Publications 1999 - abstracts

Automated Coupling of MDI/ADAMS and MSC.CONSTRUCT for the Topology and Shape Optimization of Flexible Mechanical Systems (pdf-Datei 2,1MB)
Müller, O. (Universität Karlsruhe)
Häußler, P. (Universität Karlsruhe)
Lux, R. (Universität Karlsruhe)
Ilzhöfer, B. (Universität Karlsruhe)
Albers, A. (Universität Karlsruhe)
1999 International ADAMS User Conference/17.-19. November 1999/Berlin

Today's implementations of structural optimization lack the capability to consider load changes by the structural optimization itself. The loads and boundary conditions maintain the same during the entire optimization.
This article describes a new approach of an automated coupling of ADAMS and the MSC.CONSTRUCT structural optimization package. A batch-oriented closed-loop scheme was set up which allows ADAMS system-simulation with the body-shapes determined by the optimization and loads export during every iteration of the optimization procedure. After geometry modifications by MSC.CONSTRUCT the new body shape is imported into the ADAMS model for a new system simulation.
This approach enables the automated determination of complex loading-conditions for bodies in mechanical systems and the use of dynamically updated, i.e. iteration-dependent boundary-conditions for the structural optimization. When the dynamic analysis of ADAMS is used, even complex loads due to rotation and acceleration which depend on the mass distribution can be considered within the optimization.
This new and batch-oriented process is explained in this article and first optimization results will be presented. The results encourage further developments and offer major new opportunities for both the users of MBS as well as the optimization community.

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Optimization of Car Components using MSC.Construct (zip-Datei 2MB)

Dirschmid, F. (IABG)
MSC Worldwide Automotive Conference 1999/20.-22. September 1999/München

New CAE tools are necessary to fulfil the increasing demands for new car components. Typical demands are lightweightness, costs and developing time. Efficient tools and methods have to be used in the very early stage of development to achieve these goals. As soon as the design space, the boundary conditions and the loads are fixed, the topology optimization is an appropriate method to define a first design of the component. The topology optimization is a method that change the density and stiffness distributions in an iterative process to achieve a homogeneous stress distribution. This design proposal must be transferred in a real component by taking into account manufacturing and design points of view. The industrial application of this optimization method using MSC/CONSTRUCT is demonstrated in this paper for different car components.

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Automatic Shape Optimisation of Elastomeric Products (pdf-Datei 120KB)

Friedrich, M. (Freudenberg)
Baltes, J.
Schütz, M.
Gärtner, H.
MSC Worldwide Automotive Conference 1999/20.-22. September 1999/München

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Integrierte Topologie- und Gestaltoptimierung in der virtuellen Produktentstehung - eine Gemeinschaftsinitiative der Anwender und Methodenentwickler  (pdf-Datei 648KB)

Sauter Jürgen (FE-DESIGN GmbH)
Deutsche MSC Anwenderkonferenz, 21.-22. Juni 1999, Weimar (Germany)

Die virtuelle Produktentstehung ist Thema eines BMBF Leitprojektes. In diesem großen Rahmen ist die "Integration der Toplogie- und Gestaltoptimierung in den Konstruktionsprozeß" einer von 14 thematischen Schwerpunkten. FE-DESIGN koordiniert dieses Schwerpunktthema. Hierzu haben sich CAD/CAE-Anwender, MSC/CONSTRUCT Kunden, Fraunhofer- und Hochschulinstitute sowie CAD/CAE-Softwarefirmen zusammengefunden.
Im Vortrag werden zunächst die Partner und Branchen vorgestellt, die sich aktiv an der Integration der Topologie- und Gestaltoptimierung beteiligen. Die derzeit vorliegenden Konzepte und Planungen für den Projektverlauf werden erörtert. Neben den bisher identifizierten Kundenanforderungen der Konsortiumsmitglieder werden die ersten Ergebnisse präsentiert. Abschließend wird die Integrierte Topologie- und Gestaltoptimierung im Gesamtzusammenhang betrachtet. Hierbei werden Schlagworte wie DMU, PDM, Rapid-Prototyping, Virtual Reality, verteiltes Arbeiten und Software on Demand in Zusammenhang gestellt.
Ein Ziel des Vortrages ist es, entsprechend dem Wunsch des Bundesforschungsministeriums, in einer frühen Projekt-Phase, möglichst viele potentiellen Anwender (auch Nicht-Konsortiumsmitglieder) in den Diskussions- und Meinungsbildungsprozeß mit einzubeziehen. Zum anderen wird am Beispiel von MSC/CONSTRUCT gezeigt, wie die heutige Softwareentwicklung von Kunden mitgestaltet wird und wie groß die Einflußmöglichkeit der Anwender ist.

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Optimization of Aero-Structures using MSC/CONSTRUCT (pdf 5,5 MB)

Himmler Gerald (MSC)
Kalmutzke Annett (MSC)
Sippel Hans (MSC)
Huber Walter (MTU)
MSC World Aerospace Conference, 07.-10. Juni 1999, Long Beach (California)/USA

Aircraft and jet engine development requires being economical and reliable. A lot of efforts are taken to reduce the Direct Operating Costs (DOC) and to increase the payload of the aircraft. Therefore it is worth to lower the weight even on small parts. The next step is to reduce the time to market. New procedures like the Simultaneous Engineering come up where the analyst is already integrated into the concept phase of the product development process. Efficient methods of working require powerful optimization algorithms to be provided in addition to the discrete methods (FEM/BEM) proved to support the engineer in the draft and design phase.

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Topology Optimization of Large Real World Structures (pdf-file 572KB)

Müller O. (Universität Karlsruhe)
Albers A. (Universität Karlsruhe)
Sauter J. (FE-DESIGN GmbH)
Allinger P. (FE-DESIGN GmbH)
NAFEMS World Congress 1999, 26.-28. April 1999, Newport/Rhode Island (USA)

The paper first introduces the understanding of the different structural optimization types and positions their usage in the product development process.
After that, the software and hardware opportunities given through High Performance Computing (HPC) are explained shortly. The following section shows how performance and efficiency improvements of the topology optimization process were achieved by using HPC techniques. This work was conducted within the HIPOP (HIgh Performance OPtimization) project.
Finally topology and shape optimizations of real world examples show the successful implementation and their benefits.

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Last update: 2005-03-24