Optimization Design Of Bridge Crane Box Girder Based On Structural Bionic Method

The bionic structure optimization design is proposed in this article, in order to adaptingthe fierce modern manufacturing competition, improving the independent innovationcapability, strengthening new design methods and theory application on the crane metalstructure design. Combined with the topology optimization of the main beam, the bionicstructure optimization design is used to optimizing the QD75T/31.5m main beam. The resultsare available for the main beam design and production. A new design concept is provided tobreakthrough the traditional design of the crane. The main contents are as follows:1. It’s explained that the importance of the cranes in the manufacturing industry. It’sreviewed that the development, research directions and modern design methods of the crane.The bionics design ideas, research background are introduced. The purpose and significanceof this research are explained.2. The structure bionic concepts and contents are explained. The structure bionicmethods, processes and mathematical tools are analysis. The problems that need attention inthe process of structural bionic are pointed out. The links between the Bionic and structuraloptimization are explored.3. Firstly, a brief introduction on the optimization object is put forward. Combined withtraditional design ideas, Main beam cross section parameter design, shape choice, loaddetermine, design criteria, design requirements, the type of stiffener layout are discussed.Finite element analysis of the main beam prototype is used based on ANSYS Workbench.The main beam optimal topology is get by weight loss as the objective function topologyoptimization. 4. The bionic prototype was searched based on bionic theory design ideas. It has twobionic prototype, the king lotus and bamboo, that are determined by bionic prototype with themain beam similarity calculations based on the fuzzy similarity theory. The two biomimeticmain beam is established based on two bionic prototype structure and configuration rules andextraction. Analysis and modal analysis of the biomimetic primary beam Statics isestablished.5. The comparison of the two bionic main beam have less weight, more stiffness, morestrength then the prototype of the main beam through their finite element analysis results. It isproved indeed feasible and effective that structure of bionic research in the main beamoptimal design.