MECE3030U Lab 4 Motion Simulation

8/10/2019 MECE3030U Lab 4 Motion Simulation

1/15

1

MECE3030U Computer-Aided Design

Lab 4 Manual

Objective:

Understand the types of simulations you can perform with NX Motion Simulation

Understand the Motion Simulation directory and file structure

Learn how to create a motion simulation

Process:

1. Open ICE Assembly (you can download from Blackboard), then choose FileTab

ApplicationsMotion Simulation.

Figure 1. ICE assembly and Simulation Applications

Note: you can use Motion Simulation to simulate and evaluate mechanical systems for

things such as:

Displacements, velocities, and accelerates

Range of motion


2/15

2

Reaction forces, inertia forces and torques, and forces and moments transmitted

between bodies

Lock-up positions

Interference

Capture of loads for finite element modeling

2.

Inside Motion Navigator, right click ICE assembly, create New Simulation.

2.1. First, the Environmentdialog box popup. Check Kinematicsas Analysis Type,

click OK. You can change the Simulation Nameif you want.

2.2. The Motion Joint Wizardappears. Click Cancel.


3/15

3

2.3.

Right click Motion 1under Motion Navigator, create New Solution. Timeis the

duration of the motion simulation in seconds, Stepsis the number of iterations the

software will calculate in the given time. Make sureto choose XCdirection as Specify

Directionunder Gravity. Click OK. Click OKfor warning

3. We will create following Links in this step:

3.1. Link 1: choose Home TabSetupGroupLink, choose Crank 2part for this

Link (you can change the Name if you want. For this lab, we will use default name

for all Links and Joints). Uncheck Fix the Link. Click Apply tocreate Link 1and

keep Linkdialog active.

Because this is a Kinematicssimulation, mass properties are not required. Therefore,

for each link, use Nonefor the Mass Propertiesin the Link dialog box.


4/15

4

3.2. Now we will create Link 2and Link 3. Select 6 parts (Connecting Rod)

highlighted on the following picture as Link 2. Click Applyto create Link2.


5/15

5

3.3. Select another 6 parts (Connecting Rod) highlighted on the following picture as Link

3. Click Apply to create Link 3.


6/15

6

3.4. For Link 4, uncheck all the parts except Connecting Rodand Piston Headinside

Assembly Navigator, click Piston Headand Bearinginside Piston Head

highlighted in the following picture, click Apply.

3.5. For Link 5, click Piston Headand Bearinginside Piston Headhighlighted in

the following picture, click Apply.


7/15

7

3.6. Finally for Link 6, we will create Fix Link. Check all the parts inside Assembly

Navigatorto show them on the screen. Select Cylinder Displacementpart as

highlighted in the following picture. Check Fix the Linkunder Settings. Click OK

to finish creating Links.

4. Now we will create the Joint.

4.1. We have already created Joint 1(Fix Joints) when we created the Fixed Link 6.

Choose Home TabSetupGroupJoint, Joint 2will be the Revolute Jointon

L001. Make sure you choose Revolutejoint as Type. Under Actiontab, select L001

(Crank 2) as Select Link, set Arc/Ellipse/Sphere Centerfor Specify Origin,

choose Edge in Crank 2highlighted in the following picture, set YC-axisas

Specify Vector, under Basetab, leave it empty, click Applyto create the J002.


8/15

8

4.2. For Joint 3, we will create the Revolute Jointbetween Link 1and Link 2. Under

Actiontab, select L002(Connecting Rod) as Select Link, set Arc/Ellipse/Sphere

Centerfor Specify Origin, choose Edge in Connecting Rodhighlighted in the

following picture (its Bearing center), set YC-axisas Specify Vector, under Base

tab, select L001 (Crank 2) as Select Link, then click Applyto create the J003.


9/15

9


10/15

10

4.3. For Joint 4, we will create the Revolute Jointbetween Link 1and Link 3.

Follow Step 4.2 and select Link 3instead of Link 2under Select Link. For the

Specify Origin, choose Bearing Centerof Link 3. (You can see Joint 3and 4are

located at the center of the Link 2and 3)


Follow Step 4.2 and select Link 4as Select Linkunder Actiongroup, select Link2as Select Linkunder Base group. For the Specify Origin, choose Centerof

Connecting Rod.


11/15

11


Follow Step 4.4 and select Link 5under Action, select Link 3under Base. For the

Specify Origin, choose Centerof Connecting Rod.


12/15

12

4.6. For Joint 7, we will create the Slide Jointbetween Link 4and Link 6. Make sure

you choose Slideas Type. Under Actiontab, select L004 (Piston Head) as Select

Link, set Arc/Ellipse/Sphere Centerfor Specify Origin, choose Edge in Cylinder

Displacementhighlighted in the following picture, set XC-axisas Specify Vector,

under Basetab, select L006(Cylinder Displacement)as Select Link, then click

Applyto create the J007.


13/15

13

4.7. For Joint 8, we will create the Slide Jointbetween Link 5and Link 6. Follow

Step 4.6 and select Link 5 instead of Link 4under Action Group. Choose Edge in

Cylinder Displacement (Link 7)highlighted in the following picture, then click OK

to create the J008.


14/15

14

5.

Now we will create Driver for this motion simulation. Choose HomeTabSetup

Group Driver, select Joint 2as Select Driver Objectin Driver Objectis

highlighted, set Constantunder RotationList, input Initial Velocityas 100

degrees/sec andAcceleration as 50 degree.sec^2 ,click OKto finish.

6. Right-click Solution_1 in Motion Navigation, choose Solve. Close the Information

dialog. (The simulation will need to be re-solved if there are any future changes to

links, joints, drivers.... etc.)


15/15

15

7. Choose HomeTabAnalysisGroupAnimationGalleryAnimation, you can

see the result.

MECE3030U Lab 4 Motion Simulation

Documents

Transcript of MECE3030U Lab 4 Motion Simulation