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Page 02 SIMPACK – What is SIMPACK?

04 SIMPACK Kinematics and Dynamics05 SIMPACK Pre-Processing06 SIMPACK Solver07 SIMPACK Post-Processing

08 SIMPACK Modules: applications and functionalities

09 SIMPACK Interfaces

10 INTEC GmbH11 Consulting and Engineering12 Training

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Content

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What is SIMPACK?

SIMPACK's fully integrated functionality forthe creation and export of models in FORTRANor C code enables a high connectivity to othersimulation tools. Additionally, together withthe respective specialised modelling compo-nents, the exported code allows SIMPACKmodels to run on many HIL platforms.

SIMPACK´s main areas of application are– Automotive (manufacturers and

component suppliers)– Railway (manufacturers, suppliers,

permanent way and operators)– Aerospace– General mechanical engineering– Engine design

SIMPACK is faster than its closest rival and utilises the latest mathematical techniques toprovide the highest degree of accuracy andreliability whilst still retaining its user-friendlyqualities.

These qualities have helped in gaining a large customer base including BMW,DaimlerChrysler, Bombardier and Siemens,who have all been working with SIMPACK for a number of years.

Courtesy of BombardierTransportation (Switzerland) AG –Intercity Trains

SIMPACK is a multi-body simulation softwaretool used to simulate mechanical systems. TheSIMPACK software is able to analyse vibra-tional behaviour, calculate forces and accelera-tions and describe and predict the motion ofany complex multi-body system.

The basic concept of SIMPACK is to create theequations of motion for mechanical andmechatronic systems simply by building up aCAD style model (including joints, force ele-ments, etc.) and then applying various calcu-lation techniques, such as a time integration, to obtain a solution for the systems dynamicbehaviour.

SIMPACK has been specifically developed tobe able to simulate virtually any mechanicaland mechatronic systems. From simple sys-tems with few degrees of freedom to entiretrain configurations, SIMPACK may beemployed at any stage of the design, develop-ment and optimisation process.

SIMPACK is a multi-body system software used to simu-late mechanical and mechatronicsystems.

Courtesy of DaimlerChrysler AG

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SIMPACK Kinematics and Dynamics The Pre Processing – Model Set-up

SIMPACK Kinematics and Dynamics is thebasic foundation of SIMPACK, with the heartof the software being SIMPACK’s outstandingsolver. All other modules and interfaces can beadded on to SIMPACK Kinematics andDynamics.

The General Features of SIMPACK Kinematics and Dynamics – Basic module of SIMPACK– Visual 3D model set-up– SIMPACK time domain solver– Eigenmode Analysis– Quasi Static Solver– Animation and plot tools– Extensive libraries for joints, springs,

dampers, friction, etc.– Integrated data management

features

The model set-up is an easy starting point forthose new to SIMPACK and, at the same time,offers complete control to advanced users.

Extensive modelling libraries are available,supporting the fast and efficient creation of amodel. Any type of joint, marker or force ele-ment (standard or user-defined), can be easilyincorporated within the model. Use of themouse enables the user to work interactivelywith the 3D representation. This not onlysaves time in setting up and modifying modelsbut also reduces modelling errors.

The 3D components may, as well as com-pletely set up within SIMPACK, be created within a CAD package and then imported intoSIMPACK.

Any multi-body model, once created withinSIMPACK, can be exported to external envi-ronments using the add-on module CODEEXPORT. This makes SIMPACK ideal for de-signing actively controlled systems and for HILand real-time applications.

SIMPACK Kinematics and Dynamics comprisesthe functionalities of Model Set-up, Solver andAnimation/Plots.

Once a model has been created within theSIMPACK model set-up, the solver can then beused to carry out different analyses, the resultsof which can be animated and plotted.

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SIMPACK allows a fast and efficient model set-up, helpingsafeguard against modellingerrors.

SIMPACK Kinematics and Dynamics is the basic moduleand includes the heart of SIMPACK – the outstanding solver.

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The Solver Post-Processing: Animation/Plots

Once a multi-body model has been set-up, the solver automatically creates the equationsof motion.

Unique algorithms are used by SIMPACKin order to generate the equations of motion.Within SIMPACK the required calculationeffort is proportional to the degrees of free-dom, whereas in other software this is a quad-ratic or even cubic relationship.

This and the high performance integrationmethods enable SIMPACK to minimise calcula-tion times, whilst also being reliable and stable.This has been demonstrated in countless bench-marks and tests.

Additionally SIMPACK gives access to a largenumber of parameters allowing experiencedusers to tune the solver for complex systems.

The 3D model may be easily animated within SIMPACK by using the results of aneigen-value analysis or an integration run.Specific aspects of the animation may be readily investigated using fixed and movedcameras. Furthermore SIMPACK can generatefilms of the animations, which are oftennecessary for presentations.

In addition to using animations for investiga-ting dynamic or kinematic behaviour, a usermay also plot or export all correspondingnumerical data (e.g. ascii to excel).

Whether working within the time domainor frequency domain, SIMPACK's plot tem-plates, along with the curve import and over-lay capability, enable fast and comprehensivedata comparisons.

Plot data may be further analysed byusing SIMPACK's extensive library of filtersand curve superposition features.

Re-running integrations are not necessaryin SIMPACK when adding additional sensorsto a model.

Even challenging contact prob-lems showing strong non-line-arity, e.g. wheels losing and regaining contact, can be easily solved by the SIMPACK Solver.

