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Model components list

A wide range of built-in model components is available within the user interface to help you setting your model. Model components include structural components such as lines which are used to model risers, pipelines or mooring systems, non-deformable components used to model solid bodies such as floaters, buoys and rigid shapes, and environmental loadings including waves, currents and winds. This section details all the model components that may setup using the user interface.

  • Sea and ground The Sea and ground component defines global characteristics of the model such as seawater density and seabed shape. Unlike the other model components, the sea and ground component is unique and cannot be removed from your model.

  • Lines Lines components include Generic lines (i.e. standard line types), drilling risers, bonded hoses and winch lines.

  • Floaters Floaters components are used to setup platforms or vessels to which other model component may connect. Floaters components come with different built-in shapes with specific drawing in the 3D View window.

  • MultiStructures floater : Specific floater modelled by flexible beam element and a mixed potential/Morison formulation

  • Buoys Buoys model components are non-deformable components that can be used to setup solid structures subject to various loads such as buoyancy force, drag, lift and inertia forces.

  • Rigid bodies Rigid bodies components are non-deformable components that can be used to setup solid structures in the model. These components may serve to link other model components with each other and may be subject to external loadings. Available shapes for rigid body components include assembly of bar elements and surface elements. These elements may further be used to model contact with lines.

  • Arches Arch components are non-deformable components that can be used to model mid-water arches systems for flexible risers adopting a lazy-S configuration.

  • Equipments Equipments components are custom model components that can be used to model drilling riser equipment devices such as lower marine riser package, blow out preventer, wellhead or X-mas tree.

  • BOP Stack BOP stack components are custom model components that can be used to model blow out preventer stack that come with flexible service lines (e.g. kill and choke lines).

  • Tensioners Tensioner components are custom components used to model tensioning system that come with drilling risers.

  • Ballasts Ballast components are used to model the effects of liquid ballast attached to any solid structure such as floaters or rigid bodies. The filling ratio may be controlled as function of time or quasi-static load step.

  • Springs Springs components may be used to link two model components through a force. The no-load length and the stiffness may be specified.

  • Flexjoints Flexjoint components may be used to link two model components through a moment load, and are naturally used to represent flexible joints in rigid riser systems.

  • Load Excursion Links Load Excursion Links are simple components linking two nodes from the global model through tension and horizontal tension components which depends on the relative position between the nodes. Load Excursion Links may be used to model simplified mooring lines components based on load excursion curves data.

  • Pulleys Pulley components are a special kind of components linking device which feature 3 connection nodes. These components allow deviating tensile loads and have application mostly with installation analysis.

  • Telescopic joints Telescopic joint components are custom components that are used with drilling risers. These components are linked with the drill ship and the tensionner and include an inner barrel and an outer barrel which interact through contact loads.

  • Horizontal Axis Wind Turbines HAWT components are used to model horizontal axis wind turbines. They can be set-up on fixed or floating sub-structure. Horizontal Axis Wind Turbines are represented by Lines and Rigid Bodies connected together. In the Model Browser a HAWT component contains all the sub-components it is made of.

  • Waves Wave components are used to define individual regular and irregular wave data.

  • Waves sets Wave sets components are used to define series of regular and irregular wave data. Wave sets enable creating series of dynamic analyses grouped in an Analysis Set and can be used to derive results RAO (e.g. motion RAO, stress RAO or tension RAO).

  • Currents Current components are used to define current profiles data.

  • Winds Wind components are used to define wind data. Wind may be defined either through a wind spectrum or a time-history.

  • Prescribed loadings Prescribed loading components are used to apply external loadings to other model components. Available external loading types comprise constant loads, incremental point loads, time-varying point loads, point inertia, point lump masses.

  • Prescribed ed displacement Prescribed displacement components are used to apply controlled motion to other model components. Available prescribed displacement types comprise incremental displacement, sine-like harmonic displacement, specified velocities, time-varying displacements along 6 degrees of freedom, and changes in boundary conditions (e.g. disconnection or connection).

  • Environments sets Environment sets components are used to define series of environmental loadings including wave data, current data, wind data, floater excursion data, floater motion data, imposed loadings and imposed displacements. This model component allows simple setup of load case matrices. Environment sets enable creating series of dynamic analyses grouped in an Analysis Set.

  • User defined keywords The User defined keyword object allows the user to add solver keywords to the solver LOG input file. Adding directly solver keywords is useful when these keywords have no dedicated GUI (cannot be called in the interface) or when these keywords are to be defined in a more generic way.

  • Joints The Joint is used to automatically generate rigid bodies associated with tubular intersections and can be subjected to code checks computations.