LMS Virtual.Lab_Military_Overview_JK

LMS b Motion for Military ApplicationsAgenda1 2 3 4Industry processes and challenges Solution value proposition to address challenges Solution content ApplicationsLMS 2008Industry Challenges for Military Vehicle EngineeringBusiness challenges Deliver with innovative designs Achieve breakthrough in reliability and performance Reduce time-to-market Reduce costs and riskEngineering challenges Shorten the design cycle: Optimize the design: costs, weight, performance, manufacturability, durability, and reliability Develop more variants on fewer platforms Increase development productivity Simulate dynamic problems which are too dangerous or impossible to measureLMS 2008Agenda1 2 3 4Industry processes and challenges Solution value proposition to address challenges Solution content ApplicationsLMS 2008LMS bFrontloading performance engineeringDrive early design choices from the form, fit and function perspectiveAccurate and realistic system-level simulationReduce the need for phyiscal prototype testingMulti-tier process integrationAccelerate simulation process by Integrating design and simulation Integrating structural and attribute analysis Integrating virtual simulation and physical testingStructuresMotionDurability/FatigueNoise&VibrationAcousticsOptimizationLMS 2008LMS b MotionGeneral purpose Mutibody dynamic simulation toolA unified framework for multidisciplinary virtual simulation Open architecture for customization and 3rd party packages Best stability and accuracy at all frequency ranges Design-right-first-time by system-level simulation Quick analysis or in-depth investigationsFocusStructuresMotion DynamicsDurability/FatigueNoise&VibrationAcousticsOptimizationLMS 2008DADS Historical BackgroundDADS - Dynamic Analysis and Design SystemDADS was developed at the University of Iowa with funding from TACOM in the early 1980’s Used for simulating mechanical systems and solving the equations of motion as a system of DAE’s differential algebraic equations Used by nearly all military vehicle manufacturers and TACOM for 20 years b Motion is the next generation that takes technical capability to the next level and adds multi-attribute interoperability (Durability, NVH, Acoustics, Optimization)LMS 2008Military and Commercial Vehicle DynamicsDADS was used widely by military vehicle manufacturers and military procurement engineers Solve the equations of motion for the constrained mechanical system to predict position, velocity, acceleration, and loads as timedomain results Extensive simulation of on and offroad conditions Model bodies as Rigid and flexible Solutions to predict mobility, stability, safety, and reliability Main advantage was improved accuracy and numerical stability over competing methodsLMS 2008Agenda1 2 3 4Industry processes and challenges Solution value proposition to address challenges Solution content ApplicationsLMS 2008LMS b MotionModeling processAutomation AutomationModular assembly Mechatronics VerticalsCAD CADCreate in VL Create in VL Or import Or importKinematics KinematicsJoints Joints Constraints Constraints Initial conditions Initial conditionsDynamics DynamicsForces (Gravity, Forces (Gravity, Craig-Bampton or Craig-Bampton or Stiffness, Damping, Stiffness, Damping, test deformation test deformation Friction) Friction) modes modesFlexible Flexible bodies bodiesSolving SolvingFast, accurate Fast, accuratePostPostprocessing processing2D / / 3D 2D 3D Root cause analysis Root cause analysisVL DurabilityVL NVH VL AcousticsTEST dataParameterization OptimizationLMS 2008Easily model extremely complex track mechanisms and simulate its behaviorLMS b Motion ‘Track Motion Simulation’Target use:Modeling and simulation tool to accelerate the design of a track vehicle’s dynamic behaviorMain FeaturesTrack motion templates for easier modelingOption for simplified “super-element”model quickly predicts vehicle behaviorAuto-recursive motion solverMain benefitsEasily model extremely complex track mechanisms Predict loads throughout the system Quick analysis or in-depth investigationsDedicated Track System Modeling InterfaceInterface Collects DataDefines multiple modelelements from minimal dataDefine initial conditionsDefines the track layoutCreate vehicle modelCreate vehicle model (excluding track) using b MotionStart from defense or agriculture template modelsModel can include complex modeling techniques, such as parameterization, flexibility, controls, etc.Create track pad and connection templateCreate two track pad bodies (geometry) to replicate around track pathModel connections between the track pad templates, e.g. revolute joints and bushings Model contact elements between track pads and ground, rollers, sprockets, etc.Create discrete track definitionPick bodies used for pad definition; specify pad parametersPick rollers (sprocket, idler, road wheels, etc.) to wrap with trackCompute track pathBased on roller dimensions and position, interface computes pathReports basic information on length, number of pads, average gap, and total gapLMS b Motion helpsBAE Systems Develop Military VehiclesBAE deployed LMS b Motion toEfficiently model track vehiclesVirtually test-drive vehicles on digital tracksBypass the tremendous time and cost ofbuilding and testing multiple prototypesEngineer chassis and suspension for optimaldynamic performanceBAE Systems Senior Engineer:“LMS multibody technology gives engineeringinsights that help deliver the best productsto support the Military....