SimpackNews

SimpackNews
5. Jahrgang 1.Ausgabe
Events
Johannes Gerl
INTEC GmbH
SIMPACK User-Meeting
2000 in Konstanz
Survey
Sabine Engert
INTEC GmbH
Take part in our survey
and
win a Psion Palmtop!
Software
Dr. Trautenberg
INTEC GmbH
MotionView - Simpack
- Interface
Software
Dr. Stefan Dietz
INTEC GmbH
Fembs 6 and
Load-X-Port
SIMPACK in America and Japan
Intec and Altair signed a distribution agreement making Altair the exclusive distributor
for the entire familiy of SIMPACK products in the US, Canada and Japan. This results
in a further enhancement of the world-leading solver technology SIMPACK.
Generating a turn over of more
than sixty million dollars a year and
employing more than 550 people,
Altair Engineering, Inc. is among
the world‘s lea ding providers of
engineering con sulting services,
including pro duct development,
process and product information
management, virtual prototyping,
tes ting and training.
Within the framework of a very successful
initial co-operation, Altair
and Intec developed an interface
between the solver technology
SIMPACK and the mechanical system
simulation pre- and post-processor
for standardised auto motive
engi neering tasks.
This inter face was partially financed
by five leading car manufacturers.
As a logical consequence Intec
and Altair ex panded the existing
partnership by a distribution
agree ment signed by James Scapa,
President of Altair, and Alex Eich-
berger, Managing Director of Intec.
Altair is the exclusive dealer for
Dezember 2000
the whole range of the SIMPACK
pro duct family in North-America
and Japan.
Customers, in these countries,
will now be able to benefit from
direct support. This sub stantial
extension of the mar ket re sults in
a further growth of the SIMPACK
development which will benefit
all our customers.
A. Eichberger (Intec) and J. Scapa (Altair)

Events
Johannes Gerl
INTEC GmbH
SIMPACK User-Meeting 2000 in Konstanz
Am 4. und 5. April 2000 fand im Steigenberger-Inselhotel in Konstanz am Bodensee das 3. Simpack User-Meeting statt. INTEC brachte
die SIMPACK-Community auf den neuesten Stand der Informationen: Eben erschienene SIMPACK-Module, zukünftige Programmversionen
und die bevorstehende Umwandlung von INTEC zur Aktiengesellschaft waren die Highlights. Die SIMPACK-User gestalteten
mit neunzehn Vorträgen den Großteil der Veranstaltung. Am Ende herrschten bei den über achtzig Teilnehmern zwei Eindrücke vor:
die Freude an dem gelungenen User-Meeting und die Begeisterung über die Vorträge.
INTEC - Neue Produkte und neue
Märkte
Dr. Lutz Mauer eröffnete das SIM-
PACK User-Meeting 2000 mit der
Präsentation der Agenda und hieß
alle Teilnehmer herzlich willkommen.
Dr. Alex Eichberger präsentierte die
Entwicklung von SIMPACK seit dem
letzten User-Meeting im Herbst 1998.
Die letzten beiden Jahre sei es gelungen,
neben dem Ausbau von SIMPACK
Wheel/Rail, SIMPACK Automotive + in
der Automobilindustrie zu etablieren.
Die Zahl der Installationen von SIM-
PACK wächst immer noch um 50%
stärker als der Gesamtmarkt auf dem
CAE-Sektor. Dies ist umso erstaunlicher
als die Aktivitäten sich bis dato fast
ausschließlich auf Europa konzentrierten,
wo SIMPACK-User durch ein
internationales Support-Team in der
Firmenzentrale in Weßling unterstützt
werden.
Durch die Anfang 2000 begonnene
Kooperation mit dem amerikanischen
Softwarehaus ALTAIR steht SIMPACK
nunmehr auch der amerikanische
und japanische Markt offen. Um dem
Wachstum der Firma Rechnung zu tragen
und um für weitere Entwicklungssprünge
von SIMPACK die Grundlage
zu schaffen, wird INTEC sich im kommenden
Jahr in eine Aktiengesellschaft
umwandeln.
Vertriebs- und Marketingleiter Johannes
Gerl gab eine Übersicht von den
neuen Programmodulen, die zuletzt
für SIMPACK entwickelt wurden. Diese
sind das Interface zu I-deas (FE- und
CAD-Paket) und das Interface zu
AMESim und SIMPACK Optimisation.
Load-X-Port, eine neue Schnittstelle
zum Export von Lasten aus SIMPACK
nach FE-Programmen wurde vom
verantwortlichen Entwickler Dr. Stefan
Dietz vorgestellt.
