Figure 4.6 Physical Model of Front Suspension
4.2.2 Building Model
1. To start ADAMS/View and Setting Up Your Work Environment (1) To start ADAMS/View in the Windows environment
1) Select Start. start ADAMS/View, Select Create a new model from the Welcome dialog box.
2) Replace the contents of the Model name text box with FRONT_SUSP. 3) Select OK.
(2) Setting Up Your Work Environment.
1) Setting up units: From the Settings menu, select Units. Set the units of length to Millimeter, the units of length to Kilogram, Force to Newton, Time to Second, Angle to Degree, Frequency to Hertz. Select OK.
2) Setting up Working Grid: From the Settings menu, select Working Grid. Set the grid size along X to 750 and Y to 800, and the grid spacing at 50. Select OK.
3) Setting up Icons: From the Settings menu, select Icons. In the New Size text box, enter 50. Select OK.
4) To display the Coordinates window: From the View menu, select Coordinate Window.
2. Creating Design Points
1) Right-click the Rigid Body tool stack (Link tool is on top by default) to display the tool stack containing the Point tool.
2) Select the Point tool and click the locations shown in Table 4.7 to place design points. Use the default settings for point, which are Add to Ground and Don’t Attach.
Table 4.7 Points Coordinate Locations
Points X Location Y Location Z Location
LCA_outer 0 0 0 UCA_outer 57.25 324.68 14.39 UCA_inner 399.51 391.21 44.90 LCA_inner 485.65 81.27 -86.82 Tie_rod_outer -26.95 100 -107.71 Tie_rod_inner 439.55 181.19 -252.50 Knuckle_inner 18.91 107.24 4.75 Knuckle_outer -235.05 102.81 3.86
3. Creating the Kingpin
1) Select the Cylinder tool . 2) Select New Part.
4) Click LCA_outer, then UCA_outer to create a Cylinder between the two points. 5) Rename the cylinder part, to Kingpin.
4. Creating the UCA
1) Select the Cylinder tool . 2) Select New Part.
3) In the Radius text box, enter 20, and then press Enter.
4) Click UCA_outer, then UCA_inner to create a Cylinder between the two points. 5) Rename the cylinder part, to UCA.
6) Select the Sphere tool . 7) Select Add to Part.
8) In the Radius text box, enter 25.
9) Click UCA, then UCA_outer to create a Sphere.
5. Creating the LCA
1) Select the Cylinder tool. 2) Select New Part.
3) In the Radius text box, enter 20, and then press Enter.
4) Click LCA_outer, then LCA_inner to create a Cylinder between the two points. 5) Rename the cylinder part, to LCA.
6) Select the Sphere tool . 7) Select Add to Part.
8) In the Radius text box, enter 25.
9) Click LCA, then LCA_outer to create a Sphere.
6. Creating the Pull_arm
1) Select the Cylinder tool . 2) Select New Part.
3) In the Radius text box, enter 15, and then press Enter.
4) Click Knuckle_inner, then Tie_rod_outer to create a Cylinder between the two points.
5) Rename the cylinder part, to Pull_arm.
7. Creating the Tie_rod
1) Select the Cylinder tool . 2) Select New Part.
3) In the Radius text box, enter 15, and then press Enter.
4) Click Tie_rod_outer, then Tie_rod_inner to create a Cylinder between the two points.
5) Rename the cylinder part, to Tie_rod. 6) Select the Sphere tool .
7) Select Add to Part.
8) In the Radius text box, enter 20.
9) Click Tie_rod, then Tie_rod_outer and Tie_rod_inner to create two Spheres.
8. Creating the Knuckle
1) Select the Cylinder tool . 2) Select New Part.
3) In the Radius text box, enter 20, and then press Enter.
4) Click Knuckle_outer, then Knuckle_inner to create a Cylinder between the two points.
5) Rename the cylinder part, to Knuckle.
9. Creating the Wheel
1) Select the Cylinder tool . 2) Select New Part.
