L'archivage a long terme de la maquette numerique trois-dimensionnelle annotee.

摘要

The use of engineering drawings in the development of mechanical products, including the exchange of engineering data as well as for archiving, is common industry practice. Traditionally, paper has been the mean to deliver those needs. However, these practices have evolved in favour of computerized tools and methods for the creation, diffusion and preservation of data involved in the process of developing aeronautical products characterized by life cycles that can exceed 70 years. Therefore, it is necessary to redefine how to maintain this data in a context whereby engineering drawings are being replaced by the 3D annotated digital mock-up.;First, we review the requirements imposed by the aviation industry in the context of long-term archiving of 3D annotated digital mock-ups. We then consider alternative solutions. We begin by identifying the theoretical approach behind the choice of a conceptual model for digital long-term archiving. Then we evaluate, among the proposed alternatives, an archiving format that will guarantee the preservation of the integrity of the 3D annotated model (geometry, tolerances and other metadata) and its sustainability.;The evaluation of 3D PDF PRC as a potential archiving format is carried out on a sample of 185 3D CATIA V5 models (parts and assemblies) provided by industrial partners. This evaluation is guided by a set of criteria including the transfer of geometry, 3D annotations, views, captures and parts positioning in assembly.;The results indicate that maintaining the exact geometry is done successfully when transferring CATIA V5 models to 3D PDF PRC. Concerning the transfer of 3D annotations, we observed degradation associated with their display on the 3D model. This problem can, however, be solved by performing the conversion of the native model to STEP first, and then to 3D PDF PRC.;This thesis addresses the issue of long-term archiving of 3D annotated digital mock-ups, which includes geometric and dimensional tolerances, as well as other notes and specifications, in compliance with the requirements formulated by the aviation industry including regulatory and legal requirements.;In view of current tools, PDF 3D PRC is considered as a potential solution for long-term archiving of 3D annotated models for individual parts. However, this solution is currently not deemed adequate for archiving assemblies. The practice of 2D drawing will thus remain, in the short term, for assemblies.