Broch Gtsuite Latest

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GT -SUITE is an integrated CAE program for design analysis of engines. The most uniquefeature of this highly advanced tool is that it is containedin a single application - a new paradigm in engine sim-ulations. There are six components in GT-SUITE withthe following main capabilities:

Advanced Features "Virtual Engine/Powertrain/Vehicle" in a single executable The only tool that can take a project from initial concept

studies to integrated analysis of the complete system Users can choose from alternative physical models, with

different levels of complexity, allowing rapid simulationswith less detail, while providing more detail when needed

Advanced built-in functions are provided at no extra cost(sophisticated optimizers, control library, job distribution serv-er, user-defined compound templates, etc.)

Multi-case studies are possible in a single run, withparametric substitution of variables

Users can easily incorporate their own models

Model files are stored in open XML formatSimulation output is stored in MySQL commercial database

Table output comes in HTML and PDF formats

GT-SUITE

All six components of GT-SUITE are based on a common setof multi-physics libraries, and thus have a large degree of commonality among them. There is a single shared user interface, from which the user performs all pre- and post-processing, and these functions are identical for all six GT-SUITE components -- no need to learn multiple tools.

GT-POWER :Engine simulation for performance and acousticsanalysis, with full control capabilites

GT-DRIVEVehicle performance and cycle analysis for fuel economyand emissions, and driveline component dynamics

GT-VRAIN:

Valvetrain kinematics, dynamics and tribology,camshaft vibrations, chain/gear drives, cam design

GT-FUEL:Injection system pressure and flow dynamics, hydraulicsystem analysis

GT-COOL:Engine heat management and cooling systemanalysis

GT-CRANK :Crankshaft dynamics and torsional vibrations, enginebalance, block vibrations, mounts, bearing oil films

Virtual Engine / Powertrain / Vehicle

Insert image ^

GT-ISE Datafile is a multi-page document:click tab to open sub-assembly page

Graphical Interface: GT-ISE

Flow Components

View whole model

Hierarchy:Template

Object Part Mechanical

Components


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Graphical User Interface (GT-ISE) Data file (GTM), written in XML format, can be used as a

database storing models and sub-models for future reuse 2-D viewer shows scale view of input geometry 3-D viewer of flowsplit geometry Automated integrity checks reduce user error Built-in record of model revision history Run-time monitors display results during execution Formula editor allows use of equations to define model

parameters as functions of other parameters Models can be annotated with text Mini-map provides birds-eye-view of complex models Encryption feature for OEM/supplier model sharing

Model building Models are built from a library of supplied elements Object-based design reduces user effort by eliminating redun-

dant data entry Model parts can be copied from project to project and from

one GT-SUITE component to another Models divided into sub-assemblies, which can be placed

on separate pages in a given project or stored in externalfiles

Sub-assembly encryption for model sharing between OEMsand suppliers

Post-processor Graphically based data post-processing Quickly generate 2-D and 3-D plots of any quantity Combine data from different cases or different simulations,

or from tests, in one plot Re-useable post-processing templates allow instant cross-

plotting of results from different simulations Import test data from ASCII or MS/EXCEL files and

process them the same way as simulation data Perform various math operations on data in all plots (sum, dif-

ference, integral, derivative, FFT...) Animation of transient processes

User-definable tabular output of computed results

Keep notes on model evolution

Add annotations to canvas

GT-POST RLT (result) post-processing page

Primary function of this pageis to show results graphically

Scale view of pipes and flowsplits

GT-ISE provides tools for model tracebility

GT-POST has several modes for graphical and table-based data display

GT-SUITE

GT-POST Case Sweep FFT Macro: Easily createcontour FFT plots from multiple cases of time data

Simulation Tool . . . Is Here Today


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GT-SUITE Sophisticated Software Engineering Multi-circuit solver optimizes the execution of complex

models (combined mechanical, fluid, control and thermalnetworks)

Dynamic memory allocation allows simulation of very largeand detailed models

Batch file builder/remote job submission Single and double precision versions supplied Pre-/Post-processing in JAVA for cross-platform compatibility Available for PC (Win/LINUX) and on UNIX workstations

From Concept Design to Detailed

Monitor jobs executing across a network

Multi-circuit system: Compressible liquids (GT-FUEL) on topand combustion gases (GT-POWER) on bottom

Local Workstation

Solver Node

Solver Node

Solver

Node

Solver Node

Solver Node

Distribution Server

Job distribution

EGR distribution in the intake manifold computed by coupling to STAR-CD

Job Distribution over a Network Server software distributes jobs over a network Local workstation sends jobs to the server Server sub-divides multi-case runs into packets Packets are run on all available solver "nodes" Server algorithms balance load, accounting for:

Estimated simulation time of each case Availability of solver nodes Processor speed of the available nodes

