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Lightweight Design and Verification of Gantry Machining Center Crossbeam Based on structural bionics

Journal of Bionic Engineering 2011年第2期8卷 201-206页

作者： Ling Zhao Jianfeng Ma Wuyi Chen Hongliang Guo School of Automobile and Transportation Engineering Liaocheng University Liaocheng 252059 P. R. China School of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 P. R. China School of Mechanical Engineering and Automation Beihang University Beijing 100191 P. R. China

The lightweight and high efficiency of natural structures are the inexhaustible sources for engineering improvements. The goal of the study is to find innovative solutions for mechanical lightweight design through the application of structural bionic approaches. Giant waterlily leaf ribs and cactus stem are investigated for their optimal framework and superior performance. Their structural characteristics are extracted and used in the bio-inspired design of Lin MC6000 gantry machining center crossbeam. By mimicking analogous network structure, the bionic model is established, which has better load-carrying capacity than conventional distribution. Finite Element Method （FEM） is used for numerical simulation. Results show better specific stiffness of the bionic model, which is increased by 17.36%. Finally the scaled models are fabricated by precision casting for static and dynamic tests. The physical experiments are compared to numerical simulation. The results show that the maximum static deformation of the bionic model is reduced by about 16.22%, with 3.31% weight reduction. In addition, the first four natural frequencies are improved obviously. The structural bionic design is a valuable reference for updating conventional mechanical structures with better performance and less material consumption.

关键词： lightweight design crossbeam structural bionics finite element method giant waterlily leaf

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