cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Showing results for 
Search instead for 
Did you mean: 

We are happy to announce the new Windchill Customization board! Learn more.

Windchill Fault Tree Analysis questions...

ptc-4522961
1-Newbie

Windchill Fault Tree Analysis questions...

Trying to complete a fault tree so I am evaluating the 30 day trail and already have some questions...

1. What unit is frequency in? failures/hour?

2. What is an appropriate amount of time to run the simulation? What effect does this have on the calculated frequnecy?

Thanks!

1 ACCEPTED SOLUTION

Accepted Solutions

Here is a quote from "Windchill Quality Solutions Getting Started Guide" (you can find this guide (in PDF format) in the attachment):

"Frequency - The frequency of failures over a time period".

When this checkbox is selected for calculation, failure frequency is calculated. The frequency value shown on the gate isnaffected by the failure rate multiplier. The failure rate multiplier is specified in Failure Rate Multiplier under General in the System file properties.

P.S. Video tutorial "Customizing the Look of Gates and Events in Relex Fault Tree":

http://media-dl.ptc.com/mkt/dl/customizing-the-look-of-gates-and-events-in-relex-fault-tree.mov

http://media-dl.ptc.com/mkt/dl/customizing-the-look-of-gates-and-events-in-relex-fault-tree.wmv

View solution in original post

3 REPLIES 3

You mean frequency on "Results Display Page" ("FTA Results")?

Yes, from what I could tell the frequency is the number of failures in the time period you have specified to run the simulation over... Is this correct? So if I were to run the simulation for 1 hour (I assume the time units are hours? is that correct?) the frequency would be the failures per hour? The values I am getting do not agree with my hand calculations for failures per hour...

Thanks

Here is a quote from "Windchill Quality Solutions Getting Started Guide" (you can find this guide (in PDF format) in the attachment):

"Frequency - The frequency of failures over a time period".

When this checkbox is selected for calculation, failure frequency is calculated. The frequency value shown on the gate isnaffected by the failure rate multiplier. The failure rate multiplier is specified in Failure Rate Multiplier under General in the System file properties.

P.S. Video tutorial "Customizing the Look of Gates and Events in Relex Fault Tree":

http://media-dl.ptc.com/mkt/dl/customizing-the-look-of-gates-and-events-in-relex-fault-tree.mov

http://media-dl.ptc.com/mkt/dl/customizing-the-look-of-gates-and-events-in-relex-fault-tree.wmv

Top Tags