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基于CFD的钻井船月池流场及附加阻力研究 总被引:1,自引:0,他引:1
研究了基于CFD方法的钻井船月池流场及阻力性能。针对某阶梯型月池的钻井船,采用定常方法分析其阻力性能,并与模型试验结果进行比较,分析钻井船月池阻力数值计算方法的可靠性;采用非定常方法模拟月池内流体的非定常流动,分析月池附加阻力产生的原因。计算方法及所得出的结论可为具有月池的船舶阻力性能研究提供参考。 相似文献
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钻井船是当前海洋工程装备研发的热点,本文考虑月池对钻井船阻力性能的影响,以某245m钻井船为研究对象,采用CFD软件Fine/marine计算不同航速下月池封闭与开敞时钻井船阻力,同时在江苏科技大学拖曳水池中进行缩尺模型试验。通过观察试验现象结合CFVIEW后处理软件,同时对比数值计算和模型试验结果,研究发现:月池开敞时,船身周边流场发生改变,月池内水流周期性剧烈运动形成压力差,导致钻井船阻力增加幅度在25%~30%左右。本文通过探究月池增阻机理,可为钻井船月池设计提供一定的借鉴和参考。 相似文献
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以“大连开拓者”深水钻井船为例,介绍了深水钻井船高压泥浆系统的设计方法,总结了高压泥浆系统在材料选择时需注意的特殊要求,为其他类似海工产品高压泥浆钻井系统的设计提供了经验。 相似文献
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时域仿真分析是获得动力定位控制精度的必要手段。文中进行了SIMO软件理论和应用方面的研究,基于SIMO软件建立动力定位能力时域仿真分析流程;以深水钻井船为算例,通过动力定位系统控制参数和Kalman增益参数的调整,获得较好的计算结果,并进一步分析了控制参数的不同取值对动力定位能力的影响。文中建立的深水钻井船动力定位能力仿真分析流程可以为工程实践提供参考。 相似文献
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[Objective] This paper carries out an experimental study of a multi-function dirllship model with moonpool structure in towing tank, aiming at analyzing the effects of the moonpool structure on the ship resistance in open and closure condition.[Methods]Taking a dirllship as the research object, the ship motion response in regular and irregular waves is investigated. The resistance of the ship in hydrostatic water and waves is measured with tension sensors, and the acceleration characteristics of the bow, midship and stern are analyzed by acceleration sensors.[Results]The results indicate that hull resistance under light load conditions is greater when open moonpool, while hydrostatic water resistance with closed moonpool is greater under design load conditions. The closed moonpool in regular waves reduces stern acceleration by 58.2%, bow resistance by 46.7% and heave response by 41.8%. The peak of resistance at the bow in irregular waves is about ten times higher than that at the stern, and the peak of resistance occurs more often when the moonpool is open at the same time.[Conclusions]The experimental study shows that the difference in load conditions changes the waterplane area and affects the hull resistance in hyrostatic water. In contrast, the closure of the moonpool not only reduces acceleration and resistance, but also improves surge and heave. As such, this paper can provide references for the structural design of drillships with moonpools. © 2023 Journal of Nanjing Agricultural University. All rights reserved. 相似文献
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