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Fundamentals of a Methodology for Predictive Design Analysis

Eriksson, Martin LU (2015)
Abstract (Swedish)
Popular Abstract in Swedish

För datorbaserade konstruktionsanalyser används traditionella CAE-verktyg såsom finita elementmetoden (FEM) inom strukturanalys, datorbaserad strömningsanalys och stelkroppsdynamik. Behovet av predikteringar i produktutveckling och konstruktion utgår ifrån det faktum att man i början av utvecklingsprocessen har liten eller ingen kunskap om den blivande produktens egenskaper och speciellt inte om de förutsättningar som konstruktionsanalyserna ska baseras på. Allteftersom produkten utvecklas ökar kunskapen om produkten och om de förutsättningarna som analyserna baseras på och därmed också gjorda predikteringar. Avhandlingen fokuserar på en operationell integration mellan datorbaserad... (More)
Popular Abstract in Swedish

För datorbaserade konstruktionsanalyser används traditionella CAE-verktyg såsom finita elementmetoden (FEM) inom strukturanalys, datorbaserad strömningsanalys och stelkroppsdynamik. Behovet av predikteringar i produktutveckling och konstruktion utgår ifrån det faktum att man i början av utvecklingsprocessen har liten eller ingen kunskap om den blivande produktens egenskaper och speciellt inte om de förutsättningar som konstruktionsanalyserna ska baseras på. Allteftersom produkten utvecklas ökar kunskapen om produkten och om de förutsättningarna som analyserna baseras på och därmed också gjorda predikteringar. Avhandlingen fokuserar på en operationell integration mellan datorbaserad konstruktionsanalys och konstruktion för att öka tillförlitligheten i predikteringar av produkter; här begränsade till sådana som baseras på mekaniska verkningssätt.

Avhandlingen presenterar en metodik för prediktiv konstruktionsanalys (PDA – predictive design analysis) som baseras på en processmodell för konstruktionsanalys, (GDA – generic design analysis) innehållande tre faser; planering, utförande och rapportering, som lämpar sig väl för integration med olika konstruktionsprocessmodeller i industrin och akademin genom sin generiska karaktär.

I planeringen, utförandet och rapporteringen av konstruktionsanalysuppgifter måste man i industriella tillämpningar, nästan undantagslöst, också beakta ett antal faktorer som påverkar analysens utförande. PDA-metodiken beaktar vikten av att identifiera och agera utifrån sådana faktorer, under beaktande av de osäkerhets- och felkällor som är kopplade till dessa, då dessa faktorer bidrar till ökad eller minskad tillförlitlighet i gjorda predikteringar. För att inkludera dessa faktorer och tillhörande osäkerheter och felkällor har ett antal aktiviteter benämnda CAA (för confidence appraisal activities), utvecklats och inkluderats i PDA-metodiken. (Less)
Abstract
The rapid development of computer-based design analysis tools and methods such as the finite element method (FEM) within computational structural mechanics (CSM), computational fluid dynamics (CFD), and multi-body systems (MBS) during recent decades has fundamentally changed the way in which products are designed and developed. Among the many advantages observed in industrial practice, one can mention improved understanding of product properties and behavior, the possibility to optimize critical design parameters and to optimize parts as well as the entire product at a system level, the possibility to explore a design space during the synthesis activity, and a decrease of the need for physical testing and thus of the number of physical... (More)
The rapid development of computer-based design analysis tools and methods such as the finite element method (FEM) within computational structural mechanics (CSM), computational fluid dynamics (CFD), and multi-body systems (MBS) during recent decades has fundamentally changed the way in which products are designed and developed. Among the many advantages observed in industrial practice, one can mention improved understanding of product properties and behavior, the possibility to optimize critical design parameters and to optimize parts as well as the entire product at a system level, the possibility to explore a design space during the synthesis activity, and a decrease of the need for physical testing and thus of the number of physical prototypes needed. However, all of these opportunities to improve the performance and durability of the product-to-be come with challenges. In order to utilize these tools as efficiently and effectively as possible it is necessary to facilitate their integration into the engineering design process, and in product development and product innovation as a whole. Where computer-based design analysis replaces more traditional evaluation, validation and prediction methods, there is also a demand for greater confidence in the design analysis process and in the results obtained.

