Experimental numerical and analytical analysis of the penetration of a scaled double-hull tanker side structure. (July 2021)

• Record Type: Journal Article
• Authors: Liu, Bin; Wang, Gang; Chen, Baiqiao; Guedes Soares, C.
• Is Part Of: Marine structures. Volume 78(2021)
• Publication Date: 2021-07
• Subjects: Double hulls -- Ship side collision -- Experiment -- Finite element simulation -- Force-displacement response -- Deformation shape; Naval architecture -- Periodicals; Offshore structures -- Periodicals; Architecture navale -- Périodiques; Structures offshore -- Périodiques; Naval architecture; Offshore structures; Periodicals; 620.4162
• DOI: 10.1016/j.marstruc.2021.103018
• Languages: English
• ISSNs: 0951-8339

Abstract

Abstract: The paper presents experimental, numerical and analytical analyses of a small-scale double-hull structure quasi-statically punched at the mid-span by a rigid flat edge indenter, to examine its energy-absorbing mechanism and fracture. The present study aims to further validate the numerical analysis procedure and the analytical method of individual stiffened panels and web girders against the experiment of the double-hull structure. The specimen, scaled from a tanker's double side structure, includes three spans between the web frames and two spans between the stringers. The paper provides practical information to estimate the extent of structural damage within ship sides during collision accidents. The experimentally obtained force-displacement response and deformation shape show a good agreement with the simulations performed by the explicit LS-DYNA finite element solver. The analysis of the double-hull structure demonstrates the accuracy of the procedure for identifying standard inputs used in numerical codes, in particular the definition of material plastic hardening and the calibration of the critical failure strain by tensile test simulation. The experimental and numerical results are used to validate the analytical method proposed in previous investigations at the plastic deformation stage and a revised semi-analytical method is proposed in the present study for the large penetration stage. Highlights: A double-hull model punched by a rigid flat edge indenter is studied experimentally, numerically and analytically. The specimen, includes three spans between the web frames and two spans between the stringers. Experimentally obtained force–displacement response shows a good agreement with the results of LS-DYNA FEM. The experimental and numerical results are used to validate the analytical method proposed here.