3) In the Radius text box, enter 375, in the Length text box, enter 215.
4) Click Knuckle_outer, then Knuckle_inner to create a Cylinder between the two points.
5) Rename the cylinder part, to Wheel. 6) Select the Fillet tool
7) In the Radius text box, enter 50.
8) Click one side of the wheel, and then press right_mouse_button to finish. Repeat the other side of the wheel.
10. Creating the Test_Patch
1) Select the Point tool .
2) Select Add to Part and Don’t Attach.
3) Creating Design Points: POINT_1 (-350,-320,-200). 4) Select the Sphere tool .
5) Select New Part.
6) In the Length, Height, Depth text box, enter 500, 45, 400. 7) Click POINT_1, to create a Box.
8) Select the Cylinder tool . 9) Select Add to Part.
10) In the Radius text box, enter 30, in the Length text box, enter 350.
11) Click BOX: PART_1, and then click the CM of the box to create a Cylinder. 12) Rename the part, to Test_Pacth.
11. Creating the Spring
2) Select Add to Part and Don’t Attach.
3) Creating Design Points: Spring_lower (174.6, 347.85, 24.85). 4) Select the Point tool .
5) Select Add to Ground and Don’t Attach.
6) Creating Design Points: Spring_upper (174.6, 637.89, 24.85). 7) Select the Sphere tool .
8) In the K, C text box, enter 129.8, 6000.
9) Click Spring_lower and Spring_upper, to create a Spring.
12. Creating the Spherical Joint
1) Select the Spherical Joint tool .
2) Select the construction method 2 Bod - 1 Loc, and Normal To Grid.
3) Select the UCA and the Kingpin, and then click the point: UCA_outer, to create the construction joint between the UCA and the Kingpin.
4) Select the Spherical Joint tool again.
5) Place spherical joints at the following locations using the construction method 2 Bod -
1 Loc, and Normal To Grid:
Between the LCA and the Kingpin at LCA_outer. Between the Tie_rod and the Pull_arm at Tie_rod_outer. 6) Select the Spherical Joint tool again.
7) Select the construction method 1 Location, and Normal To Grid.
8) Click the point: Tie_rod_inner, to create the construction joint between the Tie_rod and the Ground.
13. Creating the Fixed Joint
1) Select the Fixed Joint tool .
2) Select the construction method 2 Bod - 1 Loc, and Normal To Grid.
3) Select the Pull_arm and the Kingpin, and then click the point: Knuckle_inner, to create the construction joint between the Pull_arm and the Kingpin.
4) Select the Fixed Joint tool again.
5) Place spherical joints at the following locations using the construction method 2 Bod -
1 Loc, and Normal To Grid:
Between the Knuckle and the Kingpin at Knuckle_inner. Between the Wheel and the Knuckle at Knuckle_inner.
14. Creating the Revolute Joint
1) Click Front_View tool . 2) Select the Revolute Joint tool .
4) Click the point: UCA_inner, to create the revolute joint.
5) Select Edit in the main menu: Click Modify. The modify dialog box appears. Click (Change Position). The move object dialog box appears. In the Rotate text box, enter 5, then click . Close the dialog.
6) Repeat 1)—3).
7) Click the point: LCA_inner, to create the revolute joint.
8) Select Edit in the main menu: Click Modify. The modify dialog box appears. Click (Change Position). The move object dialog box appears. In the Rotate text box, enter
10, then click . Close the dialog.
15. Creating the Translational Joint
1) Select the Translational Joint tool .
2) Select the construction method 1 Location and Pick Feature.
3) Select the Test_Patch.cm, to create the construction joint between the Test_Patch and the Ground.
16. Creating the Inplane Joint Primitive
1) Select the Inplane Joint Primitive tool .
2) Select the construction method 2 Bodies-1 Location and Pick Geometry Feature. 3) Select the Wheel and the Test_patch, and then click the point: Test_Patch.cm, to create the construction joint between the Test_Patch and the Ground.
17. Saving Your Database
File Save Datebase As.