×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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!
*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

unpredicted joint force behaviour

thread823-398841

unpredicted joint force behaviour

unpredicted joint force behaviour

(OP)
Hello !

I have modeled a completely symmetric lift table (), but when i simulate, I have interesting situation where there are joint forces only on the joints which are on left side of table (A, B, C and D) (), whereas corresponding joints on the other side deliver zero. what causes this strange behavior ? I am attaching the *.cmd file if you wish to have an eye upon...


greetings ;)

RE: unpredicted joint force behaviour

I suspect that if you check the run time messages from the solver it says something like 'Read this carefully. Over constrained joints in model. The following degrees of freedom have been released...'

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

RE: unpredicted joint force behaviour

(OP)
indeed, but how can i have forces on each joint then


p.s. sorry - im new to MBD analysis...

RE: unpredicted joint force behaviour

(OP)
Im self - educating :( Reading some books and thats all - if you can guide me to good videotutorials / books i will be grateful !!!

RE: unpredicted joint force behaviour

(OP)
...and once again - i want to monitor joint forces on both sides - if i add one more joint, im overconstrainting it - what should i do ?!

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! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close