Statically, there was again near-perfect agreement: For Case A, layback differed by less than 0.01%, bottom tension differed by less than 0.2% and stinger tip separation differed by less than 1.1%. Once these differences were accounted for, then the results (eg., graphs on right) were in near-perfect agreement. Subtle differences in the calculation of von Mises strain. Slight differences in the specification of non-linear moment-curvature data. High frequency damping - OrcaFlex fully and correctly captures stress waves travelling along the pipe (from eg., intermittent pipe-roller contact). Eventually these differences were found to be caused by:Ĭorrect tensioner placement in OrcaFlex (on the barge at pipe start) correctly allows minor pipe movement over rollers, slightly flattening peaks in results.ĭynamic results presentation - OFFPIPE results equate to a mix of OrcaFlex minimum and maximum range graph results. Initially differences in results were found. The OrcaFlex analysis used 10 elements between supports.įor Case A (700m water depth), OFFPIPE used its default of 1 element between supports.įor Case B (150m water depth), OFFPIPE used 16 elements between supports.
Published Jan-17, applies to OrcaFlex v9.8+ 3 There are two approaches:īoth are distributed as part of our standard examples. Standard automation facilities built-in with OrcaFlex mean that Lay tables are easily generated.
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The usual OrcaFlex presentation of graphs and values now include results from pipelay code checks.
Placing Supports on the barge / stinger is then very easy.Ĭode checks have been in OrcaFlex since v9.7(Sept-13) and are easily the simplest way to perform standard industry code checks. Its now trivial to specify the roller box (Supports), and Regarded as class-leading, and now it just got better with some new UI to facilitate easy pipelay model building. Supports UI - ideal for Pipelay The OrcaFlex UI has always been
Published Jan-17, applies to OrcaFlex v9.8+ 2 So migrate your pipelay applications to OrcaFlex using Orcinas best-in-class technical support service! Non-linear bend stiffness (with or without hysteresis)Įxcellent agreement between OrcaFlex and OFFPIPE*Įquivalent lines, explicit pipe-in-pipe and / or piggybacks Lay table* (as a spreadsheet or with Python)īuilt-in code checks* (API RP 1111, DNV OS F101 & PD 8010)Ĭontact robustly handled (ideal for intermittent pipe-support contact)
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O Pipelay in OrcaFlex Robust, clear and intuitive Professional Software for Professional Engineersįully interactive UI (ideal for visualisation and checking) Published Jan-17, applies to OrcaFlex v9.8+ 1
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