Experimental characterization on slamming loads of a truncated ship bow under asymmetrical impact

被引:9
作者
Xie, Hang [1 ]
Dai, Xiangli [1 ]
Ren, Huilong [2 ]
Liu, Fang [1 ]
机构
[1] Huanghuai Univ, Sch Intelligent Mfg, Zhumadian, Peoples R China
[2] Harbin Engn Univ, Coll Shipbldg Engn, Harbin, Peoples R China
基金
中国国家自然科学基金;
关键词
Asymmetrical impact; Ship bow; Drop test; Slamming loads; OBLIQUE WATER ENTRY; WEDGE; SIMULATION; SECTION;
D O I
10.1016/j.oceaneng.2023.115195
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Due to the complex three-dimensional flows such as fluid separation, fluid breaking and bubble flows, accurate prediction of slamming loads on 3D ship bow is still limited. In this paper, the asymmetrical slamming load characteristics of a truncated ship bow under the combination of heel and pitch postures are clarified through drop experiment. An angle device designed in the experiment has effectively adjusted the heel and pitch posture of the test model independently. The study provides a complete dataset (water entry velocity and pressure), which provides reference for future numerical verifications. Load characteristics of bow impact under asymmetrical water entry attitudes are analysed. The results show that some air cavity and jet flows are easy to cause the multiple pressure peaks, and affect the pressure oscillation. The influence of heel and pitch angles on impact pressure is further discussed. Finally, load characteristics with different water entry velocities are discussed to further improve its application. Results find that some abnormal pressure characteristics appear in some locations, that is, the pressure decreases with the increment of water entry velocity. The research results are expected to lay a foundation for further improving the predicting accuracy of hull slamming loads.
引用
收藏
页数:21
相关论文
共 44 条
[41]   Numerical simulation of oblique water entry of an asymmetrical wedge [J].
Xu, G. D. ;
Duan, W. Y. ;
Wu, G. X. .
OCEAN ENGINEERING, 2008, 35 (16) :1597-1603
[42]   Numerical study on the dynamic response of the large containership's bow structure under slamming pressures [J].
Yang, Bin ;
Wang, De-yu .
MARINE STRUCTURES, 2018, 61 :524-539
[43]   Hydroelastic analysis on water entry of a constant-velocity wedge with stiffened panels [J].
Yu, Pengyao ;
Li, Hui ;
Ong, Muk Chen .
MARINE STRUCTURES, 2019, 63 :215-238
[44]   WATER ENTRY OF 2-DIMENSIONAL BODIES [J].
ZHAO, R ;
FALTINSEN, O .
JOURNAL OF FLUID MECHANICS, 1993, 246 :593-612