Hi PipelineEngr,
My analysis is run using Irregular Wave (ISSC).
My Stress Range should be come from half cycle now.
So my implementation should change to the following:
SJones,
If that so, I guess my previous method is correct.
1. Stress Range = From Analysis Output
2. Duration for every...
SJones,
If that so, I guess my previous method is correct.
1. Stress Range = From Analysis Output
2. Duration for every cycle = From Analysis, taken as duration between the extreme stress occurrence.
3. Allowable Fatigue Cycle for Installation = 10% * Fatigue Cycle (from S-N Cycle at analysis...
Hi SJones,
I do agreed with you.
However I has been witness that in Installation Phase, it is becoming a norm on translating the Allowable Cycle into Allowable Duration which make me wonder if the approach is correct. Hence why I have say didn't have a full grasp on this subject.
Further more...
SJones,
Thanks for the reference.
However I cant related the practicality of the fatigue calculation to the installation.
Thus why I write this thread.
Could you simplify for me?
Now that I already able to calculate the Life Cycle, N.
This Life cycle is calculated by the Stress Range which is...
Hi,
I been running analysis for pipelay.
Nowdays Fatigue calculation has become a norm in the industry.
However I still cant grasp the fundamental.
In installation phase, we look into fatigue analysis so we can determine the allowable lay duration for each pipe length or pipe weld.
Sometime...