Entwicklungsleiter Dr. Wolfgang Trautenberg
schließlich kündigte die neue
SIMPACK Zwischenversion 8.5 an und
gab einen Ausblick auf die neue Major
Release 9.0.
SIMPACK - Hardware-in-the-Loop
SIMPACK hat eine Funk tiona li tät, mit
der man beliebige Modelle in FORT-
RAN-Code exportieren kann. Hierdurch
zeigt SIMPACK optimale Voraussetzungen
für einen Code-Generator für
den Mech anikteil von Hardware-inthe-Loop-Simulationen.
Herr Neubeck
vom FKFS gab in seinem Vortrag einen
umfassenden Überblick der Potentiale,
welche in diesem Bereich in SIMPACK
stecken: beispielsweise die automatische
Code-Konvertierung in C und
der Anschluß von SIMPACK-Modellen
an den MATLAB Realtime Workshop,
welcher beim FKFS bereits mehrfach
in Projekten für die Industrie durchgeführt
wurde.
Partner-Software
Demnächst neu in SIMPACK verfügbar
ist das Swift-Tyre Model von TNO.
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Swift benutzt zur Abbildung der Reib-
eigenschaften denselben Ansatz wie
MF-Tyre, also die Magic Formula nach
Prof. Pajeka. Die höherfrequente Reifendynamik
wird allerdings durch ein
Ringmodell abgebildet, welches über
diskrete Federn und Dämpfer mit der
Nabe verbunden ist.
ALTAIR, neuer Distributionspartner
für SIMPACK in den USA und in Japan,
stellte das Interface MotionView
- Simpack vor, welches den ALTAIReigenen
Pre- und Post-Processor für
Au tomotive-Mehrkörpermodelle an
SIMPACK anbindet.
Kontakt, Kometen und Skispringer
Der späte Nachmittag des ersten Tages
brachte einen ebenso unterhaltsamen
wie seitens der verwendeten Simulationstechnologie
beeindruckenden
Ausklang. Dr. Hilchenbach vom Max-
Planck-Institut für Aero nomie zeigte
SIMPACK-Mo del le des Kometen-Landers
Rosetta, welcher in zwanzig Jahren
auf dem Kometen Wirtanen landen
soll. Herr Lehner von der TU-München
zeigte Bio-Mechanik-Modelle, welche
zur Ver besserung von Skistiefeln und
Skibindungen für konventionelle und
für Curving-Skier verwendet wurden.
Volker Quarz von der Technischen
Universität Dresden lieferte einen
Überblick über die Kontaktmodelle in
SIMPACK, eingesetzt beispielsweise bei
der Simulation einer keilge sicherten
Rohrladung bei Kurvenfahrt.
SIMPACK Wheel/Rail
Die Kundenvorträge zu SIMPACK
Wheel/Rail zeigten die gesamte Bandbreite
eines ausgereiften und leistungsstarken
Produkts, das die Marktführerschaft
beansprucht.
Christoph Weidemann von der Bochumer
Verein Verkehrstechnik GmbH ging
die Simulation gummigefederter Eisenbahnräder
an. Diese Simulation ordnet
sich in den Forschungsbereich ein, läßt
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sich aber dennoch ohne Neupro grammier
un gen mit dem serienmäßigen
Simpack Rad-Schiene-Kontaktmodell
durchführen.
Pier Wiersma von NS Technisch Onderzoek
zeigte Simulationen, welche
begleitend zu Messungen an einer
Weiche durchgeführt wurden und sich
als „sehr nützlich zum Verständnis der
Meßergebnisse“ erwiesen. Vor allem
die Planung weiterer Messungen ließ
sich durch den Einsatz der Simulation
effektiv gestalten.
Im Zentrum des Vortrages von Michael
Seibert von der Siemens Duewag Schienenfahrzeuge
GmbH stand ein Fahrwerk
nach dem Halbdrehgestellprinzip,
also ein Drehgestell, dessen zwei
Rahmen für bessere Bogengängigkeit
gelenkig miteinander verbunden sind.
Er verglich das Halbdrehgestellfahrwerk
mit einem konventionellen und
einem Ein zel rad-Doppelfahrwerk. Die
Simu lations ergebnisse stellten Verschleiß,
Stabilität und Fahrkomfort der
einzelnen Konzepte gegenüber.
