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游艇码头进港航道水域尺度探讨 总被引:1,自引:0,他引:1
为了填补国内游艇码头在航行水域安全尺度方面的空缺,参考国外游艇码头尺度标准和国内相关研究成果,通过分析风、浪、流等因素对游艇的影响,提出游艇码头的进港航道宽度及水深的计算模型。 相似文献
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为了解决国内游艇码头在泊位尺度方面的空缺,参考国外游艇码头尺度标准和国内相关研究成果,提出游艇的泊位长度、宽度、水深的计算模型。 相似文献
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为了解决国内游艇码头在泊位尺度方面的空缺,参考国外游艇码头尺度标准和国内相关研究成果,提出游艇的泊位长度、宽度、水深的计算模型. 相似文献
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为了解决国内游艇码头在泊位尺度方面的空缺,参考国外游艇码头尺度标准和国内相关研究成果,针对游艇这一特殊船舶,提出了适合于游艇停泊水域的关于泊位长度、宽度、水深的尺度计算方法,并对所提出的计算方法进行了合理性验证,这些计算方法对国内游艇码头的建设有一定的指导作用. 相似文献
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通过对玉环大麦屿货运码头加固和改造设计,提升码头靠泊等级。对码头泊位长度、码头前沿水深、泊位作业标准和平面水域等进行全面论证,对码头水工建筑物的设计荷载、结构内力进行复核计算。 相似文献
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进行港口设计时,针对选定的船型,码头泊位满足设计的长度,港池、航道水深满足设计的水深时,船舶进出港口航道、系泊码头进行装卸作业才能保证安全。 相似文献
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分析集装箱船舶大型化所带来的港口水深、码头设施、堆场、起重机能力和内陆集疏运等一系列问题,认为应从运输系统全面考虑,把集装箱船舶尺度控制在经济效益最佳所对应的范围内。 相似文献
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合理确定的码头前沿设计水深,既能满足船舶安全作业的要求,又能使码头达到预期的运营效果。本文根据现行规范的要求,并结合实际工程项目,对大型开敞式码头前沿设计水深的计算进行了探讨。 相似文献
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穿浪双体船在风浪中高速航行时纵向运动性能恶化是影响其适航性和安全性的主要问题。本文提出一种拖曳水池试验样机研制方案,由船模姿态检测系统、控制与数据采集系统和伺服系统与执行机构三部分构成闭环控制系统。基于样机总体技术指标要求,给出了样机各部分技术指标要求和功能需求,并进行了初步设计。基于该方案研制的试验样机,能够在拖曳水池试验中验证基于穿浪双体船纵向运动控制系统原理的正确性和有效性。 相似文献
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Catamaran vessels operating at high-speed can be exposed to deck diving and bow damage and one resolution of this problem is the wave-piercer design of INCAT Tasmania. Owing to the complexity of the unsteady non-linear flow in the bow area during large wave encounter model testing has been undertaken to identify the peak dynamic slam loads on the ship structure. This paper provides experimental benchmark information relating to the wave slam loads on wave-piercing catamaran ferries. Since the time frames of transient slam loadings and whipping vibration of the entire hull in its first bending mode are similar it is important that the test model replicates the whipping response and therefore needs to be a hydro-elastic model. A 2.5 m hydro-elastic segmented catamaran model has been developed based on the 112 m INCAT Tasmania wave-piercer catamaran to establish the peak wave slamming loads acting on the full-scale vessel. Towing tank tests were performed in regular seas at a maximum full-scale operating speed of 38 knots. The model was instrumented to measure the dynamic slam loads acting on the centre bow and vertical bending moments acting in the demihulls of the catamaran model as a function of wave frequency and wave height. Peak slam loads measured on the centre bow were found to approach the total weight of the model, this being a broadly similar result to the peak loads measured at full-scale. It was found that global dimensionless heave and pitch accelerations peaked in the same range of encounter frequency as did the peak slam load. 相似文献
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基于在线仿真的穿浪船推进智能控制及系统优化研究 总被引:1,自引:0,他引:1
为了增加优化过程的实时性,本文提出了一种基于在线仿真的穿浪船可调桨推进智能控制及其系统优化方法。首先建立了可调桨推进的数学模型,再以MATLAB为平台,使用其仿真软件Simulink建立了仿真模型,又使用查表模糊控制器实现了对穿浪船可调桨推进的智能控制。然后,建立了系统优化的数学模型。基于仿真模型,应用MATLAB的遗传算法工具箱GAOT实现了该系统的优化设计。最后给出了算例。计算结果表明:仿真和优化的准确性和可靠性都较好,该方法是有效且可行的。 相似文献
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针对在改善高速轻型穿浪双体船(WPC)迎浪中波长与船长接近时纵向运动幅度较大的缺点,采用了理论计算与模型试验相结合的方法,对250 t级穿浪双体船开展了水翼改善纵向运动的理论和试验研究,分析了水翼形式、尺度和安装位置等对纵向运动的影响规律。数值计算和试验结果的比较表明,计及水翼—船体水动力干扰影响的切片理论可满足WPC加水翼后波浪中纵向运动计算的需要,但在纵向运动响应峰值处数值计算结果偏高。模型试验表明,250 t级WPC加装水翼后,迎浪纵摇和垂荡有义幅值可减少20%~30%。 相似文献
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本文针对高原水域用双体滑行艇的特殊问题,总结归纳了设计、试验中的有效措施及研究结果,着重讨论了高海拔水域双体滑行艇总体设计和船、机、桨匹配中应注意的问题。 相似文献
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URANS simulations of catamaran interference in shallow water 总被引:1,自引:0,他引:1
Teresa Castiglione Wei He Frederick Stern Sergio Bova 《Journal of Marine Science and Technology》2014,19(1):33-51
This paper investigates the interference effects of wave systems on a multi-hull vessel in shallow water. A numerical analysis is made using the URANS code CFDSHIP-Iowa V.4 on the DELFT Catamaran model 372. The test matrix for numerical computations includes two separation distances (s = 0.17; 0.23) and the depth values of h/T = 8.2, 2.5 and 2, at several speeds ranging within Fr H = 0.775–1.739. Numerical results are compared with the experimental data of the Bulgarian Ship Hydrodynamic Center, and verification and validation for resistance, sinkage and trim are also performed. Results show that, at critical speed (Fr H ≈ 1), the presence of a finite depth significantly affects the catamaran total resistance, which, in shallower water, increases considerably with respect to deep water. At low h/T, small effects of the water depth on resistance occur at subcritical and supercritical speeds. The interference effects seem to be more relevant in shallow, rather than in deep water, with maximum IF values registered at critical speeds (Fr H ≈ 1). Similarly to deep water, the lower the separation distance the greater the interference value. Moreover, in shallow water some negative interference is observed at Fr > 0.5. Wave patterns and wave profiles are analyzed and a comparison is made between several configurations of catamaran and a mono-hull vessel, in order to analyze how water depth and separation distance determine resistance and interference. Finally, a vortex instability study is also included. 相似文献