This document, along with 'Friction Effects and Shear Stiffness', discusses the application of Coulomb friction from a physical and mathematical perspective. These notes supplement the OrcaFlex documentation.
This document discusses dynamic compression in catenary lines and associated high frequency curvature response. The note explains how to determine whether the response is physical or numerical, and offers suggestions on how to reduce possible over-conservatism in the model or load case matrix.
Guidance on how to use a spar buoy connected to a vessel to model a buoy, so that frequency-dependent added mass & damping (and other vessel facilities, such as 2nd order wave load if wanted) can be used.
This document explains how the old line target damping on the general data form in OrcaFlex (now on the numerical damping page of that form) relates to the effective % critical damping as normally understood by engineers.
This document describes: (1) the units used in OrcaFlex for linear seabed stiffness, and how these relate to the more common units of force per unit penetration per unit length of line. (2) a way of setting a reasonable value for seabed stiffness.
This document summarises how OrcaFlex can be used in support of the analysis methodology outlined in BV guidance note NI 604 DT R00 E (Fatigue of Top Chain of Mooring Lines due to In-plane and Out-of-plane Bendings).