1. School of Mechanical & Automotive Engineering, South China University of Technology,Guangzhou 510641;
2. Foshan Nanhai Zhongnan Machinery Co. Ltd, Foshan 528247
Abstract：In order to satisfy the performance requirement of the dynamic and static stiffness of machining center and minimize weight. A composite optimization method is proposed to study a design of machining center which involves multi-variable, multi-constraint and multi-objective.By combining finite element analysis with modal test, the performance of the dynamic and static is identified, proving the accuracy of finite element model.then, the maximum deformation and stress of the parts is obtained by static analysis based on the finite element model. Taking the compliance as goal, Topology optimization is adopted to design the shape of column structure framework; Taking the natural frequency as goal, Adaptive dynamic optimization method based on unit structure is used to design the rib structure of machining center; Taking the quality and natural frequency as goal, Response Surface Methodology is used to determine the optimal size and the best thickness of structure. Finally, the performance of the dynamic and static is analyzed、checked and optimized after the parts of machining center are assembled, the results of the analysis show that the weight of maching center was reduced from 12749kg to 12127kg,reduced by 4.9%. the results show the method has high precision and strong practicability
2012, Vol. 31 
