CAD Structural Optimization of Large Cantilever Girders on Cranes

Abstract

The paper deals with the structural optimization of the cantilever girder. Standard CAD optimization tool is used for the model of the main girder on a large jib crane. The objective function is the minimum weight of the girder subjected to the given payload, while constraint functions are postulated according to the usual structural rules and regulations. The illustrative example shows an easy way of optimization which can be used in everyday CAD designing practice. It gives practical recommendations in the selection of variable parameters. The obtained results indicate that the algorithm is time-saving when compared to the analytical approach, especially when variability of the section needs to be included in the design.