Users can monitor and control queued simulations After completion, results from all nodes are recombined into

standard output files and returned to the user's workstation

Coupling To Third-Party Products: Coupled with STAR-CD, FLUENT and FIRE Coupled with Simulink control simulation Socket API allows coupling across network Input and output is integrated with EXCEL User routines allow coupling to user coding


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GT-SUITE Libraries -

the Foundation of GT-SUITE The building blocks of GT-SUITE are its libraries:

Flow and Thermodynamics library Mechanical library Thermal library Control library

Libraries contain solvers, fundamental sub-models, andbasic components (e.g. pipes, shafts, thermal inertias)

The six GT-SUITE applications share these libraries The common libraries and multi-physics connections

enable seamless integrated analyses with GT-SUITE

Flow/Thermodynamics Library Components: pipes, flowsplits, cylinders, and many others Solution of one-dimensional Navier-Stokes equations Finite difference solution on a staggered grid Explicit and implicit solver options Coupled with Star-CD and Fluent for 3-D CFD calculations User-defined "air" can be mixed; can include humidity Fuels: hydrocarbons, alcohols, hydrogen, etc. Full chemical-equilibrium solution with 11 species of prod-

ucts of combustion Real gas / perfect gas options

Advanced models for high-pressure liquids Refrigerant library for A/C applications Inert tracers track flows

Multi-Physics Library Infra

Mechanical Library 1-D, 2-D and 3-D elements and connections Rigid bodies, lumped inertias Flexible or rigid connections Flexible bodies (distributed inertia/stiffness, FE) Kinematic elements, coupled kinematic solution Specialized shape contacts (cylindrical, arc, gear-gear,

cam-roller, cam-follower) Journal bearing oil films Frequency-domain torsional analysis Coupling to hydraulics (linear and rotational DOFs)

Thermal Library Used for modeling heat distribution in structures and circuits,

component temperatures Transient warm-up of exhausts and intakes Temperature dependent material properties

FE solver for the solution of the thermal library Output of BCs for external FE analysis

T A P B

Model of a spool valve

Combines interacting flow and mechanical

components

Flow componentsof a spool valve

Mechanical components of a spool valve

Thermal components model cooling circuit

Heat rejected by electric motor


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GT-SUITE Control Modeling GT-SUITE contains an extensive built-in library of control

elements to model control systems This is a powerful capability which enhances any model Sensors extract many different signals of various types from

all GT-SUITE elements, to be processed by controls Actuators allow variation of virtually anything user may want

to control in any given GT-SUITE element Optionally integrates with Simulink Basic control elements include sum, product, limiter, look-

up, switch, etc. Advanced control elements include derivative, polynomial,

transfer function, math-equation, neural network, etc. Utility for easy calibration of PID controllers is provided Model-based throttle controller

Modeling with Neural Networks Neural networks can be used in GT-SUITE to

model various processes or sub-systems An automated calibration method has been

implemented, which utilizes data produced byDOE over a design space

Primary use is to speed up simulations by replac-ing detailed models with trained neural networks

One can also bring experimental data into a sim-ulation, replacing approximate models

Calibration of a Neural Network by data acquired in a DOE run

Modeling of variable valve actuation by GT-SUITE control elements

ructure Powers GT-SUITE


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INTEGRATION Integrated System Simulations

GT -SUITE provides the ability to executeIntegrated Simulations - the next frontier inCAE applications. It is an industry trend that is gaining inimportance.2

Until now, analysts have been focusing on narrow prob-lem areas, divided/isolated by: Technical areas (e.g. combustion vs. acoustics) Departmental boundaries Limitations of available software and hardware

The resulting neglect of interactions limits the usefulnessof the analysis results, and at the same time it restrictscommunications across teams and departments.

The GT-SUITE approach: a single comprehensive codeaddressing most of the needs covered today by separatecodes, with the following benefits: Interactions between different parts of the system

can be as detailed as needed Capabilities are automatically synchronized in a single

version, launched from a single graphical interface All teams use the same tool, facili tating their

cooperation (they speak "the same language") Data sharing is streamlined (and error-free) Engineers share a "virtual engine/vehicle" model This capability is key for studies of transients Lower cost

Detailed engine model connected by a torque converter to a drivelineof a vehicle. Combines GT-POWER + GT-DRIVE.

This model allows coupled simulationof the entire system, for studies of vehicle acceleration capabilities,general transient operation and control system development.

Coupled solution of engine per-formance and cranktrain dynamics,including block mounts. CombinesGT-POWER + GT-CRANK.

This model allows representation of the effects of combustion variability on block vibration. The variability

produces cylinder pressure variation(top left), which causes irregular

pis ton side for ces (cent er lef t) ,leading to block vibration (bottomleft). The vibrations can be visualized by spectral analysis (bottom center).


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