Collapse mechanism analysis of stiffeners on transverse floors in a shoal grounding course of a double bottom tanker
YU Zhao-long 1, HU Zhi-qiang 1, 2, LIU Yi 1, WANG Ge 3
1. State Key Lab of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200030, China；2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China； 3. ABS Greater China Division, Shanghai 200003, China
Abstract：Plastic theory and numerical simulations are used to discuss the deformation patterns and the collapse mechanism of stiffeners on the transverse floors in a shoal grounding scenario of a double bottom tanker. In the study, numerical simulation code LS_DYNA is used to calculatethe deformation patterns and energy dissipation, and a mathematical model of the deformed stiffener is built. Using the upper bound theory, a MATLAB program is developed to solve the governing equations and to obtain the distortion energy and mean grounding resistances. The results are verified against the numerical results at last. The proposed theoretical model could be a reference toassessments ofship crashworthiness during its design phase.
2014, Vol. 33 
