Topology Optimization Design For The Parts Of Rail Vehicles Based On Hyperworks

With the development of technology, topology optimization of structure(including stress, natural frequency, mode shapes, damping, stiffness and mass distribution, etc.) are more and more concerned by people, and the focus on the research mainly concentrated in engineering applications.Recently, with the rapid development of rail vehicle industry, R & D structure of the new vehicles need to meet much more performance requirements. In order to provide better design ideas and solutions to the designers, the parts of rail vehicles are designed by kinds of topology optimization method based on Optistruct optimization platform of HyperWorks in this paper, which the method is combined with sub-structure analysis technology during body optimization process. It reduces duplication of modeling work, save computing time and improve the optimization efficiency under condition of the limited resources, in order to achieve rapid solve practical problems. The main contents are as follows:1. The FEM of ATP hanging beam of EMU bogie is created in HyperMesh software. The model is constrained by boundry conditions same as the fact, and it is solved under the static force condition and mode shapes condition.The optimization model of ATP hanging beam is defined, which the design variable is element density, the objective function is the maxmium of the first natural frequency, the constraints are volume fraction and stress. It is designed by dynamic topology optimization method after setting optimal parameters.2. The FEM of QK30 body of stainless steel light rail vehicles is created in HyperMesh software, and it is solved under compress combination loadstep by static reduced method based on sub-structure technology. Reduced matrix is output and the sub-structure is created. The optimization model of QK30 body is defined, which the design variable is element density, the objective function is the minimum of the volumn fraction, the constraint is stress. The model in optimal area is designed by topology optimization method after setting optimal parameters.The dynamic topology optimization design for ATP hanging beam of EMU bogie successfully achieve the purpose to keep away from interference area, which provide the foundation to further frequency response optimization and time domain response optimization in the paper; The application of topology optimization method including the sub-structure technology save so much radioss and optimization time, improve the optimization efficiency and expand the range of optimization object under condition of the limited resources, and there is most practical significance for the research about sub-structure technology.