Optimization Design On Steel Crane Girder System Used For Multi-function Crane With Guide

With the rapid development of China’s economy, the demand for aluminum materials is increasing, which brings rapid development to electrolytic aluminum industry. The multi-functional steel crane beam system with guide pulley as one of the main components to electrolytic aluminum plant, due to its poor work environment and the action modes of the vertical and horizontal loads greatly different from those of ordinary cranes, greater difficulty is increased to the structural design. Generally, as the electrolytic aluminum plant is bigger requiring a larger number of crane beams laid, the steel cost of the crane beam system becomes the main limiting factor which influences the project cost of electrolytic aluminum plant. Therefore, the structural optimization design of the multi-functional steel crane beam system with guide pulley takes into effect.This paper, through the ANSYS finite element program, built the plane model and spatial model for the multi-functional crane beam system. By using the optimization module of the ANSYS program, it is to be established the computation model with structural geometric dimensioning as design variable, strength, stiffness, stability and fatigue strength as constraints and the steel consumption of the crane beam system as objective function. Under the respective roles of the different load conditions, firstly use the zero-order method and then use the first-order method to carry on the optimum design to the steel consumption of the multifunctional crane beam system with different spans and different brake structures, obtaining the optimized geometry dimensioning and steel consumption and thereby obtaining the main factors limiting the steel consumption of the crane beam system. And a comparative analysis is carried out for the steel consumption of the crane beam system’s plane model and space model and the main factors controlling the amount of steel consumption. In addition, the brake beam of the multi-purpose crane beam system after optimum design is checked when the side beams are U-steel, auxiliary truss as well as web stiffener grid, and it is resulted that all of them are met with the related specifications.