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Billiards

GUI Familiarity Level Required: HigherEstimated Time Required: 30 minutes

MSC.ADAMS 2005 r2

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Topics CoveredTopics Covered

In this tutorial you will learn how to:

To start this example you must first download “billiards_start.bin“ file

If you have any difficulties, import the “billiards_shortcut_1.bin” file and proceed from pg 19

If you have any difficulties, import the “billiards_shortcut_2.bin” file and proceed from pg 24

If you have any difficulties, import the “billiards.cmd” file and proceed from pg 24

1. Create a sensor

2. Create design variable

3. Create single component force

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ProblemProblem

Create a sensor between the ball and the pocket so that when the ball hits the pocket it trigger the sensor.

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What You Should AccomplishWhat You Should Accomplish

When you complete this tutorial you will have a Adams simulation of a billiards game

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Getting StartedGetting Starteda. Start Adams

b. Select Open an existing database radio button

c. Click OK

d. Search for file billiards_start.bin

e. Click Open

e

db

c

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Create a SensorCreate a Sensor

a. Click Simulate menu Sensor New

b. Enter DM(PART_1.main, MAR26) in Expression text field

c. Verify that the Non-Angular Values radio button is on and that the pull down menu is set to less than or equal

d. Enter 50.0 in Value text field

e. Enter 1.0E-03 in Error Tolerance text field

f. Turn on Terminate current simulation step and check box and verify that the stop radio button is on

g. Click OK

a

b

c

de

f

g

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Create SensorsCreate SensorsCreate 3 more sensors, with the same values as show below:

DM(PART_1.main,MAR27

Value = 50.0

Error Tolerance = 1.0E-03

DM(PART_1.main,MAR_5

Value = 50.0

Error Tolerance = 1.0E-03

DM(PART_1.main,MAR28

Value = 50.0

Error Tolerance = 1.0E-03

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Create Design VariableCreate Design Variablea. Click Build menu Design variable New

b. Enter .billiards.hard in Name text field

c. Enter 1.0 in Standard Value text field

d. Select +/- Delta Relative to Value from Value Range by pull down menu

e. Enter -1.0 in –Delta text field

f. Enter 1.0 in +Delta text field

g. Click OK

a

b

cd

ef

g

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Creating Design VariablesCreating Design VariablesCreate 2 more design variables with the following values:

Name = .billiards.radius

Standard Value = 75.0

Value Range by = +/- Delta Relative to Value

-Delta = -1.0

+Delta = +1.0

Name = .billiards.x

Standard Value = (PART_2.main.loc_x)

Value Range by = Absolute Min and Max Values

Min. Value =

Max. Value =

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Create Single Component ForceCreate Single Component Force

a. Select Force (Single Component) from Forces tool stack

b. Select Two Bodies from Run-time Directions pull down menu

c. Click PART_3 PART_2 PART_3.main PART_2.main

a

bc

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Modify Single Component ForceModify Single Component Force

a. Rename SFORCE_3 to SPHERE_SPHERE_1

b. Right-click force, select FORCE:

SPHERE_SPHERE_1 Modify

c. Click button

d. Enter

impact(dm(PART_2.main, PART_3.main),vr(PART_2.main,

PART_3.main), 35.0, hard*1.4, 1.2, 2.7/(hard*hard), 0.35)

In define a runtime function text field

e. Click OK

b

d

c

e

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Create Single Component ForceCreate Single Component Force

Create a second single component force between the cue ball (white) and the 9 ball (yellow) with a function:

impact(dm(PART_1.main, PART_2.main),

vr(PART_1.main, PART_2.main),

50.0, 2.6, 1.2, 5.1E-004, 0.5)

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ModelModel

This is what your screen should look like whenyour model is complete

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Topics CoveredTopics Covered

In this tutorial you will learn how to:

1. Create a sensor

2. Create design variable

3. Create single component force

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Best PracticesBest Practices

• Make sure sensors are set correctly

• Make sure that the design variable are set correctly

• Check the forces to see if there are acting on the right parts

• Check the single component force functions