CAESAR II force-time history data can now be extracted from a Flowmaster transient analysis using IOCS’ FM2C2 product. This simple to use stand-alone program takes pressure-time data from a Flowmaster analysis and outputs the force-time (.frc) file needed by CAESAR II for a dynamic pipe stress computation.

There is a growing requirement for pipe stress engineers to have good data when transient stress situations are studied. These scenarios include pumps starting or tripping, valves rapidly closing and automatic couplings breaking apart. Process safety is paramount and a full understanding of the pipe stresses in such events is necessary to be certain a transient surge will not cause unacceptable stress levels in the piping or on the restraints.

To use FM2C2 the Flowmaster user first builds the fluid network in the usual manner. When there is confidence in the results from a water-hammer or similar simulation, FM2C2 can be used to read the Flowmaster results directly from the results stored in the Flowmaster database. The user simply supplies node numbers and diameters through a friendly GUI. To check correct execution the force-time histories can be displayed. Histories from multiple nodes can all be read at the same time.

FM2C2 can be used to capture data from any number nodes in the Flowmaster network and for any period of time. FM2C2 may be used with incompressible (liquid) or compressible (gas) networks.

• An interface tool use to link Flowmaster and CAESAR II data together.
• FM2C2 takes the transient simulation results (Pressure vs. Time History Profile) from Flowmaster and calculates a Force vs. Time History Profile through engineering calculation.
• FM2C2 produces an output file (*.frc file) which consists of the Force vs. Time History Data.
• Then the FRC file will be used by CAESAR II to create Force Spectrum Files for dynamic analysis.
  

Example - SNFAIL

Example – SNFAIL Flowmaster Compressible Transient

FM2C2 Calculate Force-Time History

Why FM2C2?

• A Flowmaster transient analysis can predict a surge pressure profile.
• There are typically too many data points from a time history analysis for a user to manually input the data into CAESAR II.
• FM2C2 is used to bridge the gap between a Flowmaster transient simulation and a CAESAR II dynamic analysis.
• It allows the pipe stress engineer access to more comprehensive data describing a pressure surge.