| As a typical complex high-tech equipment,bogie system is a large-scale core component of rail transit locomotives,with a large number of parts,and the special operation mode also determines the specific assembly sequence of bogies.It is of great significance to establish a CRH5 power bogie virtual assembly system in order to enable technicians engaged in rail vehicle industry to learn the composition,assembly and process requirements of high-speed rail trains.The structure,function and related technical parameters of the main parts of the CRH5 power bogie are analyzed first,the modules are divided according to the main functions of the parts,and the "bottom-up" method is used to model and cooperate.With regard to the assembly sequence planning of CRH5 power bogies,an improved ant colony algorithm is used to plan the assembly sequence of main parts of CRH5 power.The example of pull-down rod assembly sequence proves that the improved ant colony algorithm meets the evaluation index of assembly sequence,and can realize the overall optimization of bogie assembly sequence planning.finally,the virtual assembly system software with the functions of UI operation interface,assembly angle switching,human-computer interaction and collision detection is realized by Unity 3dsoftware,and it is published on the Windows platform.CRH5 power bogie virtual assembly system can help users to understand and learn the assemblability between bogie parts and assembly accuracy and assembly quality in the assembly process,and the system not only supports the dynamic simulation of assembly process oriented to assembly site,but also can effectively reduce the number of physical assembly in product development process and improve the one-time success rate of product assembly. |
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