“CRREL Simulation ProjectA project to simulate all details of thediscrete steel trackUsed to predict vibration loads on the groundLoads them used for the seismic signature of the vehicleValidated track modelingUsing Tracked Vehicle Dynamic Models to Generate Virtual Ground Force Data for SeismicSensor DevelopmentJames Lacombe, Daniel Harjes Dr. Mark Moran*US Army Cold Regions Research and Engineering Laboratory(CRREL)LMS b M1A1 Model•Detailed discrete trackmodel used to provideloads and high-resolutionground reactions formobility and applicationslike the CRREL seismicsignature project•Take advantage of newsolid modeler features,extensive parameterization•Animation features provideinsight into complexbehaviorM113 Personnel Carrier Track SuperelementModel used often to studycross country mobilityUses the legacy “tracksuperelement”thatexchanges some modelfidelity for faster simulationperformanceNow Track Superelementand discrete track can becreated from the singletrackbuilder interfaceMine Explosion Impulse•• •Explore modeling for explosive forces acting on track Show transient dynamic response Robust numerical solver makes high speed events solution practical and accurateLMS 2008AAAV ModelFrom previous work done with General Dynamics in Maryland Model focused on mobility and predicting loads as the vehicle drives over terrainLMS 2008LMS b Motion -Other related applicationsRelated Applications: Construction EquipmentModel used often to study mobility Uses the discrete track model Predict dynamic loads, detracking, traction limitsLMS 2008Agriculture Industry - Deere• • • •Large agricultural tractor model made using discrete track segments Used to design new tracked tractor Ongoing use to make design changes Simulation methods derived from military experience to assist DeereLMS 2008Firing ImpulseSimulate any real-world eventEfficiently model a variety of military vehicles Understand complex dynamic events that are hard to measure and visualize Explore scenarios that are too dangerous to test Predict dynamic behavior before prototypes are available Evaluate design alternativesLMS 2008AMSAA Physics of Failure InitiativeModel for “physics of failure” investigations and develop solutions to field failures • Compare US Army test data and develop validated multibody model for future analysis needs • Create durability and reliability predictions for one or many components•LMS 2008Terrain InteractionSimulate all types of terrain interaction Tires – standard, TNO, CDT, or custom tire forces Tracks – superelement or discrete track systems Implements and other hardware using contact force featureLMS 2008Missile LaunchStudy Guide rail contact Misalignment Flexibilty of support arm Missile thrust loads Work with US Army Missile Command to support CAE problem solving initiativeLMS 2008Simulation Used by Military and Aerospace OrganizationsMajor aerospace customers Boeing Lockheed Martin Airbus Cessna Gulfstream Embraer Raytheon Simulation to predict landing gear loads Flap mechanism movement Latches Rudder and elevator behaviorLMS 2008TACOM Simulation Technical PapersLMS 2008TACOM Truck ModelsTacom has used DADS and b Motion for nearly 25 years Require US Army vendors to do simulation before submitting proposal for selling new trucks and combat vehicles Continue to be recognized as simulation leaders throughout the US Army and other military branches TACOM papers and presentations show comparisons between simulations and field testsLMS 2008Stewart and Stevenson Truck (Armor Holdings/BAE)Simulation required by TACOM for all major product upgrades of the MTV, LMTV, and FMTV trucks Predict stability over bumps, potholes, and in lane change maneuvers Study driveline loads for 2 and 4 wheel drive system over rough roads Predict if 6 watt absorbed power limit is exceeded driving on rough roads at several speedsLMS 2008SEI Military Tank TrailerSimulate complex system dynamics and loads Predict ability to maneuver in tight spaces Predict behavior of the hydraulic loadleveling suspensionLMS 2008LMS b Motion - Integrated Simulation EnvironmentLMS 2008LMS b Motion Advanced Flexible BodiesIndustry‘s DemandsConvenience in making parts flexible in a model Access to a FE solver from LMS; ease of use Using flexible bodies in simulation to improve accuracy of overall system loadsLMS b Solution: Advanced Flexible BodiesAutomatic generation of a set of flexible body modes Automatically creates axis systems, virtual parts, restraints, and analysis cases for Craig-Bampton case Automation possible: Driver process can be scriptedLMS 2008Engine DynamicsSolution for flexible crank train, valve