The Lightweight Research Of Bogie Frame In High Speed Power Car Based On Structural Topology Optimization

In order to promote economical and social benefits of railway passenger transportation, improving speed of passenger trains was regarded as first method for a long time in the world. The bogie lightweight technology plays a important role on speed increasing of rolling stock, which is one of key technology of high-speed train.Firstly, the second development for element life and death function of ANSYS was done with structural optimization design theory and ANSYS Parametric Design Language (APDL) in this paper, which was used in topology optimization analysis for inner ribs of bogie frame. So that we can determines quantitatively the position of inner ribs. And then, on the basis of optimal topological structural, the dimension optimization for plate thickness of bogie frame was implemented with optimization function of ANSYS. As a result, the static strength and fatigue strength of frame can both meet requirement of standard. At the same time, its quality was also reduced. By the comparison of related parameters for the optimized frame and the original, it is shown that stress distribution of the whole optimized frame become more uniform. We achieved the goal of frame lightweight and equal strength design.The conclusion provides a scientific basis for inner ribs layout of frame and this method provides a profitable reference for lightweight design of other types of frame in this paper. On the other hand, structural topology optimization design was also discussed.In this paper, all of analysis operation and data optimization was completed with APDL. Its parametric function can not only modify easily model but also increase speed of analysis operation and post-processing with macro-program and reduce the disk space which was occupied by finite element model.