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Line types: Contact data |
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Line types: Contact data |
Contact between lines and the seabed, elastic solids or clashing with other lines takes full account of the diameter of the line: this value gives the diameter to be used in these contact calculations. If the value is '~', then the value given for the line outer diameter is used.
Contact diameter is also used in the calculation of line contact clearance results and as the drawing diameter for shaded graphics views.
| Note: | For contact between lines and the seabed or elastic solids, contact is modelled between a node and the contact surface. For a node at a line section boundary, we choose the contact diameter to be the larger of the contact diameters of the line types either side of the node. For line-to-line contact, the contact is between pairs of segments: since each segment has a single well-defined line type, there is no ambiguity over contact diameter. |
The inside or around types of line contact both represent the placement of one line within another. For this contact model, an inner contact diameter is therefore required to describe the bore of the outermost line in the contact relationship. If the value is '~', then the value given for the line inner diameter is used.
At a line section boundary, for a node of the penetrating line in a line contact relationship, we choose the inner contact diameter to be the smaller of the contact diameters of the line types either side of the node.
| Note: | Although the contact diameters cannot be directly specified for homogeneous pipe category line types, both the inner and outer contact diameter presented for these line types will account for any coatings or linings applied to the homogeneous pipe line type. |
The stiffness and damping values used by the clashing algorithm. Damping is only included when using the explicit integration scheme.