train, timing belt, timing chain and gear dynamic analysisCranktrain DynamicsPredict internal loads throughout the engineInclude flexible body effects convenientlyValvetrain DynamicsPredict detailed dynamics where flexibility plays an important role Include any level of detail from simple to complex as needed Speed-sweep analysis case manages engine RPM run-upsChain DynamicsSimplifies setup of downstream NVH or Acoustics analysis in LMS bLMS 2008LMS b Motion Versatile Contact ModelingIndustry‘s DemandsImproved performance that reduces total CPU time for models with many contact force elementsLMS b Solution: Improved contact performanceNew logic improves efficiency solving contact location Especially important for models with large number of contact elements Reduces total CPU time up to 20% Important for discrete track modeling and other appllicationsLMS 2008Motion Export to LMS b Noise & VibrationIndustry‘s Demands Single digital prototype for across attributes Take advantage of existing models to create data used for Noise & Vibration analysisMotion to NVM Export Save time creating Noise & Vibration models based on Motion Mechanism assembly Rigid and flexible bodies Choose Motion simulation time step for export FE nodes and elements for MBS body, joint and force elements Automatic setup of assembly connections & properties based on mechanism linearizationLMS 2008LMS b LMS bMotion Also Widely Used in Automotive ApplicationsMost Versatile Simulation in IndustryPioneering new technologies – flexible bodies, auto-flexbodies, flexible contact... Dedicated GUIs: powertrain, suspension, full vehicle, gears, tracked vehicles… Close connection with Matlab, AMESIM, and DSHPlus controls and hydraulics simulation modelsBenefitsDesign-right-first-time by system-level simulation Simulate real-life behavior ranging from simple sliders to high-fidelity full vehicle models Accurately predict loads for structural analysis, durability and noise & vibration studiesOptimize any mechanical systemLMS 2008LMS b Motion for Vehicle SimulationFull Vehicle Simulation Support of subsystems to assemble the Vehicle Allows subsystems to be modeled separately Dedicated steering, driveline, braking system modeler Exhaustive list of vehicle ISO handling maneuvers Integration of IPG Driverfront suspension subsystemdriveline subsystemVehicle modelrear suspension subsystembraking subsystemsteering subsystemLMS 2008IPG DriverThe IPG driver adds the actions of the human driver to full vehicle simulations Seamlessly integrated in b Motion Allows the most realistic driving simulations allowing to study and optimize vehicle dynamics based on a virtual prototype Through partnership with IPG Automotive GmbH (www.ipg.de) HQ located in Karlsruhe, Germany Leadership position in driver modeling (+15 years experience)The IPG driver calculates: gas, brake and clutch pedal position, gear shifter position steering wheel angle/torqueLMS 2008Automation of Complex Repeated Simulationsb Motion offers a powerful way to vary parameters VB Interface manages setting parameter values and running all configurations Present results in MS Excel or text files as an alternativeParameter definitionPost-processing SolvingLMS 2008Process efficiency Appropriate application of 1D – 3D simulationComponent – Subsystem ModelsComponent – Subsystem RefinementIncreasing Design DetailsIncreasing Design DetailsLoads for component durability analysisRide & HandlingRide & Handling - ComfortLMS bChassis ConceptSuspension type Hard points Bushing, damper settingsLMS bChassis Detail – Body ConceptDetails subframes – incl. lexibility Body concept model - incl. flexibility Tire modelsRoad NoiseScalable 1D and 3D simulation for Vehicle Dynamics Function of Design Stage and Simulation PurposeLMS 2008LMS b LMS bOptimization Value propositionEasy access to advanced optimization technologyFor ALL and ACROSS b applications Fast and easy to use from within the b environmentBenefitsOffers you more insight in your design Improves and optimizes your design Assesses the quality of your designQuickly explore the Design SpaceLMS 2008LMS b Motion - SummaryLMS 2008LMS bLMS b MotionMost Efficient, Complete and Accurate MBS Simulation in Industry Developed with US Army funding in 1980-83 Only fully CAD associative, truly scalable and cross attribute solution Most accurate solvers covering all frequency ranges Unique combined model topology – recursive and cartesian DAE Benefits Design-right-first-time by system-level simulation Simulate real-life behavior ranging from simple sliders to highfidelity full vehicle models Accurately predict loads for structural analysis, durability and noise & vibration studiesSimulate any mechanical systemLMS 2008Dedicated Military Vehicle Training MaterialTraining examples tailored to the customer needs Special focus on requested modeling issues Obtain useful results by the end of the week Learn to use all the capability of b CAD import Parameterization Knowledgeware Design Tables Automation Design sensitivty Optimization DurabilityLMS 2008Thank you。