adams lecture 1 introduction to adams
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Introduction to ADAMS
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Multi-Body Analysis
The analysis and simulation of mechanical systems Systems can consist of rigid or flexible bodies
Bodies are assembled using rigid joints or flexibleconnections
System elements such as springs and dampers canbe nonlinear
The mechanisms can move through largedisplacements
Automatic formation and solution of equations ofmotion
Animated and plotted presentation of results
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MSC ADAMS Background
MSC Software develop and maintain theADAMS software
ADAMS (Automatic Dynamic Analysis ofMechanical Systems)
Analysis Types
Kinematic
Static
Quasi-static
Dynamic
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ADAMS Simulation Examples
4Videos from MSC.ADAMS Support Files
Cam Follower.wmv
Five Bar Linkage.wmvFork Lift.wmv
Suspension.wmv
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Modelling Process
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MODELLING
PREPROCESSING
ANALYSIS
POSTPROCESSING
Breakdown of a real world scenario intoa state suitable for ADAMS modelling
Generation of the model in a relevantcode to import into the software
With the imported model, setup therequired analysis type to replicatethe desired real world scenario
Process and analyse the results ofthe simulation
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Double Wishbone SuspensionModel
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Aston Martin DoubleWishbone Suspension
2D ADAMS Modelof a DoubleWishbone
Suspension
3D ADAMS Modelof a DoubleWishbone
Suspension
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2D Suspension Model Parts(Modelling)
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02
05
01
06
02
03
04
04
03
07
x
y
01
PART ID.
POINT NO.
GROUND
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2D Suspension Model Markers(Modelling Continued)
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02
05
01
06
02
03
04
04
03
07
01
0404
0407
0107
0402
0302 0301
0406 0206
0403
0205
0101
0105
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Ground, Parts and Markers(Modelling Continued)
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Ground A part which cannot move
Attaching other parts to the ground fixes their position
e.g. PART/01,GROUND
Parts Defines individual parts of the system e.g. upper wishbone
Each part has to have a centre of mass (CM), mass (MASS)and inertial properties (IP) defined
e.g. PART/02,CM=0200,MASS=1,IP=1,1,1
Markers Defines points on the parts
Each marker has to have its position defined (x, y, z)
e.g. MARKER/0200,QP=0.42,0.68,0
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2D Suspension Model Joints(Modelling Continued)
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x
yy
y
y
x
x
x
CYL
REV
REVSPH
MOTION
Degree of Freedom (DOF) can be Calculated
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Joints (Modelling Continued)
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Joints
Joints are required to connect two parts together
Each joint needs to have two marker to define it (the twomarkers need to be from separate parts)
Some joints need to have their markers aligned correctly inorder to work properly
e.g. JOINT/01,REV,I=0301,J=0101
Spherical JointRevolute Joint Cylindrical Joint
Revolute Joint.wmv Ball Joint.wmvCylindricalJoint.wmv
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adm File Generation(Postprocessing)
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Imported Model (PostprocessingContinued)
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Simulation Motion (Analysis)
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30 d
-30 d
1.0 TIME (S)0.5
Motion Statement The motion of a model needs to be defined within the adm file
A motion has to be applied to a joint and given a value
MOTION/01,JOINT=01,ROTATION,FUNCTION=-30D*SIN(TIME*360D)
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Simulation (Analysis Continued)
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Simulate Model Length 1 seconds (End Time)
Steps 40 (Steps)
Data output every 0.025 second
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Complete 2D SuspensionModel Simulation
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2d-susp.wmv
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Review Results (Postprocessing)
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2D Suspension Model Results
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Completed Pendulum Model
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