Karl Tillmetz und Dr. Bernd Kessler von
Adtranz (CH) AG zogen schließlich
alle Register eines modernen Simulationstools
mit einem ausgereiften
Wheel/Rail-Plugin. Durch den Import
von FE-Modellen von Wagenkästen
in SIMPACK wurde bereits bei einer
Reihe von Fahrzeugen der Fahrkomfort
deutlich verbessert. Diese Simulationen
zusammen mit Know-How und
Erfahrung in der Meßtechnik sind der
entscheidende Schritt zum Digitalen
Proto typen im Schienenfahrzeugbau,
der ein enormes Potential im Bereich
Kostensenkung bietet.
Download der Vorträge vom SIMPACK User-Meeting 2000 :
http://www.simpack.de/html/infodesk/UM2000/user_meeting.html

SIMPACK Automotive +
SIMPACK Automotive + ist während der
letzten beiden Jahre mit inzwischen
über fünfzig Installationen zu einem
Standard-Werkzeug in der Automobilindustrie
geworden. Entsprechend
waren zum ersten Mal die Vorträge aus
dem Automobilbereich in der Überzahl
- viele davon mit Berichten über ausgesprochene
High-End-Anwendungen.
Den Auftakt machte Prof. Kovanda, von
der Czech Technical University Prag. Ein
konzeptioneller Vergleich zwischen
den Fahrwerken eines Porsche Carrera
und eines Honda Accord Coupé wurde
an der TU Prag im Rahmen einer Studienarbeit
durchgeführt, jeweils mit
Gesamtfahrzeugmodellen mit elastokinematischen
Achsfüh rungen.
Heinz Weinfurter vom Ingenieurbüro
Dr. Hirschberg, Steyr, simulierte mit
SIMPACK Automotive + Extremfahrmanöver
von Sattelzügen der Firma MAN
Nutzfahrzeuge. Die detaillierten Modelle
von Zugmaschine und Auf iegern,
unter anderem mit tor sions elastischem
Rahmen, brachten auch bei Fahrmanö-
vern nahe an der Kipp grenze eine bril-
liante Übereinstimmung von Versuch
und Simulation.
Bei der MAN Nutzfahrzeuge AG wird
SIMPACK Automotive + für zahlreiche
Komponenten bishin zu Gesamtfahrzeugsimulationen
mit elastischen, FEmodellierten
Rahmen und Achskomponenten
eingesetzt. Thomas Ille zeigte
Teilmodelle von Antriebssträngen,
Motoren mit Lagern, Aufhängungen
und dem neuen Produkt Trucknology
Generation bei Prüf stands ve rsuchen.
Imre Boros von der DaimlerChrysler
AG demonstrierte den Einsatz von
SIMPACK in der Nutzfahrzeugbranche
des Konzerns an Beispielen. Hier zeigte
er die Lösung spezieller Problemstellungen
wie Taumelschwingungen des
Motorblocks, des Getriebeblocks und
der Lenkungspendel mittels Simpack.
Weiter sprach er von der Einbindung
von SIMPACK in die Prozeßkette bei
der Fahrzeugent wicklung, wie z.B. bei
der Entwicklung von Fahr dynamikre ge-
lungs syste men (ESP), der Wendekreisbe-
rech nung und der Lastkollektivermitt-
lung für FE-Berech nungen.
Lauri Ohra-Aho zeigte die SIMPACK-Ak-
tivitäten bei der Ford AG. Angefangen
mit den ersten Lizenzen von SIMPACK
1997 wird SIMPACK Automotive + heute
für Gesamtfahrzeugsimulationen, zum
Teil mit elastischem Karosseriekörper,
und als Verbund des SIMPACK Solvers
mit ALTAIR’s Mo tionView zur Analyse
von Radaufhängungen eingesetzt.
Das nächste Usermeeting wird im No-
vember 2001 stattfinden. Wir würden
uns freuen, wenn Sie daran teilnehmen
würden.
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Dr. Lutz Mauer: Eröffnung
Dr. Alex Eichberger: Neue Märkte
Johannes Gerl: Neue Produkte
Dr. Stefan Dietz: Fembs 6
Dr. Wolfgang Trautenberg:
SIMPACK 8.5 und 9
Das Auditorium
Thomas Ille, MAN Nutzfahrzeuge
Dr. Bernd Kessler, ADtranz Schweiz
Imre Boros, DaimlerChrysler Nutzfahrzeuge
Pier Wiersma, NS Technisch Onderzoek

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Survey
Sabne Sabine Engert
INTEC GmbH
Create the Future of CAE
Win a Psion 5mx Pro with Leather Case
DLR, developer of the SIMPACK basic methods, is creating the future of computer aided engineering. Many new methods,
algorithms and software solutions will be developed during the coming years. With this survey we would like to have your
opinion about the future of our business. Return the questionnaire by 15th february 2001 and you could win a Psion S 5mx
pro. This Psion Palmtop has the power to communicate via e-mail, internet, fax or SMS with your colleages and friends, to
organize your business and private agenda, or to connect with your desktop PC.
