Cable On-Bottom Stability
Cable On-Bottom Stability
(OP)
Guys,
I was involved in a on-bottom stability evaluation of a subsea cable using common recommended approach of DNV-RP-E305.
While I found the cable unstable based on this RP, I realized that some people evaluate Cable stability with a very simple method, ignoring Wave action. this approach results in less required stability and so on
1- Is thereany difference between stability evaluation of Pipes and cables?
2- Is DNV-RP-E305 (or new F109) applicable for cables?
I was involved in a on-bottom stability evaluation of a subsea cable using common recommended approach of DNV-RP-E305.
While I found the cable unstable based on this RP, I realized that some people evaluate Cable stability with a very simple method, ignoring Wave action. this approach results in less required stability and so on
1- Is thereany difference between stability evaluation of Pipes and cables?
2- Is DNV-RP-E305 (or new F109) applicable for cables?





RE: Cable On-Bottom Stability
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"The problem isn't working out the equation,
its finding the answer to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Cable On-Bottom Stability
I think 1/2 wavelength is correct. but it will be applied to both pipeline and cable or any other structure.
I mean no matter the case is pipe or cable, the method seems to be the same.
in addition, my case is in shallow water (less than 50m). Interesting is that there are some other cables in the region which has been installed before and they would be evaluated unstable using E305 approach.
RE: Cable On-Bottom Stability
I can't imagine much difference between the analysis of each, except for the increased flexibiity of the cable, so certainly many concepts from F109 could be applicable.
**********************
"The problem isn't working out the equation,
its finding the answer to the real question." BigInch
http://virtualpipeline.spaces.live.com/