Search for dissertations about: "computer-aided work"

Showing result 21 - 25 of 151 swedish dissertations containing the words computer-aided work.

2. 21. Smoothing and adaptive remeshing schemes for graded element

   Author : Seokjeong Hyun; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

   Abstract : The objective of the present work is to develop mesh smoothing and adaptive remeshing schemes to improve the Finite Element Analysis. Smoothing and adaptive remeshing techniques are studied for graded element. Different smoothing techniques are implemented and shown. READ MORE

4. 22. Quasi-analytical Modelling and Optimisation Techniques for Transport Aircraft Design

   Author : Askin T. Isikveren; KTH; []
   Keywords : aircraft; conceptual; design; specifications; atmosphere; geometry; weight; aerodyanmics; propulsion; operational performance; stability and control; constrained multi-objective optimisation; computer aided design; regional; business; high-transonic; ;

   Abstract : The research work presented here focuses on the subject oftransport aircraft design at the pre-design or conceptuallevel. The primary topics addressed are: (1) generation of avast array of new quasi-analytical expressions to permit aconceptual treatment of commercial and business transportaircraft with adequate sensitivity for more advanced tradestudies; (2) review and adoption of a method to predictstability and control characteristics (using the Mitchellmethod); (3) a study of the relative merits between variousmethods in facilitating an expedient and robust constrainedmulti-objective optimisation result within the context oftraditional conceptual design problems (Genetic Algorithms andNelder-Mead Simplex search); (4) creation of a software packageas a new and unique conceptual tool that permits the generationof design proposals in an accurate yet expeditious manner; and,(5) practical demonstration of the new conceptual designsoftware package by undertaking some actual aircraft designproposals. READ MORE

5. 23. Knowledge retention and reuse : supporting engineering decisions in simulation-driven product development

   Author : Michael Lundin; Martin Helgoson; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

   Abstract : Information exchange is becoming more and more important as modern manufacturers increasingly rely on integrated product development. Research shows that designers may not be aware of existing information or be willing to disrupt their work to search for the relevant information. READ MORE

6. 24. A modelling and simulation approach for linking design activities to business decisions

   Author : Magnus Löfstrand; Magnus Lundbäck; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

   Abstract : The business environment of the manufacturing industry is changing from a hardware-based product focus to a process and function focus. A current industrial interest is the development and sale of functions. This function could be realised as a product based on hardware, software and services, and may be sold as a function rather than as hardware. READ MORE

7. 25. Computational modeling of hot rolling

   Author : Jonas Edberg; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion; Material Mechanics; Materialmekanik;

   Abstract : This thesis consists of six papers on finite element simulations of the hot rolling of plates. Different friction and material models have been evaluated. The work includes both numerical simulation and experimental verification. READ MORE