| Applies To | |||
| Product(s): | AutoPIPE | ||
| Version(s): | 2004, XM, V8i, CONNECT; | ||
| Area: | Modeling | ||
| Original Author: | Bentley Technical Support Group | ||
| Date Logged & Current Version | May. 2016 10.01.00.09 |
Problem:
Can you suggest a modeling approach for the following valve + actuator where the supplier only provides info on the combined unit weight and CG but no individual component (valve weight, actuator weight, etc..) details?
Solution:
Using one of the following techniques:
Option #1:
a. Insert a valve with the proper end connections and length.
b. Set "Valve Weight" = 0.00
c. Disable (uncheck) "Actuator Auto"
d. Enable (check on) "Symbol"
e. Calculate value for combined weight of (valve + actuator) and enter into Actuator Weight field
f. Find measurement of offset from center of valve to the CG of the (valve+actuator). Enter respective values into Actuator Dx, Dy, and Dz fields.
g. Press OK to insert valve
Option #2:
a. Insert a valve with the proper end connections and length.
b. Set valve weight as specified by manufacture
c. Disable (unchecked) "Actuator Auto"
d. Disable (unchecked) "Symbol"
e. Enter 0.00 for Actuator weight and Dx,Dy, & Dz settings
f. Press Ok to insert valve
g. Insert Beam Section Properties,
Note, Some may feel that the connection between the valve's body and actuator can be assumed to be rigid while others feel that it is not rigid or somewhat flexible.
Crate new Beam Section Properties to connect between valve's body and actuator
h. Make node at center of valve the current node point.
i. Insert Beam from center of valve to location of actuator using new Beam Section Property created above
j. Insert Weight at end on beam to represent the actuator weight.
Option #3:
Model the valve and then add additional beams and rigid piping as necessary to correctly model the actuator. Take note when applying pipe and rigid properties to correctly account for weight and thermal movement as needed.