18. How to apply a flexible joint's design movements into AutoPIPE?


Applies To
Product(s):AutoPIPE
Version(s):ALL;
Area: Modeling
Date Logged
& Current Version
June 2022
12.08.00.063

Problem:

How to apply a flexible joint's design movements into AutoPIPE?

The flexible joint manufacture should provide a design calculation report for the joint being specified for your project (see example report below).

The report should include a section detailing the limits of movement that a particular assembly can handle. 

How are these design movements applied in AutoPIPE?

Solution:

First what type of expansion joint are being modeled in AutoPIPE? Single Bellows Expansion Joint, Tied Universal Expansion Joint, Ball and Socket Joint, etc..

In most cases these design movements are not a point after being reached there is a hard stop. Typically these values represent the movement the joint is designed to handle, however the joint is not restrained and can move more. Movement beyond these values could lead to assembly failure.

Suggested steps:

1. See AutoPIPE help for modeling approaches to the most popular types of Flexible joints.

2. Afterwards, complete the rest of the model and analyze the model.

3. Review the displacements of the Flexible joint end points.

4. Calculate the delta difference across the flexible joint. The delta movement should be less than that mentioned in the design calculation's report.   

note: a new feature has been logged to generate a flexible joint report (728429) making it easier for users to evaluate model displacement across the joint. This will be added into a future version of the program.  

See Also

Flexible Joint - Modeling Approaches, Tips, Techniques

Bentley AutoPIPE