How long have you already been working with simulation tools?
less than
a year
1 - 3
years
To what extent do you use the functionality of the following systems?
MBS FEA CAD
How satisfied are you with those tools?
MBS FEA CAD
4 - 5
years
Your Simulation Environment
Computer Aided
Control Engineering
(CACE)
Computer Aided
Control Engineering
(CACE)
more than
5 years
Hardware
in the Loop
(HIL)
Hardware
in the Loop
(HIL)
Non User
up to 25% of its capabilities
up to 50% of its capabilities
up to 75% of its capabilities
use its full capabilities
Going regularly over
the systems capabilities
very satisfied
satisfied
less than satisfied
not at all satisfied
don`t know
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As you know there can be specific problems with simulation packages. What is the major problem with the simulation
package that you currently use? (several answers possible)
It requires
too much
time
the functionality
is not
sufficient
it is too specialised
There is no
problem
Which kind of product integration (two in one) would you be interested in?
Often two different modelling tools are used. You may have to enter the same modelling data twice, once in each modelling
package. How much data has to be entered twice? (Please answer in %)
% MBS+CAD % FEA+CAD % MBS+CACE % MBS+FEA
The Future
Imagine your simulation tools in ten years.
Will it be necessary to know more or less engineering theory than today for using your tool?
I guess more I guess less I don`t know
Integrating Your Tools
other, it is __________________
___________________________
MBS+CAD FEA+CAD MBS+CACE MBS+FEA other, it is __________________
If you received 50 000 Euro to improve the facilities available at your work, would you invest them in ...
(Please fill in your order of preference 1 - 4: 1=being most important, 4=being less important)
a different
software
In ten years there will be ...
...one general CAEtool
that consists of
all the others
a develop ment
project to improve
your tool
...the same tools as
today, but with much
better interfaces
software
training for
yourself
...more specialised
tools with more sophisticated
interfaces
theoretical
training for
yourself
...don`t know

10
11
12
13
14
Concerning the functionality of a CAE-tool my simulation tool should ...
be easier to
handle
Concerning the handling of a CAE-tool I prefer to have...
‘one button’
solutions
If there were to be other products from the SIMPACK team, I would be interested in
Fluid Simulation (Hydraulics,
Pneumatics, etc.)
Hardware-in-the-loop
extension
dispose of
extended
functionality
as much control over the software’s
functionality as possible
Let’s talk about SIMPACK
contain more
powerful solver
technology
CACE Fatigue
Analysis
the SIMPACK-solver as a
plug-in for CAD systems
Extended FEA-connection
(Co-Simulation, non-linear FEA,
integrated FEA-tool etc.)
If we need further information concerning CAE or especially SIMPACK, could we call you by telephone?
name function
company e-mail-address
don`t know
Which area of SIMPACK should be concentrated on, in terms of its future development?
Usability Technology Libraries
Other, it is _______________________________
Copy and fax by 15th february 2001 to INTEC GmbH +49-8153-9288-11
don`t know other, it is
______________________
Graphical User
Interface
Yes, my telephone number is __________________________ No
other, it is
____________________
don`t know
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New Software
Dr. Wolfgang Trautenberg
INTEC GmbH
Interface between SIMPACK and MotionView
ALTAIR and INTEC have presented a Beta-version of the interface between the pre- and post-processor MotionView and the SIMPACK
solver. This project has had the support of Alfa Romeo, BMW, Ford, Porsche and Volkswagen. The current function ality of the interface
allows a MotionView model to be calculated using the SIMPACK time domain solver, as well as allowing plots and animations of the
SIMPACK produced results.
Project Partner
The development of the interface has
been backed by the Automotive Industry,
who have highlighted what they
would like featured in the inter face.
Current MotionView users of the preand
post-processor see the possibility
for their current simu lation capabilities
to be ex tended with the addition of the
fastest and most reliable MBS solver on
the market.
The development of the interface has
taken 3.5 man years. Funding has come
from Alfa Romeo, BMW, Ford, Porsche
and Volkswagen.
MotionView
MotionView is currently used al most
exclusively for building up auto motive
models, whether it be single as semblies
or complete vehicles. With the so-called
Wizards, the models can be built up
in the form of multilevel as semblies
from ready made com ponents such
as suspen sions, steering systems and
power trains. To build up a completely
new model however the model must
be in ASCII format. Models prepared
within MotionView by simulation engineers,
can than be easily mo dified
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by the relevant vehicle specialists,
within the MotionView en viron ment.
