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http://dx.doi.org/10.5394/KINPR.2015.39.1.77

An Experimental Study on the Slamming impact around Wedged type structure in accordance with the Weight and Height of the change  

Oh, Seung-Jin (Saenuri, Training Ship, Mokpo National Maritime University)
Jo, Dae-Hawn (Division of Marine Engineering, Mokpo National Maritime University)
Publication Information
Journal of Navigation and Port Research / v.39, no.1, 2015 , pp. 77-82 More about this Journal
Abstract
Slamming means that the hull hits the waves and receives impact pressure. This slamming effect may cause harm to people and when you put the hull at risk. so it is very harmful for cargo safety. Therefor slamming impact pressure should be fully considered in ship designing. In this study the model of wedged type structure are produced aimed to simulate a free fall that the experiments were carried out on different weight and free fall height. The flow field has been obtained by 2-frame grey level cross correlation PIV(Particle Image Velocimetry) method and experiment was divided into water entry and water exit. The impact pressure of free fall structure by a pressure acquisition system apply to dewetron system. The angles between a model and the water surface are adapted $15^{\circ}$ respectively. The weight change of models was given as 1.5, 1.8 and 2.0kg. To study slamming phenomenon for free fall height the experiments were carried out by the free fall height of 100, 200 and 300mm. The experimental value of the impact pressure according to the changes in weight was increase impact pressure in proportion to the increase in weight and higher free falling height has also influenced the increase in impact pressures.
Keywords
Slamming; Impact pressure; Free fall; Flow field; Water entry; Water exit; Water surface;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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