training on teaching of car development process with an...
TRANSCRIPT
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Jozef Bucha
Training on teaching of car development process with an illustration of ergonomics and
simulations
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What is Adams?
• Automatic Dynamic Analysis of Mechanical Systems
• Development started in 1974 at the University of Michigan
• Mechanical Dynamics, Inc. started with Adams/Solver
• MDI was acquired by MSC in 2002
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Adams Modules in version 2014
• Adams/Solver • Adams/View • Adams/PostProcessor • Adams/Flex • Adams/ViewFlex • Adams/Durability • Adams/Vibration • Adams/Controls
• Adams/Exchange • Adams/Tire FTire • Adams/Insight • Adams/Car • Adams/Machinery
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Adams/Car
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Adams/Car - advantages
• Database structure • Prepared templates • Quick and easy vehicle components changes • Predefined vehicle maneuvers • Incorporated flexibility of bodies • Taylored for vehicle simulations
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Adams/Car – database structure
• All projects are organized in databases • One database prepared by MSC, with sample models
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Adams/Car – templates
• Adams/Car contains around 25 prepared templates • All necessary components of vehicle are prepared
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Adams/Car – data workflow
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Adams/Car – data workflow • Templates - Defines vehicle sub-assemblies topology (that is, how the parts and joints fit together in the model, how information is transmitted, and so on). For example, a template could be a suspension type, which can be defined either as front and/or rear. • Subsystems - A mechanical model that references a template and tailors it by supplying parameters that adjust the template (for example, locations that define part dimensions and spring stiffness). These models are usually a major system of your vehicle, for example, front suspension, steering system, and body. • Assemblies - A list of subsystems and a single test rig combined in a vehicle or suspension assembly. A test rig is necessary to provide an actuation, in your model, for analysis.
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Adams/Car – subsystem Points Part properties Spring, damper, bushing properties
Subsystem
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Adams/Car – assemblies
• Suspension assembly • Full vehicle assembly • General actuations assembly • Fourpost assembly (Adams/Car Ride plugin) • Component assembly (i.e. Tyre analysis)
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Adams/Car – assemblies
• Suspension assembly
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Adams/Car – assemblies
• Suspension assembly
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Adams/Car – assemblies
• Full vehicle assembly
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Adams/Car – assemblies
• Full vehicle assembly
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Adams/Car – assemblies
• Fourpost assembly (Adams/Car Ride plugin)
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Adams/Car – simulation
• Interconnection between Adams modules
.adm file
.acf file
.msg file
.req file
.res file
.gra file
.out file
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Adams/Car – suspension simulation
• Data workflow during suspension simulation
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Adams/Car – suspension simulation
Types of simulation • Quasi static simulations • Dynamic simulations
Quasi static simulation
• Wheel travel analysis • Steering analysis • Roll and vertical force analysis • Static load
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Adams/Car – suspension simulation
Quasi static simulation • Opposite wheel travel
Bound 100 mm Rebound -100 mm
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Adams/Car – suspension simulation
Quasi static simulation • Steering
Upper steering limit -360 deg Lower steering limit -360 deg
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Adams/Car – suspension simulation
Dynamic simulation
STEP (x, x0, h0, x1, h1) STEP(time,2,0,4,100)
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Adams/Car – suspension simulation
Static load
Wheel vertical force 0-2500N
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Adams/Car – suspension simulation
Outputs from simulations • Data of parts of assembly • Data of joints, springs, dampers, bushing • Testrig data • 25 suspension characteristic of non steerable suspension • 11 suspension characteristic of steerable suspension
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Adams/Car – full asembly simulation
• Data workflow during full assembly simulation
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Adams/Car – full asembly simulation
• Vehicle maneuvers are carried out with Driving machine
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Adams/Car – full asembly simulation Types of simulation • Dynamic simulations • Static and quasi static maneuvers • Adams/Smart Driver
Dynamic simulations • Open loop steering events • Cornering events • Course events • Roll stability events
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Adams/Car – full analysis simulation
Course events - ISO lane change • ISO-3888: Double Lane Change
Vehicle speed 100 km/h
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Adams/Car – full analysis simulation
Course events – 3D course • 3D road with artifical obstacles
Vehicle speed 30 km/h
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Adams/Car – full analysis simulation
Adams/Car Truck plugin
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Adams/Car – full analysis simulation
Vehicle speed 80 km/h
Open loop steering event– single lane change
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MSC Software licences and knowledgeware • Students editions http://www.mscsoftware.com/student-editions • Students competitions http://www.mscsoftware.com/page/formula-student • Academic motion bundle http://www.mscsoftware.com/teach-msc • Academic learning center http://www.mscsoftware.com/msc-academic-learning-center • Adams Tutorial Kit for Mechanical Engineering Courses http://www.mscsoftware.com/page/adams-tutorial-kit-mechanical-engineering-courses
Adams Tutorial Kit
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Modules not maintaned by MSC • Adams/Engine • Adams/Aircraft • Adams/Rail Last versions in Adams 2008. Currently maintained by VI-Grade
http://www.vi-grade.com/
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Modules not maintaned by MSC
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Usage MSC Adams on FME STU • 150 licenses of Adams 2005 • 2 licenses of Adams 2014 • Unknown nmber of student licenses
http://atc.sjf.stuba.sk/