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Fix Redundant Constraints With Revolute, Spherical, and Hooke Joint. GUI Familiarity Level Required: Higher Estimated Time Required: 10 minutes. MSC.ADAMS 2005 r2. Topics Covered. In this tutorial you will learn how to:. Import .cmd file Add spherical joint Add hooke joint
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Fix Redundant Constraints With Revolute, Spherical, and Hooke Joint. GUI Familiarity Level Required: Higher Estimated Time Required: 10 minutes MSC.ADAMS 2005 r2
Topics Covered In this tutorial you will learn how to: • Import .cmd file • Add spherical joint • Add hooke joint • Fix redundant constraints You will need to download the file “4-bar_redundant_constraint.cmd“ to begin this tutorial If you have any difficulties, import the “4-bar_redundant_constraint_complete.cmd” file and proceed from pg 8
Fix Redundant Constraints Problem As the model is defined, there are 3 redundant restraints. The use of different types of joints yield a model with 0 DOF which allows for kinematics simulation while avoiding redundant constraints, which is good modeling practice.
What You Should Accomplish If you are successful you should end up with a working ADAMS model that has no redundant constraints.
Importing a command file (.cmd) • Select Import a file radio button • Click OK a b • File Import window will open • Right-click File To Read text field, select Browse • Locate saved file 4-bar_redundant_constraint • Click Open • Click OK d c e f
Add Spherical Joint • Right-click on JOINT_2, select Joint: JOINT_2, select Delete a • Right-click Joint tool stack. Select Spherical joint • Set Construction text fields to 1 Location and Normal To Grid • Click PART_2.MARKER_2 d b c
Add Hooke Joint • Delete JOINT_3 • Right-click Joint tool stack. Select Spherical joint • Set Construction text fields to 1Location and Normal To Grid • Click PART_3.MARKER_4 • Click on the cm (center of mass) of Part_2 • Click on the cm of PART_3 b d e f c
Verify Verify your model. There should be 0 Degrees of Freedom and no redundant constraints
Model This is what your screen should look like when your model is complete
Topics Covered In this tutorial, you learned how to: • Import .cmd file • Add spherical joint • Add hooke joint • Fix redundant constraints
Best Practices • Check orientation of spherical joint • Check orientation of hooke joint, it should be along the cm of the two parts. • Remove unnecessary joints • Verify your model.