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Geometric Properties in Rigid Riser Format

Overview

When using the Rigid Riser format you specify geometric property data under five headings:

•Structural properties: there are three material models available, Linear Elastic, Non-linear Elastic, and Linear Elastic with Plastic Hardening.

•Diameter Inputs: there are four external diameter inputs and one internal diameter input

•Mass density

•Cross-section properties

•Buoyancy Formulations: the options are Default and Distributed

All of these are discussed in more detail in the proceeding sections.

Relevant Keywords

•*GEOMETRIC SETS is used to assign geometric properties to element sets (see OPTION=RIGID).

•*STRESS/STRAIN DIRECT is used to define stress-strain curves for non-linear materials.

If you would like to see an example of how structural properties are defined in the Rigid Riser format, refer to A01 - Deepwater Drilling Riser.