| As the market demand of China’s rail transportation equipment industry gradually develops in the direction of personalization and diversification,rail trains have formed a huge product spectrum.In order to adapt to the complex and changing market demand in the increasingly competitive environment of the industry,we must focus on improving the R&D efficiency of key components on rail trains.The traditional R&D mode of rail train key components has problems such as fuzzy collaboration in design and manufacturing,nonuniform data sources and frequent exchange and rework,which makes it difficult to significantly shorten the R&D cycle and seriously shackles the application process of digital technology.In addition,the reusability of the drawing data used for design and manufacturing is poor,which cannot provide reference for the subsequent overhaul links,leading to the inability of closed-loop control of the full-cycle links,which is affected by the serious lack of correlation of multi-dimensional links and low integration of multi-source heterogeneous data.To address the above problems,this thesis investigates the full-cycle multidimensional coupling transfer relationship of key components on rail trains and constructs the MBD modeling specification of key components of multi-model full-spectrum rail trains,with the main research contents as follows.(1)A full-cycle multidimensional MBD model framework for rail train critical components is established.The information characteristics of rail train critical components in horizontal full-cycle(design-manufacture-overhaul)and vertical multi-dimensional(multimodel-all-spectrum)are analyzed,and the specific requirements of MBD modeling specification for rail train critical components in full-cycle multi-dimensional perspective are given;then,based on the common information characteristics extraction and modeling specification requirements analysis,the macro framework of full-cycle multi-dimensional MBD model is established.(2)A full-cycle MBD modeling specification for critical rail train components is established.Based on the existing MBD standards,a full-cycle MBD modeling specification framework for critical rail train components is developed,and a multi-scale MBD data set specification is formed.Based on the definition of MBD design model and process model,the MBD process information model was established.By combining this model with the overhaul information model,a full-cycle information model of rail train key components is obtained,which completes the closed-loop control and integrated collaboration of rail train key components in the design-manufacture-overhaul link and provides technical guarantee for the uniqueness and reusability of the full-cycle data source.(3)A multi-dimensional ontology knowledge model is established.Based on the MBD modeling specification that runs through the whole life cycle of rail train key components,and taking into account the information characteristics of multi-model full-spectrum multidimension and its transmission coupling law,the research of full-cycle multi-dimensional information fusion of rail train key components is carried out by using ontology modeling method,and the retrieval and visualization of full-cycle multi-dimensional ontology knowledge model of multi-model full-spectrum rail train key components are realized.The 3D association model of full-cycle multidimensional information coupling of rail train key components is established on CATIA platform.This paper unifies the data sources of each link of design-manufacture-overhaul of rail train tube key components,which effectively improves the efficiency of collaborative information transfer and shortens the product development cycle.The established digital collaborative development modeling specification system can ensure the coordination and unification between the upstream and downstream of each system in the product development process,so that the digital development of the product can be carried out effectively,orderly and standardized. |
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