Abstract
Box girder is an important bearing and force transmitting component in the gondola car body; the rationality of its structure directly affects the life of the whole car body. In order to solve disadvantage of the traditional box girder optimization method, which mainly depends on design experience, the combined method of orthogonal experimental design and the genetic algorithm-back propagation (GA-BP) algorithm is used for the structural optimization of bolster beam in this paper. Nine groups of parameters were established by orthogonal experiment, which can give typical samples for GA-BP optimization. Then, the bolster beam is optimized by the GA-BP algorithm, and the new gondola car body model is established with the optimized parameters. The finite element analysis results show that the minimum stress is found by using the GA-BP algorithm, which is basically consistent with the simulation results. Finally, the results show that the combined method of orthogonal experimental design and GA-BP algorithm is feasible to the box girder optimization of the gondola car body. Meanwhile, the optimization results of bolster beam will provide a reference for the structural design of the heavy haul wagon body.
Highlights
The box girder is generally welding or riveting from the outer plate and the internal stiffened plate, which has good characteristics such as high strength, high rigidity, and light weight
The threedimensional spreading of the tendon force in flanged sections is researched, and a computerbased tool is developed for plotting load paths in 3D bodies, from which the flow of forces in the box girder anchorage zone can be clearly visualized [7]
The study [9] used the initial parameter method to analyze the distortion of supported box girders with an inner diaphragm considering the shear deformation of the diaphragm
Summary
The box girder is generally welding or riveting from the outer plate and the internal stiffened plate, which has good characteristics such as high strength, high rigidity, and light weight. It is widely used in the fields of aerospace, aircraft, ship, railway vehicles, automobiles, machine tools, etc. Many scholars have widely studied the boxed girder structure design. The ultimate strength experiment was performed on different box girders, and the theoretical algorithm of ultimate strength was improved by comparative analysis of the experimental results [10]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
