Dynamic simulations of trawl gear impact with SAGE Profile

SAGE Profile has been designed to assist the pipeline engineer during the entire lifecycle of an offshore pipeline. The software suite has been certified by Bureau Veritas for static applications like on-bottom stress analysis, out-of-straightness analysis, span assessment,… In a paper, recently presented at the 6th Pipeline Technology Conference, the use of SAGE Profile to simulate dynamic events like trawl gear interference was demonstrated.

Trawl gear

In the paper, numerical models are presented to simulate the displacements and corresponding stresses during trawl gear pull-over. The finite element analyses are compared with simplified analytical approaches and results published in DNV-RP-F111. The results indicate that SAGE Profile can indeed predict the transient dynamic response of subsea pipelines subjected to trawl gear pull-over loading – provided the damping factors are judiciously chosen.

Based on these observations, we shall submit SAGE Profile for full dynamic certification and the development team is keen on introducing trawl gear interference (as per DNV-RP-F111) as a new load pattern in forthcoming versions of SAGE Profile.

PDF >> Read more – 2013