Rational Design of T-Girders via Finite Element Method

作     者：Ahmed Hammad Yehia Abdel-Nasser Mohamed Shama Ahmed Hammad;Yehia Abdel-Nasser;Mohamed Shama

作者机构：Department of Naval Architecture and Marine EngineeringFaculty of EngineeringAlexandria UniversityAlex andria 21544Egypt 

出 版 物：《Journal of Marine Science and Application》 (船舶与海洋工程学报（英文版）)

年 卷 期：2021年第20卷第2期

页      面：302-316页

核心收录：

学科分类：0707[理学-海洋科学] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0802[工学-机械工程] 082401[工学-船舶与海洋结构物设计制造] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Out-of-plane distortion Finite element modeling Welding residual stresses Fabricated T-girder Section modulus 

摘      要：The main configuration of ship construction consists of standard and fabricated stiffening members,such as T-sections,which are commonly used in *** the welding process,the nonuniform heating and rapid cooling lead to welding imperfections such as out-of-plane distortion and residual *** to these imperfections,the fabricated structural members may not attain their design load,and removing these imperfections will require extra *** present work investigated controlling these imperfections at both the design and fabrication stages.A typical fabricated T-girder was selected to investigate the problem of these imperfections using double-sided welding.A numerical simulation based on finite element modeling(FEM) was used to investigate the effects of geometrical properties and welding sequence on the magnitude of the welding imperfections of the *** FEM results were validated with the experimental measurements of a double-sided fillet *** the design stage,the optimum geometry of the fabricated T-girder was determined based on the minimum steel weight and out-of-plane ***,regarding the fabrication stage,a parametric study with two variables(geometrical properties and welding sequence)was conducted to determine the optimum geometry and welding sequence based on the minimum welding out-of-plane *** the flange thickness and reducing the breadth while keeping the T-girder section modulus constant reduced the T-girder weight and out-of-plane *** welding produced a significant reduction in the out-of-plane distortion,while an insignificant increase in the compressive residual stress occurred.