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11	Detection and treatment of inconsistent or locally over-constrained configurations during the manipulation of 3D geometric models made of free-form surfaces / Détection et traitement de la configuration de sur-contraintes discontinues ou locale lors de la manipulation de modèle 3D géométrique réalisé par de surface à gauche Hu, Hao 23 January 2018 (has links) Trois modules seront développés: Le module de détection a produit une analyse des problématiques figurations con, à savoir un ensemble de domaines où soit quelques nouveaux DDL ou des changements locaux dans les contraintes sont obligatoires. Le module de traitement permettra à la défi nition des mécanismes pour aider la décision sur modi cations. Le module de prédiction dire le degré de déformation en pré-analyser les caractéristiques des configurations de NURBS. / Three modules will be developed: The detection module has produced an analysis of problematic con figurations, i.e. a set of areas where either some new DOFs or some local changes in the constraints are mandatory. The treatment module will enable the defi nition of mechanisms to help the decision on modi cations. The prediction module will tell the degree of deformation by pre-analyzing the features of NURBS configurations. Décomposition structurelle Analyse numérique Aide à la décision Intention de conception Free-Form surface deformation Redundant and conflicting constraints Structural decomposition Numerical analysis Decision support Design intent
12	Hybrid State-Transactional Database for Product Lifecycle Management Features in Multi-Engineer Synchronous Heterogeneous Computer-Aided Design Shumway, Devin James 01 April 2017 (has links) There are many different programs that can perform Computer Aided Design (CAD). In order for these programs to share data, file translations need to occur. These translations have typically been done by IGES and STEP files. With the work done at the BYU CAD Lab to create a multi-engineer synchronous heterogeneous CAD environment, these translation processes have become synchronous by using a server and a database to manage the data. However, this system stores part data in a database. The data in the database cannot be used in traditional Product Lifecycle Management systems. In order to remedy this, a new database was developed that enables every edit made in a CAD part across multiple CAD systems to be stored as well as worked on simultaneously. This allows users to access every action performed in a part. Branching was introduced to the database which allows users to work on multiple configurations of a part simultaneously and reduces file save sizes for different configurations by 98.6% compared to those created by traditional CAD systems. Interoperability Hybrid State Transactional Database Database Revision History Configuration Management Feature Level History CAD Translation Heterogeneous CAD CAD Features Neutral Format Design History Multi-User CAD Collaboration Neutral Parametric Canonical Form Design Intent Mechanical Engineering
13	Parametric CAD Modeling to aid Simulation-Driven Design : An evaluation and improvement of methods used at Scania Grandicki, Andreas, Lokgård, Mattias January 2017 (has links) This report documents a thesis conducted at Scania CV AB in Södertälje, Sweden. The main purpose of the thesis has been to examine and improve upon current practices of parametric CAD-modeling at Scania, with the ultimate goal of increased design automation and simulation-driven design. The thesis was initiated with a literature study, mainly covering the fields of parametric CAD-modeling, design automation and knowledge-based engineering. Furthermore, a questionnaire and multiple interviews were conducted to assess the awareness and mind-set of the employees. Finally, a case-study was carried out to follow current methodologies, and address any deficiencies found. Some of the most important findings were that while parametric modeling has considerable potential in enabling design automation, it is crucial, and most beneficial in terms of automation efficiency, to start with the fundamentals, namely achieving a uniform modeling practice. With these findings, a new proposed methodology has been introduced, as well as a recommended plan for a widespread implementation of parametric modeling at Scania. Such implementation would allow for shorter lead-times, faster adaptation to changing conditions, and reduced development expenditures. CAD CAE parameter parametric simulation MDO DOE simulation-driven design KBE knowledge-based knowledge-based engineering knowledgeware kwa kwe engineering mechanical scania methodology method evaluation model modeling modelling parametrization CATIA vba automation da pdm plm knowledge design intent exploration optimization flexible robust morphological topological Mechanical Engineering Maskinteknik

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Hybrid State-Transactional Database for Product Lifecycle Management Features in Multi-Engineer Synchronous Heterogeneous Computer-Aided Design

Parametric CAD Modeling to aid Simulation-Driven Design : An evaluation and improvement of methods used at Scania