V3.3 Highlights - Enhanced Modelling Features

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V3.3 Highlights - Enhanced Modelling Features

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A new Tapered Stress Joint component is available to model conical or tapered joints along a pipeline. Such a component is particularly useful for in-line structure scenarios where tapers are used to minimise stress/strain concentrations either side of a structure. The dimensions and diameters of the taper are fully controllable by the user. The taper can also utilise linear and non-linear stress-strain material types.

tsj_comp

 

tsj_animation

 

The Moment of Inertia for Pipe Section components can be manually overwritten allowing users to arbitrarily adjust the bending stiffness of the pipe without changing its physical diameters. This feature is compatible with all linear and non-linear material types and it only influences pipe stiffness with stress/strain post-processing still using the actual pipe diameters. Users may wish to use this feature to calibrate their pipe section stiffness to account for coatings etc.

moment_of_inertia

 

The Infill Material Density at the cut back of external coatings can be specified on the Pipe Section component and the corresponding section weight values are then adjusted accordingly. This allows for capturing the overall weight of a coated pipe joint in more detail.

infill_density

 

An option is provided for selecting whether buoyancy diameters or drag diameters are used for the calculation of inertia and added mass terms in Morison’s equation for hydrodynamic loading. This option can be controlled via the Project component. For pipe sections both diameters are typically very similar, however for stinger sections and structures there can be noticeable differences between the diameters, in which case what diameter actually gets used in Morison’s equation is important. Note that on a strict theoretical level the buoyancy diameter is the more appropriate for Morison’s equation.

It is possible to introduce non-linear stiffness properties to the static analysis solution before quasi-static analysis steps are performed. This is beneficial for certain floating stinger models where the flex joints for modelling the stinger hinges have non-linear moment-angle curves that are intended to apply a pre-load moment to the stinger. Again, this feature is controllable on the Project component.

new_project_options