中小航速下漂移、深度和横向限制对内河船诱导波影响的实验研究

Razgallah
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引用次数: 0

摘要

船浪的研究对于防止冲岸和优化船舶的机动性能具有重要意义。内河船引起的波浪一般受许多因素的影响,这些因素分为与船舶有关的参数(形状、吃水、速度、漂移)和航行环境参数(深度、到岸的距离、航行线与航道中间的偏移量)。本文通过一组拖曳槽试验,描述了这些参数对内河船舶产生的波浪的影响。考虑到实际航行条件,船舶航速的选择符合内河航行航速的规则范围,该范围与实验装置所支持的最大允许航速足够接近。为了研究船型的影响,分别在一艘集装箱船、一艘推驳船和一艘推驳船上进行了试验。本文在两种不同吃水(T =0.1 m和T=0.04 m)条件下进行了研究,并在不同水深(h = 0.24 m和0.12 m)条件下进行了重复研究,通过改变航道宽度(W=2.88 m、1.44 m和0.72 m)研究了侧向约束,特别关注了深度和侧向约束相结合的受限航道的研究。此外,为了确定漂移的影响,施加了3个漂移角(0 ~ 5°)。最后,通过改变偏移距离(偏移量分别为0.44 m和0.55 m)来识别偏心距的影响,并与文献对比验证了船波最大振幅。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study of the Impact of Drift, Depth, and Lateral Restrictions on Inland Ship-Induced Waves under Small and Moderate Ship Speeds
The study of ship-induced waves is essential to prevent bank erosion and optimize the ship’s maneuverability. Inland ship-induced waves are in general affected by many factors divided into ship related parameters (form, draft, speed, drift, and navigation environment parameters (depth, distance to banks, and offset of the sailing line from the channel middle). Based on a set of towing tank experiments, this article depicts the effects of a number of these parameters on inland ship generated waves. To account for real navigation conditions, the ship speed is chosen so as to comply with the regular range of inland navigation speed which is close enough from the maximum allowable speed supported by the experimental setup. To study the effect of ship form, the experiment was carried out on a containership, a pusher-barge and a pusher-two barges. The study is achieved for two different ship’s draft (T =0.1 m and T=0.04 m) and repeated for different configurations of water depth (h between 0.24 m and 0.12 m). The lateral confinement is studied by varying the channel width (W=2.88 m, 1.44 m and 0.72 m). Special attention is paid to the study of a restricted waterway combining both depth and lateral confinement. Besides, to identify the influence of drift, three drift angles were imposed (between 0 and 5°). Finally, the influence of the eccentricity is identified through varying the offset distance (offset = 0.44 m and 0.55 m). The ship wave maximum amplitude is validated by comparison to literature.
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