The vehicle specialists do not need to
have a complete under standing of the
pro gram, but only a general overview
of how it operates.
You can use the model browser, alongside
the 3D graphics, for the visualisation
of the model structure, which is not
too dissimilar to the file browser of an
operating system. As in SIMPACK, it is
possible within Mo tionView to display
graphically the results of a simulation
in the form of animations and plots. The
animation is based upon the ALTAIR
H3D file. This pure results file contains
the time history of the simulation and
the 3D description of the model. This
allows the results files to be given to
other users whilst keeping the exact
details of the model set-up secret. This
H3D file is a 3D animation file which is
so compact - you can send it or publish
it easily via internet.
Further details about the interface are
going to be discribed in one of the following
SimpackNews.

New Software
Dr. Stefan Dietz
INTEC GmbH
New Tools for MBS-FEA-Interfacing:
FEMBS 6 and Load-X-Port
An efficient and accurate implementation of fexible bodies is one of the major advantages of SIMPACK. With the new Version 6 of
FEMBS and the new interface Load-X-Port, it is now possible to import fexible structures even more conveniently into SIMPACK and
to export the loads, acting on a fexible body, from SIMPACK to FEA-codes. The easy-to-use interface of Load-X-Port provides all the
data necessary for the FEA tools to calculate defections and stresses. This can lead to enormous potential savings in terms of time
and money within the development process.
Flexible Bodies in SIMPACK Using
FEMBS 6
The SIMPACK Interface used to import
flexible bodies, FEMBS, is currently
available as Version 6 for the FEA codes
ABAQUS, ANSYS, I-deas, NASTRAN and
MARC. Here - in contrast to other MBS
tools - SIMPACK can take into consideration
the geometric stiffening effects,
al lowing for the increased bending
stiffness of the rotor blades while rotat-
ing. This method is as accurate as using
a FEA tool but the calculation requires
less computation time and much less
user effort, than if the fexible body was
subdivided into separate fexible bodies
and later merged in a multi-body
system software.
The capabilitiy of the new Version 6 of
FEMBS has now been expanded by a
new feature. In SIMPACK, fexible bodies
are con nected to the multi-body
system by force elements constraints
and a joint. Sometimes these interconnections
cause local deformations at
the attachment points of the structure.
Consider the de formations of a railway
car body which is connected, at distinct
points, to an electrical transformer.
To treat such local deformations, it is
either possible to use so-called static
modes or to use a large number of
normal modes. Generally, the normal
mode approach is less efficient due to
a large number of additional degrees of
freedom corresponding to the normal
modes. The static mode approach is
fre quently difficult to apply, because
it is sometimes impossible to define an
appropriate set of boundary con ditions
for the static mode cal cu lations. This
can be particularly problematic when
looking at foating vehicle com ponents
such as fexible car bodies. In contrast,
FEMBS now uses the frequency re-
sponse mode approach. This applies
to floating vehicle com ponents and
has be come the most appropriate
solution ap proach for fexible bodies
in SIMPACK. The deformed shape of
an elastic part, due to external forces
acting on the body, can now be taken
into con sideration much more easily.
An additional calculation step is all
that is required within FEMBS to yield
the results, which means that it is not
necessary to repeat the FE analysis. The
set of additional frequency re sponse
modes can represent elastic body de-
formation for all parameters (stiffness,
damping, etc.) of the interconnections.
With a single set of modes the user may
perform para meter variations, whilst
obtaining accurate elastic behaviour.
Therefore, the number of models
exchanged between FEA-codes and
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SIMPACK is decreased, as well as improving
the handling quality of the
whole design process.
Calculation of Loads on Flexible
Bodies in SIMPACK
Having imported a fexible structure to
SIMPACK, all the forces acting on the
body can be calculated in SIMPACK using
the time integration module.
As a first step, the user of FEMBS has to
select nodes on the FEA–model which
should be transformed to mar kers in
SIMPACK. All these markers are then
available to apply external forces in the
multi-body simulation, i.e. constraint
forces, spring and damper forces etc.
Load-X-Port
After the time integration has been
performed, the forces acting on the
fexible structure are available for any
attachment point and time step. However,
the external forces produced
by the springs, joints, etc. are not necessarily
in equilibrium, i.e. an overall
ac ce leration of the body would appear
in the FEA-code. Therefore Load-X-Port
automatically adds the movement
of the body fixed reference frame calculated
by SIMPACK to the load vector
which is exported. The FEA-code then
calculates and takes into account the
corresponding inertia forces for a
quasi-static overall motion.
