Numerical Simulation And Design Optimization Of Precision Machine Tools And High-Speed Railway Train Body

With the rapid layout of equipment manufacturing industry, it is urgent for our country to tackle key technological problems and grasp core technology, to achieve a number of new technology with independent intellectual property in the field of heavy machinery, nuclear power, high-speed train, aerospace, advanced CNC machine tool and ocean engineering. In this dissertation, firstly, structural analysis and design optimization of the precision CNC machining center are proposed. Then, finite element analysis, strength and stiffness evaluation, optimization design of some parts of a new generation high-speed train body are given.On the basis of three-dimensional model of the precision CNC machining center, reasonable simplification is performed by using PROE. Load scheme are presented for CNC machining center by studying its work environment. Finite element analysis of Pillar and whole engine structure are given by PROE and ANSYS -WORKBENCH. Based on it, size optimization, topology optimization and detailed design are presented. General Performances of CNC machining center are improved.By abstracting three-dimension geometric solid model of the new generation high-speed EMU to surface model with HYPERMESH, the finite element model with shell elements is built. Also, rigid elements on local loads and boundary conditions are used. Strength analysis of typical load cases, natural frequency and modal analysis are performed. Evaluation of the overall strength and stiffness are given. In addition, structural optimization of local stress concentration regions is performed, and the strength and service life of train body will be increased..Numerical simulation and optimization technology for precision CNC machining center and high-speed train in this dissertation provide valuable reference for practical engineering design.