2D Profile

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2D Profile

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In the context of rigid seabed contact, the profile of the arbitrary 2D surface varies in the global XY plane and is constant in the global Z direction (see figure below). The profile is defined by a series of pairs of values, and this is the data that is contained in the ASCII data file. Each line in the file defines a point on the profile and contains data in the format Y-coordinate, Seabed Elevation. Here Y-coordinate is self-explanatory, and Seabed Elevation is the height of the seabed at this point above the datum X=0. Linear interpolation is used to determine the surface profile between user-specified points, while outside the range of points the surface is assumed to be flat and horizontal.

Profile_Definition of Arbitrary Seabed Profile

Definition of Arbitrary Seabed Profile

Two data values are necessary to define the profile shown in the above figure, namely the values for Points (1) and (2). The arbitrary surface file for this example would look like this:

100, 30

0, 0

The first line of data defines Point (1) and the second line defines point (2). Point 1 is a distance of 100 (units) along the positive Y-axis, and the seabed at that point is 30 units above X=0. The seabed slopes uniformly from Point (1) to Point (2). Elsewhere the seabed is flat.