Evaluating the result of the time integration,
the user can decide which time
steps should be written to the result file
by Load-X-Port. The files serve as the
input for the quasi-static time domain
calculations in the FEA- codes, giving
the stresses and de fections.
A selection tool helps to quickly define
either the number of time steps with a
certain increment or the time interval
in which to perform the calculations.
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The result file is stored as an ASCII
file. Currently the user has the choice
between the formats of ANSYS and
NASTRAN. Load-X-Port will be avail a ble
for Life time calculation tools in the
near future.
New BEAM Available Soon
For simple, beam-like sectioned structures
with constant cross sec tional are-
as, for instance stabiliser bars and shafts
of drive trains, the SIMPACK pre-processor
BEAM can provide the same input
for SIMPACK, as a FEA package creates
together with FEMBS. By 2001BEAM
will be able to consider three-dimensional
frameworks. A graphical user
interface directly integrated into SIM-
PACK will also be available.
Benefits
SIMPACK offers the user high-end simulation
technology for the con sideration
of fexible structures. All the additional
features make the handling of common
tasks by simu lation experts much
easier and allow a more integrated
design process.
These abilities are essential for an
accurate and efficient simulation of
fexible parts such as stabilisers, leaf
springs, sub frames, twist beam rear
axle suspension systems and car bodies
in automotive and railway design.

Staff
Dr. Alex Eichberger
INTEC GmbH
Neue Verantwortlichkeiten bei INTEC
Mit Beginn des Jahres 2000 wurden
die SIMPACK-Entwicklungsaufgaben
neu strukturiert. Der Schritt ist
im Erfolg der Software begründet,
in der ständig wachsenden Zahl
von Installationen und Entwicklungsprojekten.
Der SIMPACK-Entwicklungspart ner
DLR konzentriert sich künftig auf
den Bereich der MKS-Methoden,
also Algorithmen, Numerik, Solver
und CAE-Interfacing. Der Einsatz
von SIMPACK für DLR-eigene
Forschungspro jekte in den Berei-
chen Straßen- und Schienenfahr-
zeuge und Flugzeuge bleibt jedoch
erhalten und ist eine unserer anspruchsvollsten
Testplatt for men.
INTEC nimmt sich der eigent li -
chen Software-Entwicklung von
SIMPACK an. In diesem Zuge leitet
Dr. Wolfgang Trauten berg nun die
Entwicklungsabteilung bei INTEC
und Johannes Gerl den Bereich
Vertrieb und Marketing.
Dr. Wolfgang Trautenberg begann
seine mittlerweile zehnjährige Aktivität
im SIMPACK-Umfeld mit der
Entwicklung der CAD-Interfaces
ProSIM und CatSIM und war dann
für das SIMPACK-GUI zuständig.
Nach abgeschlossener Promotion
verbrachte er das letzte Jahr zum
Teil in den USA, um in Zusammenarbeit
mit ALTAIR als INTEC-seitiger
Projektleiter die MotionView-SIM-
PACK-Schnittstelle zu entwickeln
(siehe Artikel in dieser SIMPACK
News). In seinem neuen Job als
Director Product De ve lop ment
führt er nun die Ent wicklung von
SIMPACK und der SIMPACK-Inter-
faces in die Zukunft.
Johannes Gerl arbeitete von 1994
an zunächst ein Jahr beim DLR
und wirkte an der Entwicklung von
SIMPACK Wheel/Rail beim Benchmarking
der neuen Software mit.
Es folgten insgesamt fünf Jahre
bei INTEC. Die ersten zwei Jahre
als Projektingenieur, zunächst im
Bereich Wheel/Rail, dann auch
im Bereich Automotive + . Die folgenden
beiden Jahren bei INTEC
leitete er Engineering-Projekte
und übernahm Aufgaben aus dem
Vertrieb, auch in Zusammenarbeit
mit den SIMPACK-Partnern im Ausland.
Sein Engagement im SIMPACK
Marketing brachte die SIMPACK
News und den „Leo nardo da Vinci-
Stil“ der Corporate Identity von
SIMPACK hervor. Seine neue Stelle
als Director Sales and Marketing
umfaßt den nationalen und internationalen
Vertrieb von SIMPACK,
sowie das SIMPACK-Marketing.
