Advanced Coupled Finite Element & Structural Reliability Analysis and Design Software for Subsea Pipelines
Subsea Software develop advanced coupled finite element (FE) and structural reliability analysis (SRA) codified design software for subsea pipelines.
Finite Element Analysis
Subsea Software calculations are verified against general purpose and bespoke subsea finite element software and NAFEMS bench marks.
Subsea Software programs are validated against first principles, published examples and analytical techniques.
The Subsea Software element library includes bar, cable, beam, pipe, soil-structure and rigid elements.
For pipeline analyses the non-linear pipe elements are suitable for straight (2 nodes) and curved (3 and/or 4 nodes) pipelines. They include formulations for ovalisation and radial swelling/contraction. To conform with high temperature high pressure (HTHP) environments pipe elements include wall thickness shear deformation in all calculations. Pipeline elements are easily interfaced with the non-linear gap soil-structure elements.
Structural Reliability Analysis
Prediction of the reliability of structures using SRA methods are performed using the Monte Carlo Simulation (MCS) or Latin Hypercube Simulation (LHS).
Although the finite element solver is fast in order to achieve a specified accurracy the MCS or LHS methods both require at a minimum several hundred thousand, usually time consuming, finite element (FE) analyses to be performed. To achieve fast run times both the MCS and LHS methods can be run in a reasonable time using Subsea Software spawning functionality; i.e. copying to and running the Subsea Software SRA FE processor in parallel on several cloud based virtual machines.
All products within the Subsea Software suite are easy to use, intuitive, code of practise specific and robust.
Structural analyses are performed using our bespoke subsea pipeline finite element solver, structural reliability is achieved by integrating the statistics program R into our program architecture whilst codified design is achieved using predefined but editable design code templates.
The architecture of the suite ensures that all models are design centric hence optimising the time to produce a design. The Subsea Software program architecture allows the engineer to design to the code of practise whilst making the relevant SRA and FE functionality available as required.
The Windows interface uses the attribute Define & Assign methodology together with entity associativity so that any model can be easily transformed to another simple or complex model. This increases engineering productivity, modularises all designs and makes the analysis and design process less prone to error.
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