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Lateral buckling analysis f offshore pipelines using SIMLA, MARINTEK and Chevron Energy Technology Company extend the limits of ultra-deepwater model testing. Scale model testing - a crucial element in development of a novel hull form. Offshore pipelines are required to operate at ever higher temperatures and pressures. The resulting high axial stress in the pipe-wall may lead to unexpected buckling, which may have serious consequences for the integrity of the pipeline if this is not taken into account during the design phase. The computer analysis tool, SIMLA, which has been developed by MARINTEK for Norsk Hydro, can accurately predict and simulate buckling effects. SIMLA includes special-purpose tailor-made nonlinear finite elements, contact algorithms, material models and numerical procedures for advanced structural analysis of offshore pipelines. SIMLA does this in sequential steps or load cases: In the first step, the pipeline is automatically placed along the predefined route. This is handled automatically by the AUTOSTART feature in SIMLA. The correct stresses resulting from the route description, seabed, hydrostatic loads and gravity effects are calculated with minimum input from the user. MARINTEK and Chevron Energy Technology Company extend the limits of ultra-deepwater model testing. The idea of creating a floating unit capable of being moored in a fixed orientation even in the harshest environments was the driving force behind Sevan Marine’s development of a cylindrical hull. Technical condition of shutdown valves in the offshore industry. A growing amount of attention is being paid to designing offshore installations to withstand impacts in extreme weather. Impact and slamming loads imposed on platform decks and bow structures by heavy waves are of particular interest.
Tags : energy technology company, sevan marine, platform decks, offshore pipelines, gravity effects, material models, autostart feature, norsk hydro, extreme weather, marintek, finite elements, numerical procedures, minimum input, pipe wall, offshore installations
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