A comparison between the experimental and theoretical impact pressures acting on a horizontal quasi-rigid cylinder during vertical water entry

OCEAN ENGINEERING

卷:77

Article

Van Nuffel, D.¹  Vepa, K. S.¹  De Baere, I.¹  Lava, P.²  Kersemans, M.¹  Degrieck, J.¹  De Rouck, J.³  Van Paepegem, W.¹ 

[1] Univ Ghent, Dept Mat Sci & Engn, B-9052 Zwijnaarde, Belgium

[2] Catholic Univ Coll Sint Lieven, B-9000 Ghent, Belgium

[3] Univ Ghent, Dept Coastal Engn, B-9052 Zwijnaarde, Belgium

关键词: Water impact;    Cylinder slamming;    Vertical water entry;   

DOI  :  10.1016/j.oceaneng.2013.11.019

来源: Elsevier

【 摘 要 】

This paper presents a detailed study on the local pressures acting on the surface of a quasi-rigid cylinder during vertical water entry into a flat water surface. This water entry event is an approximation of bottom wave slamming of cylindrical structures, which is a typical problem for many naval constructions. Hence, the results from this research can be used during the design of cylindrical structures in a slamming sensitive environment. The paper shows the impact pressure results of a large set of slamming drop experiments with a cylindrical model, on a rigorously instrumented test set-up using state-of-the-art equipment. The obtained experimental data is compared in detail with the governing theoretical formulations concerning cylinder slamming. For deadrise angles larger than 4.25 degrees, a good agreement is found with an averaged version of the Wagner theory. This indicates that the Wagner theory is a good estimate for impact pressures acting on a horizontal rigid cylinder during vertical water entry, for deadrise angles larger than 4.25 degrees. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free