Flexcom > Data Inputs > $MODEL

Purpose

To apply coatings on the basis of element set.

Theory

Refer to Coatings for further information on this feature.

Keyword Format

A block of lines which defines a coating, repeated as often as necessary.

SET=Element Set

TYPE=Type

NAME=Name, THICKNESS=Thickness, DENSITY=Mass Density

Notes: Type may be either INTERNAL or EXTERNAL. The third line may be repeated to assign multiple coatings in succession. Coatings are assumed to occur in order from the base section – i.e. inwards in the case of internal coatings, and outwards for external coatings. The second line may be repeated to switch between internal and external coatings for a particular element set.

Table Input

Input:	Description
Set Name:	The element set to which the coatings are assigned. This defaults to All, to indicate all elements.
Type:	This option allows you to select whether the coatings are Internal or External (the default).
Name:	The name of the coating, for example, “Concrete”.
Thickness:	The thickness of the coating.
Mass Density:	The mass density of the coating

Notes

(a)The option to specify coatings is independent of the geometric format option used to define the base element set. Flexcom assumes that the coatings occur in order from the base section, which means inwards in the case of internal coatings, and outwards for external coatings.

(b)The application of coatings causes an increase in mass per unit length, while the stiffness properties remain unchanged.

(c)The various diameters (drag, buoyancy, external, contact and internal) are adjusted as appropriate. Specifically, the internal diameter is reduced where one or more internal coatings are present, and the external diameter is increased if one or more external coatings are present. The remaining diameters (drag, buoyancy and contact) are only adjusted where the relevant user-specified value is exceeded by the external diameter plus any external coatings. It is important to note that the diameters used for stress computations are unaffected by the presence of coatings, and the values specified for the base section take priority.