The other line in the relationship is the penetrating line.
This spline curve allows OrcaFlex to represent the line as a smooth cylinder for the purposes of contact modelling. One of those lines is the splined line, which has a smooth spline curve fitted between the line nodes. The line contact model is, essentially, a relationship between two distinct lines in an OrcaFlex model. Line clashing, however, automatically accounts for contact between different segments of the same line. Line contact can not directly model contact of one part of a line with another part of the same line – to do so, you must model the real continuous line with two (or more) individual lines joined together to allow for contact between the two parts.Line contact is included in both static and dynamic analysis, whereas line clashing is only active in the dynamic analysis.
Under the line clashing model, a line can pass through another without contact only if the segments move a whole diameter or farther in a single time step. (This is be avoided by using short segments or extra penetrators on the penetrating line) The problem does not arise with the line clashing model, since the whole of each clash-checked segment, rather than a discrete set of points along its length, is checked for contact with all other clash-checked segments. This can occur if the nodes or penetrators on the penetrating line are more widely spaced than the outside diameter of the splined line: the solid cylinder of the splined line may then pass between the penetrators on the penetrating line without making any contact.
Line contact models point-surface contact, with localised penetrators placed at the nodes (or at other points) on one of the two lines (referred to as the penetrating line).The line contact and line clashing models have different features: to help you judge which might be most suitable for your application, here are the main differences, advantages and disadvantages. OrcaFlex also has another way of modelling contact between lines, called line clashing. One line strikes the outer surface of another, as seen in riser interference cases.