The objective set out for the research project presented in this thesis is to outline the fundamentals of a methodology for predictive design analysis (PDA), a computer based design analysis methodology allowing for increased confidence in the predictions resulting from the design analysis activities regarding the critical design parameters and their influence on the behavior of the product-to-be (artifact) throughout the entire design and development of the artifact. The methodology is articulated around the generic design analysis (GDA) process model and how the activities within the phases of this process are influenced by factors emanating from the environment in which the design analysis task is originated and executed. Furthermore, a number of confidence appraisal activities (CAAs) are established to ascertain the confidence in the predictions made for the design analysis task during the analysis process. These activities provide for an increase in confidence in the design analysis process as well as in the results obtained as input to the subsequent engineering activities within the development project. The fundamentals in terms of constituent parts of a methodology for PDA, introduced in this thesis, are developed at a level of concretization that makes them directly applicable in an industrial setting. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Univ.-Prof. Dr.-Ing. habil. Zehn, Manfred, Technische Universität Berlin, Germany
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Predictive design analysis, Generic design analysis process model, Confidence appraisal activities, Computer-based design analysis, Engineering design, Integration
pages
83 pages
publisher
Lund University
defense location
Stora Hörsalen, Ingvar Kamprad Designcentrum, Sölvegatan 26, Lund University, Faculty of Engineering, LTH.
defense date
2015-12-11 09:15
ISBN
978-91-7623-522-5
language
English
LU publication?
yes
id
54f6ec15-fefc-466f-84dc-2b91703eb209 (old id 8170784)
date added to LUP
2015-11-17 12:54:14
date last changed
2016-09-19 08:45:08
@misc{54f6ec15-fefc-466f-84dc-2b91703eb209,
  abstract     = {The rapid development of computer-based design analysis tools and methods such as the finite element method (FEM) within computational structural mechanics (CSM), computational fluid dynamics (CFD), and multi-body systems (MBS) during recent decades has fundamentally changed the way in which products are designed and developed. Among the many advantages observed in industrial practice, one can mention improved understanding of product properties and behavior, the possibility to optimize critical design parameters and to optimize parts as well as the entire product at a system level, the possibility to explore a design space during the synthesis activity, and a decrease of the need for physical testing and thus of the number of physical prototypes needed. However, all of these opportunities to improve the performance and durability of the product-to-be come with challenges. In order to utilize these tools as efficiently and effectively as possible it is necessary to facilitate their integration into the engineering design process, and in product development and product innovation as a whole. Where computer-based design analysis replaces more traditional evaluation, validation and prediction methods, there is also a demand for greater confidence in the design analysis process and in the results obtained.<br/><br>
The objective set out for the research project presented in this thesis is to outline the fundamentals of a methodology for predictive design analysis (PDA), a computer based design analysis methodology allowing for increased confidence in the predictions resulting from the design analysis activities regarding the critical design parameters and their influence on the behavior of the product-to-be (artifact) throughout the entire design and development of the artifact. The methodology is articulated around the generic design analysis (GDA) process model and how the activities within the phases of this process are influenced by factors emanating from the environment in which the design analysis task is originated and executed. Furthermore, a number of confidence appraisal activities (CAAs) are established to ascertain the confidence in the predictions made for the design analysis task during the analysis process. These activities provide for an increase in confidence in the design analysis process as well as in the results obtained as input to the subsequent engineering activities within the development project. The fundamentals in terms of constituent parts of a methodology for PDA, introduced in this thesis, are developed at a level of concretization that makes them directly applicable in an industrial setting.},
  author       = {Eriksson, Martin},
  isbn         = {978-91-7623-522-5},
  keyword      = {Predictive design analysis,Generic design analysis process model,Confidence appraisal activities,Computer-based design analysis,Engineering design,Integration},
  language     = {eng},
  pages        = {83},
  publisher    = {ARRAY(0x8fe04c8)},
  title        = {Fundamentals of a Methodology for Predictive Design Analysis},
  year         = {2015},
}