Johannes Gerl und Dr. Wolfgang Trautenberg
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IdeSIM available now
The SIMPACK family of CAD inter-
faces has a new member, IdeSIM,
the interface between I-deas and
SIMPACK. IdeSIM is completely
integrated into the I-deas Graphic
User Interface (GUI) and enables the
user to create and export SIMPACK
models without having to leave the
I-deas environment. Therefore it is
possible to choose from a variety
of SIMPACK modelling elements
and automatically extract mass
properties, coor dinate systems and
geometry of an I-deas assembly.
With the exported IdeSIM models,
the full range of SIMPACK’s solver
power, interface technology and
post processing functionality is
available. IdeSIM ensures consistent
data storage in the CAD
model, which means that it is even
possible to open the exported
model within SIMPACK without
lo sing the dependencies defined
in IdeSIM. The integrated interface
ideally supports the concurrent
engineering approach in product
design, by enabling the design
and simulation engineers to easily
share their model data between
I-deas and SIMPACK. With the use
of IdeSIM, the time to ge nerate a
SIMPACK simulation model is drastically
reduced, when compared to
the conventional method of transferring
only the geometrical data
from a CAD to a MBS pack age.
Updates for Wheel/Rail
New plot features for the analysis of
the geometrical contact con ditions
are now available with SIMPACK
Wheel/Rail. The new win dow includes
a collection of the most important
and often used modelling
para meters and charts, for instance,
the location of the corresponding
contact points on the wheel and
rail profiles are shown to gether
with a description of typical contact
parameters.
With the release of SIMPACK 8,
Patch 6, the Wheel/Rail module
can now simulate completely
elastic wheelsets and wheels. The
shaft as well as the wheel disk can
be imported by FEMBS from the
FEA-tool.
Patch 6 for SIMPACK 8
The new program update includes
more than forty user requests, plus
a number of new features which
include new plots, screen shots and
movie generation as well as a new
air spring force element.
Collaboration with ERRI
DLR, the European Rail Research
Institute ERRI and INTEC have
signed an agreement to mu tually
market and maintain an extensive
library of freight car models to be
used with SIMPACK Wheel/Rail. The
library has been developed by DLR
and ERRI in close collaboration
with the UIC-members DB AG, NS
and SNCF. These libraries have been
validated extensively. The available
vehicles will be:
- the two axle freight train wagons
Hbbins, KLS442 and Lgjs578 and
Tdgs930
- the fat wagon RS675 with Y25
bogies
- the fat wagon RS680 with the
bogies BA931, RS BA88
- the fat wagon RS686 with BA
65 bogies
- the container wagon Sgns with
B626(Y25) bogies
- the container wagon Sggns694
with B626(Talbot) bogies
The models are organised as standard
substructures. A detailed description
will follow in the next
SIMPACK news.
Train Ensemble Three Wagon from the New ERRi Database

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Aerodynamics in Automotive +
SIMPACK Automotive + is now
available with elements which can
model aerodynamic for ces. Air re-
sistance is defined as three forces
(longitudinal, lateral, vertical) and
three torques (roll, pitch, yaw)
which act on a vehicle chassis.
The air resistance Force Elements
apply the resistance forces and
torques as functions of air resistance
coefficients. These coefficients
are defined by the Input Function
against the side-slip angle. Additionally
a simple longitudinal
force, air resistance model with a
constant air resistance coefficient
is offered.
The complete set of elements
needed to take into account air
resistance are found within a SIM-
PACK Substructure. This substructure
applies air resistance forces
and torques on the vehicle chassis
and provides the graphical representation
in terms of scaled arrows
with user defined scale factors.
The forces are split between the
front and rear axles so that they
replace the effects of air resistance
torques.
The aerodynamic forces have been
integrated in collaboration with
BMW Technik GmbH.
SIMPACK Engine
INTEC is working on the development
of a new SIMPACK Plug-In
for the simulation of engines and
engine components.
The Plug-In will have the following
features: multi-cylinder engine
models, a fex ible lump valve spring
model, taking into account the
contact of windings, a cam contact
model, a chain and belt model, different
engine bearing models and
pa ra me ter ised drive train models.
New BEAM in Development
The successor of the SIMPACK preprocessor
BEAM will be avail a ble in
spring 2001. Major enhancements
will be a new graphical user interface,
integrated in SIMPACK and
of special note the extension to
three dimensional frameworks. This
lifts BEAM to the level of a simple,
beam element based FEA tool.
Presently BEAM creates a SID-file
for the des cription of the fexible
body in SIMPACK, which includes
geo metrical non-linearity and
load stiffening effects. Possible ap-
plication examples include space
frames, stabiliser bars (modelled
as one body in SIMPACK) and as
mo delled previously shafts and
rotor blades.
