×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

sacs

sacs

(OP)
Hello All,

I have civil engineering experience & recently switched to offshore (esp design of hull structures(lift boats))..
Can anyone guide me some material for lift boats design, I know that there are ABS, DNV guides. But Iam looking for some basic indetail material..

Also I started learning SACS, I couldnt understand the pupose of wish bone element. Can someone plz explain the concept..

Thanks

RE: sacs

I can help with the SACS question.

A wishbone element is a normal element that is preconfigured to provide restraint for lateral forces local to the element (local y and z axes). This is used to connect two elements together, allowing them to slide past one another.

A typical example - Riser in a guide support. Riser is allowed to expand vertically and free to rotate, but restrained laterally.

You need coincident joints to create a wishbone, and also a third joint along the line to be created. The program offsets one end from one coincident joint to the direction of the local (x) axis, and therefore the (y) and (z) axes for the restraint.

Treat is as a normal member otherwise, ie, flood and override the drag on the member as appropriate to avoid double dipping.
The SACS manual has more information on wishbones.

RE: sacs

(OP)
Thanks London!!

As I mentioned earlier Iam new to offshore field and also to SACS..

If we want to restrain or release members then why cant we use member release options (111000 or 000111). I tried searching SACS manual before asking for help but couldnt get much info in the manual. May be I didn't looked in the right place..

Can you please elaborate ...

Thanks

RE: sacs

No Problem!

Yes, you are right in asking if you can restrain or release members. In effect, this is what SACS does. The wishbone is a preconfigured element, with appropriate member releases and densities already applied. The same can be achieved by manually changing the element properties.

The manual is a little archaic in places, I agree.

Regards

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



News


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