验结果进行比较,验证了计算结果的准确性。研究结果表明水翼能够有效地... 基于在船首两侧增添(固定)水翼的水翼辅助推进船舶的设想,选取集装箱船型作为研究对象,采用三维面元法对原型和水翼船在规则波中的运动和增阻响应进行了预报,并与试验结果进行比较,验证了计算结果的准确性。研究结果表明水翼能够有效地减小船舶在波浪中的纵摇、垂荡和增阻响应,其中添加水翼船在波浪中的纵摇和垂荡响应峰值分别减少了21%和24%,而增阻响应则减小了80%。此外还对水翼展弦比和安装位置对船舶在波浪中的运动和增阻响应的影响进行了研究。 展开更多
关键词 水翼辅助推进船舶 波浪中运动 波浪增阻 振荡水翼
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紊流场中水翼的涡激振动分析
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作者 张效慈 司马灿 《船舶力学》 EI 2000年第3期15-24,共10页
本文提出一种新的置于船尾流中水翼涡激振动的数值模拟方法,以湍流粘性系数代替运动粘性系数,将Oseen奇异子片分布在二维水翼型线上,取Oseen奇异子边界元法解作为NS方程的迭代初值,这种方法使得Oseen奇异子边界元... 本文提出一种新的置于船尾流中水翼涡激振动的数值模拟方法,以湍流粘性系数代替运动粘性系数,将Oseen奇异子片分布在二维水翼型线上,取Oseen奇异子边界元法解作为NS方程的迭代初值,这种方法使得Oseen奇异子边界元法与水域有限差分法的组合行之有效。模拟计算解释了水翼处在尾流场中会因参数设置不当产生发散的或等幅的涡激振动,并被试验从定性上核证。 展开更多
关键词 船舶水翼 涡激振动 Oseen奇异子 湍流粘性系数
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The Applicability of Hydrofoils as a Ship Control Device 被引量:1
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作者 Md. Shamim Mahmud 《Journal of Marine Science and Application》 CSCD 2015年第3期244-249,共6页
Centrifugal forces are commonly created when ships turn, which may cause a ship to capsize in a critical situation. A mathematical model has been developed to optimize the stability coefficients for ship, with the aim... Centrifugal forces are commonly created when ships turn, which may cause a ship to capsize in a critical situation. A mathematical model has been developed to optimize the stability coefficients for ship, with the aim to prevent capsizing and to increase ship maneuverability in high-speed water craft. This model can be used to develop algorithms for control system improvement. The mathematical model presented in this paper optimized the use of multipurpose hydrofoils to reduce heeling and the trimming moment, maintaining an upright ship’s position and lessening the resistance via transverse force. Conventionally, the trimming and heeling of a ship are controlled using ballast water;however, under variable sea conditions it is sometimes difficult to control a ship’s motion using ballast water. In this case, a hydrofoil would be more stable and maneuverable than a ballast tank controlled vessel. A movable hydrofoil could theoretically be adapted from moveable aerofoil technology. This study proves the merit of further investigation into this possibility. 展开更多
关键词 HYDROFOIL ship roll stabilization TRIM rudder-roll damping center of flotation NACA foil section ship capsize gear system instability capsizing moment
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