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

Foundation load on fixed saddle

Foundation load on fixed saddle

Foundation load on fixed saddle

I have a horizontal vessel supported with saddles, one is fixed and the other is sliding saddle.
What should be foundation load values as per the zick analysis as per the uploaded fig?
I believe that the dead, hydrotest, operation values will be 1/2th of empty, hyrotest and operating weights.
The following are the zick analysis calc. The values what I have got is uploaded as per the ans
Saddle Reaction Force due to Wind Ft [Fwt], My ans-->(Fy, wind)
Saddle Reaction Force due to Wind Fl or Friction [Fwl] My ans--> (Fx, wind)
Saddle Reaction Force due to Earthquake Fl or Friction [Fsl] My ans-->(Fx, seismic)
Saddle Reaction Force due to Earthquake Ft [Fst] My ans--> (Fy, seismic)
But what will be the forces on Fz and moments on Mx and Mz
I believe that the force and moments act only on the 'x'.
Correct me if I'm wrong.
Thanks in advance

RE: Foundation load on fixed saddle

behanan, some general comments. First, you need to have good understanding of what your software is doing and what the output means.

Second, generally speaking, all the longitudinal loads (x in the figure) will be reacted at the fixed ssddle. Loads in the transverse and normal directions (z and y) may be reacted by one or both saddles, depending on the design and assumptions made in the software.

Third, the output may or may not be combining cases, for example Operation + Seismic + Wind. You need to know.

Fourth, you need to confirm if the various x, y, z outputs are reactions at the foundations, or are internal to the vessel.

Perhaps others can expand on this.



The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: Foundation load on fixed saddle

Because our projects are driven by piping layouts. We will model vessels in the pipe stress model. This provides all the loads (Vessel + piping) at the vessel supports and anchors.

RE: Foundation load on fixed saddle

Giving a note of advice is fair rather than taunt someone with unreasonable usage of phrases. I would not like to expand beyond.

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


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. 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