×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

UG Simulation_applying Vector Force

UG Simulation_applying Vector Force

UG Simulation_applying Vector Force

(OP)
HI,
I am trying to apply vector force(unit force) at one end of the simulated 4-barlink  mechanism. I used Revolute+Revolute+Universal and Ball joints at each end.
Grubler count is shwoing 0 and the dof also zero (with driver on one of the revolute joints).
Now when I apply unit vector force, when I run the for excel map the simulation is giving a torque of 0.9psi where as the FBD free body diagram gives an end torque of 8.63psi
.
Pl guide.
Thanks
Srini

RE: UG Simulation_applying Vector Force

Torque measured in pounds per square inch? Something sounds wrong here...

RE: UG Simulation_applying Vector Force

(OP)
Oops,my mistake: Lb-in

HI,
I am trying to apply vector force(unit force) at one end of the simulated 4-barlink  mechanism. I used Revolute+Revolute+Universal and Ball joints at each end.
Grubler count is shwoing 0 and the dof also zero (with driver on one of the revolute joints).
Now when I apply unit vector force, when I run the for excel map the simulation is giving a torque of 0.9Lb-in where as the FBD free body diagram gives an end torque of 8.63Lb-in.
Pl guide.
Thanks
Srini  

RE: UG Simulation_applying Vector Force

Can you post a sketch of your mechanism?

RE: UG Simulation_applying Vector Force

Ignoring friction, and in the position shown in your sketch, I get 9.2 in lb torque in joint C.

You refer to the ground joint as the 'driver'; are you applying any force to this joint, or only the unit force at the end of link 1? Are you simulating a range of motion or just this one position?

RE: UG Simulation_applying Vector Force

(OP)
I am applying force at the end of link1: Aerodynamic engineering Links and simulating a rnage of motion. for ex: from displacement -10 to +10 with a velocity of 1.
 

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources