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首页> 外文期刊>Ocean Engineering >Investigation of the radial bearing force developed during actual ship operations. Part 1: Straight ahead sailing and turning maneuvers
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Investigation of the radial bearing force developed during actual ship operations. Part 1: Straight ahead sailing and turning maneuvers

机译：研究在实际船舶操作过程中产生的径向轴承力。第1部分：直行航行和转弯演习

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摘要

The quantification of the radial force exerted by the propeller is of paramount importance for the improvement of the design procedures as well as for enhancing the prediction of the controllability and maneuvering qualities of oceangoing vessels. In this work the radial load experienced by the bearing strut of a twin screw configuration is experimentally investigated by free running model tests carried out at the CNR-INSEAN outdoor maneuvering basin. To this purpose the model has been equipped with a novel, in-house developed, two-component transducer. Results obtained for the straight ahead motion for a large range of speeds (0.05 ＜ F_N ＜ 0.425) and turning circle maneuvers at different rudder angles (15°-35°) and three different speeds (F_N=0.218,0.32 and 0.35) are presented and discussed in this paper. The main task is also to identify, from a phenomenological perspective, the nature of this load, in particular during tight maneuvers, characterized by critical overloading of the propellers. The use of the free running, self-propelled model, is the best way to gain a deeper insight on the loads generated by the propeller during quasi-steady and, especially, transient motions that are difficult to reproduce in a towing tank via captive model tests.
机译：螺旋桨施加的径向力的量化对于改进设计程序以及增强对远洋船的可控性和操纵质量的预测至关重要。在这项工作中，通过在CNR-INSEAN户外操纵盆上进行的自由运行模型试验，对双螺杆结构的轴承支柱承受的径向载荷进行了实验研究。为此，该模型已配备了新型的，内部开发的两成分换能器。给出了在较大的速度范围（0.05 ＜F_N ＜0.425）以及在不同的舵角（15°-35°）和三种不同的速度（F_N = 0.218,0.32和0.35）的直行运动下获得的结果并在本文中进行了讨论。从现象学的角度来看，主要任务也是确定这种载荷的性质，特别是在以螺旋桨严重超载为特征的严密操纵过程中。使用自由运行的自行式模型是深入了解螺旋桨在准稳态期间产生的载荷的最佳方法，尤其是难以通过俘获模型在牵引罐中再现的瞬态运动测试。

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