Research On Rapid Lightweight Design Of Bridge Crane Box Girder

Crane is very important in the production of modern transport tools and widely used invarious fields of production activities. Overhead traveling crane as one of the most commontype crane which can improve work efficiency largely with excellent stability and safeperformance. Box main girder is served as the major component that plays a decisive role forthe safety and economy of the bridge crane. For the moment, the crane box girder alwaysexists problem of the cumbersome deadweight and serious material waste that seriouslyhindered the development of the crane application.In this paper, bridge crane box girder is taken as the study object, a new design methodthat combined rapid design and lightweight design was put forward, which effectivelyimproves the design efficiency of bridge crane box girder. This article realized rapidlightweight design of bridge crane box girder. The main contents are followed:(1) To GB/T3811-2008and the new edition of crane design manual as the basis oftheoretical，researched the main beam section design and related check calculations, realizedthe parameters rapid design calculations of traveling crane main beam. This paper realized theparameterized design for overhead traveling crane combined with database technology basedon parameterized design method and CAD.(2) With the study on simple Genetic Algorithm and the mechanism of its defects, animproved Quantum Genetic Algorithm(IQGA) is proposed based on traditional QGA. And thefeasibility of the improved algorithm is verified by standard test functions. At the same time,the improved algorithm is applied to the cross-section optimization of overhead crane girder,realized the purpose of reduce the weight under the premise that satisfy the constraintconditions, and verified the effectiveness of the improved genetic algorithm.(3)The system of rapid lightweight design for bridge crane box girders is developed toachieve the integrated research contents and methods interactively, applying database development technology and modularization parametric technology realized independentoperation of the system based on Visual Basic platform. In accord with the actual productionof the enterprise, the system of rapid lightweight design for bridge crane box girders improvesthe design efficiency and design quality of the bridge crane box girders. Through a designcase shows the feasibility and reasonability of research contents of this paper.