Apart from the time integration, the SIMPACKsolver also comprises of calculation methodsfor static equilibria, used to automaticallydetermine pre-load forces for a given modelstate. The standard solver can also be used toperform an eigen-value analysis. Additionalfrequency domain calculation methods can befound in the SIMPACK NVH module.

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Add-on Modules SIMPACK Interfaces

SIMPACK’s functionality may be easily extended with add-onmodules.

Kinematics and Dynamics is the basic moduleof SIMPACK.

Many add-on modules are also availablefor special applications and functionalities.

The SIMPACK add-on modules for specificapplications– SIMPACK Automotive+

– SIMPACK Wheel/Rail– SIMPACK Engine

SIMPACK fits perfectly into the CAE environ-ments of CAD, FEA and CACE systems.

FEA interfaces With the powerful FEA interface FEMBS, SIMPACK has the reputation for being thetechnological leader for the integration of flexible bodies into a multi-body software.

SIMPACK’s FEA interfaces can import flex-ible parts from any of the leading FEA tools.Unique features are offered to adapt the flex-ible body to its mounting conditions in themulti-body system and to guarantee extremelytime efficient simulation, even for large struc-tures such as car and railway vehicle bodies.

CAD interfaces Once created, CAD data can be easily incor-porated into a SIMPACK model.

With its CAD interfaces, SIMPACK is linked to the main data source of today’sindustry and likewise makes SIMPACK’s out-standing solver available to CAD designers.

CACE interfaces (Matlab Simulink)With SIMAT and MATSIM suitable interfacetechnology is offered for any mechatronicsimulation task. SIMPACK models may beexported to MATLAB or MATLAB models maybe exported to SIMPACK (using the RealtimeWorkshop). Additionally the benefits of bothsolvers may be used in conjunction via co-simulation.

The previous missing link between Simu-link and FEA/CAD data may now be realisedby SIMPACK.

Interface to durability programsFor durability simulation using multi-body, FEA and fatigue simulation, SIMPACK offersleading edge interface technology that sup-ports the challenging task of predicting thelife cycle of mechanisms.

The add-on modules for different functionalities– CONTACT mechanics – enables the

user to define arbitrary shaped contact surfaces and carry out a contact simulation

– USER ROUTINES – enables the user to define their own modelling elements (e.g. force elements)

– NVH (noise-vibration-harshness) – supports better simulation of high frequency vibratory systems

– SIMBEAM (flexible bodies) – enables the user to interactively create spatial, flexible beam structures directly in SIMPACK

– CONTROL – enables the user to build up mechatronic systems

– CODE EXPORT – enables the user to export SIMPACK models as FORTRAN or C code (e.g. for use in HIL systems)

INTEC prides itself in offering the best possible consulting andsupport.

INTEC has now become the market leader in the field ofrailway simulation.

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INTEC GmbH Consulting and Engineering

INTEC GmbH is the company which developsand markets SIMPACK.

Along with the SIMPACK software suiteand software training courses, consulting andengineering is also offered.

INTEC GmbH provides maintenance serv-ices, comprising of SIMPACK upgrades as wellas dedicated hotline and support services.

One of INTEC's key priorities is to give SIMPACKusers the best support possible. The hotlineteam prides itself in assisting SIMPACK users.

There is even a project room available atINTEC GmbH, which can be used by customerswho would like comprehensive support fromthe INTEC staff.

INTEC's Consulting Services Group provides a wide range of engineering services to helpyou implement multi-body simulation fordeveloping better products. Typical projectareas are– Customisation of SIMPACK– Creating SIMPACK models according

to customer specification – Problem solving – Complete engineering projects – Basic research in the field of multi-body

simulation

The prices for engineering or consulting tasks are based on the complexity of the pro-ject and are evaluated on a project-by-projectbasis.

INTEC (as spin-off from the DLR)was founded in 1993 by Dr. AlexEichberger to offer software andengineering services to meet theindustry demands on multi-bodysimulation.

1996 Dr. Lutz Mauer, a respec-ted expert in railway engineering,joined the executive board and thecompany changed its legal statusto a limited liability company, aGmbH. SIMPACK WHEEL/RAIL and AUTOMOTIVE+ opened the door for INTEC to the rail and automo-tive industry.

1998 SIMPACK went on the international market with licencesbeing sold in Korea, England,Japan and USA.

Model Databases for railway systems

Creation of a complete vehicle model with flexible components

Planar Kinematic Mechanisms

Courtesy of DaimlerChrysler

Courtesy of Siemens AG

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Training Courses

INTEC GmbH offers various training coursesranging from SIMPACK beginner courses toexpert user courses concentrating on specificfunctionalities.

SIMPACK Basics training is the first step in getting to grips with the functionality of SIMPACK and is a prerequisite for further training courses.

If you would like additional information or brochures please contact us or visit our website at www.simpack.com.

Application Training Courses– SIMPACK Automotive+ Training Course– SIMPACK Wheel/Rail Training Course– SIMPACK Engine Training Course

Specialist Training Courses– User Routines Training Course– Contact Mechanics Training Course– NVH Training Course– Code Export Training Course

Training Courses for the Use of Interfaces– Simulink Interfaces Training Course

(SIMAT, MATSIM)– FEMBS Training Course

INTEC GmbH, Wessling

INTEC Dynamics Ltd.Cambridge Road Industrial EstateWhetstone, Leicester LE8 6LHUnited KingdomTel.: +44 116 275 13-13Fax: +44 116 275 13-33 info@intecdynamics.co.ukwww.simpack.com