ProSIM on ProUser2000
The well-known SIMPACK Pro/Engineer
interface ProSIM was presented
at this year’s Pro/Engi neer
Users Conference in Florida.
ProSIM provides the full SIMPACK
modelling power under the user
interface of Pro/Engineer (including
flexible bo dies) and is able
to export complete models to
SIMPACK, affi rming SIMPACK as a
high-end simulation tool.
With SIMPACK as the “missing link”,
the export of CAD data to CACE systems
such as MATRIXx SystemBuilt
and MATLAB/Simu link is possible,
guaranteeing a continuous and
integrated design process.
A similar interface is also available
for Catia and I-deas.
Co-operation with Politecnico
Since the beginning of July 2000,
INTEC has been collaborating,
in the field of railway system dynamics,
with the Italian Uni versity
Politecnico di Torino, Faculta di
Ingeneria from Prof. Antonio Gugliotta.
The first joint project will be
the international research project
Mechatronic Train.
Workshop: SIMPACK Real -time
To increase SIMPACK’s functionality
in the real-time simulation
domain, major enhancements of
the SIMPACK Symbolic Code are to
be brought about. A workshop on
this field will be arranged to learn
more about customers’ wishes and
demands. Please contact INTEC for
details.
Matlab/Simulink
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New University and Research Licences
Deutsches Zentrum für Luft- und Raumfahrt,
Institut für Bauweisen- und Konstruktionsforschung, Stuttgart (Germany)
Escuela Técnica Superior de Ingenieros Industriales, Madrid (Spain)
Fachhochschule Braunschweig/Wolfenbüttel, Fachbereich Maschinenbau (Germany)
Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik, Berlin (Germany)
Freie Universität Berlin, Universitätsklinikum Benjamin Franklin (Germany)
Johannes Kepler Universität Linz, Institut für Mechatronik (Austria)
Northern Jiaotong University, Beijing (China)
TU Braunschweig in Zusammenarbeit mit der DLR, Braunschweig (Germany)
Università degli Studi di Perugia (Italy)
University of Siegen, Siegen (Germany)
New Commercial Licences
ADtranz Schweiz, Winterthur (Switzerland)
Advantech Hungary LTD, Budapest (Hungary)
ALSTOM LHB GmbH, Salzgitter (Germany)
BMW AG, Sparte Motorrad, München (Germany)
Breda Costruzioni Ferroviarie S.p.A., Pistoia (Italy)
Consultens Informationstechnik GmbH, München (Germany)
DAF Trucks N.V., Eindhoven (Netherlands)
Japan Railway East Co., Tokyo (Japan)
Eurocopter Deutschland GmbH, Donauwörth und Ottobrunn (Germany)
Fairchild Dornier GmbH, Oberpfaffenhofen (Germany)
Logomotive GmbH, Nürnberg (Germany)
NABI Rt., Budapest (Hungary)
National Aero-Space Lab. Netherlands (NLR), Amsterdam (Netherlands)
Robert Bosch GmbH, Stuttgart (Germany)
Siemens Krauss-Maffei Lokomotiven GmbH, München (Germany)
SIMPACK at Conferences and Exhibitions
20. - 22.02.2001
23.02.2001
08. - 09.03.2001
22. - 28.03.2001
06. - 07.06.2001
19. - 22.06.2001
28. - 29.06.2001
4. Symposium Kraftfahrwesen und Verbrennungsmotoren, Stuttgart
VDI Kurs Fahrzeugdynamik, Stuttgart
Fahrwerk-Tech 2001, München
Cebit, Hannover
Automobile and Railway Vehicle Dynamics, Lyon
CAT Engineering, Stuttgart
VDI Tagung Nutzfahrzeuge, Neu-Ulm
Market Review
Market Review
Seven new Customers Using
SIMPACK Wheel/Rail
Another five companies have started
to use SIMPACK Wheel/Rail or even
changed from other commercial products
to SIMPACK, helping to extend
its market leadership in the railway
domain and increasing the number of
industrial installations to over sixty.
SIMPACK has become more and
more the Standard for Europe’s
Truck Manufacturers
With the decision of DAF, together
with MAN and DaimlerChrysler, the
third traditional European Truck Manufacturer
is now using SIMPACK Automotive
+ , along with the truck suppliers
Bosch, Trelleborg and Wabco.
SIMPACK on Air
After benchmarking thoroughly the
other available MBS software Eurocopter’s
company wide virtual
prototyping solution is SIMPACK - a
trend-setting decision from a company
whose products are probably
the most demanding of all in terms of
system dynamics.

SimpackNews
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