Numerical study on the dynamic response of a truncated ship-hull structure under asymmetrical slamming

• Published in: Marine structures 2020-07, Vol.72, p.102767-23, Article 102767
• Main Authors: Xie, Hang, Liu, Fang, Tang, Haoyun, Liu, Xinyu
• Format: Article
• Language: English
• Subjects: Asymmetry; CFD method; Deformation; Dynamic analysis; Dynamic characteristics; Dynamic response; Finite element analysis; Finite element method; Loads (forces); Numerical analysis; Numerical prediction; Sea keeping; Ship hulls; Ship motion; Ship-hull structure; Ships; Slamming; Slamming loads; Stress concentration; Stress distribution; Structural design; Structural engineering
• ISSN: 0951-8339; 1873-4170
• DOI: 10.1016/j.marstruc.2020.102767

Dynamic response of ship-hull structure under slamming has tracked widespread attention in the marine structural design. However, our understanding on the dynamic characteristics largely relies on the symmetrical slamming cases. This paper presented a preliminary numerical investigation on the dynamic response of a truncated ship-hull structure under asymmetrical slamming based on the uncoupled CFD-FE method. Asymmetrical slamming loads were predicted through combining the seakeeping analysis and CFD method. In there, three kinds of motions (vertical, horizontal and roll motions) of 2D ship sections were obtained through the seakeeping analysis and then the slamming pressure was predicted through simulating the water entry with various motions based on CFD method. The dynamic response was analyzed through finite element method. Numerical predictions including ship motions, slamming loads and dynamic analysis were validated against published experimental data and numerical calculations. The characteristics of asymmetrical slamming loads were analyzed showing obvious asymmetry in space, and the dynamic characteristic of the ship bow structure was further clarified through discussing the deformation and stress distribution. These results are useful for readers for better understanding the dynamic characteristics of the bow structure under slamming. •A methodology was preliminarily presented to study the characteristic of dynamic response of bow structure under asymmetric impact.•Asymmetrical slamming loads were predicted well by combining the seakeeping analysis and CFD method.•Dynamic characteristic of ship-hull structure under asymmetrical impact was clarified.•Special attention is concentrated on the prediction of asymmetrical pressure in oblique waves.