DFMA-oriented BIM parametric design of a metro component
[Objective]Metro parking lots are important transit hubs for urban rail transit systems.The metro parking lot construction process involves components with engineering characteristics such as multiple specialization fields,large volumes,and complex forms.Building information modeling(BIM)technology plays a significant role in the project construction process with the advantages of informatization,parametrization,and visualization.Traditional modeling methods have difficulties in BIM model creation,repetitive work,and complex component splicing.This method leads to low modeling efficiency,directly affecting the construction application and promotion of BIM technology in metro parking lot projects.[Methods]This study introduces the product design concept of manufacturing-oriented fabrication and assembly(DFMA).It studies and designs a rapid modeling method for subway parking lot components for DFMA.By combining and analyzing numerous subway parking lot component design drawings,we analyze the component types,composition rules,data architecture,and other data in the drawings.In terms of manufacturing and assembly,we extract the verified design data and form the component design rules.To realize the component modeling method of DFMA,combined with BIM and parametric design,the design standard is realized by integrating it into BIM software and determined from the BIM software platform Revit secondary development tool software to realize rapid modeling.Based on DFMA and the parametric standard components created by the tool software,a cloud-based component library is developed synchronously to facilitate the storage and call of components.This paper studies the module library system architecture and data flow and analyzes the entire life cycle optimization design process based on the cloud-based module library.Finally,the structure of a metro parking lot project in the Changsha area is tested and compared.[Results]The results show that the DFMA-based product design method improved the modeling speed over the traditional method.The modeling speed is increased by approximately 60%on average,and mold loss during component production is reduced by approximately 20%.The created model is highly accurate and can be used to process and manufacture prefabricated components in a factory.Furthermore,the degree of model standardization is greatly improved after preliminary sorting and analysis to formulate the design rules of the components.[Conclusions]This study verifies the feasibility and practicality of the design method using actual engineering cases.The product design concept of DFMA is introduced to associate the design and production of the components.According to the BIM software Revit,the parametric design of the components is realized,and the application of DFMA is associated with manufacturing and installing subway parking lot components,making the components easy to produce and install.In addition,the design method accelerates the development of BIM technology in metro parking lots and strengthens digital collaboration in design and production.This helps to promote the digital design and construction of metro parking lots.
metro car parkDFMABIMstandardizationparametrization
NETL
NSTL
万方数据
