Hydrodynamic effects may occur because the structure moves in a motionless fluid, the structure is fixed but there is fluid motion, or both the structure and fluid are moving. The fluid motion consists of two parts: current and wave motions. The current is input by giving the current velocity and direction (input as W(i) and θ(i)) at up to eight different vertical stations (input as Z(i)). (All input quantities referred to in this section not otherwise identified come from the TBDATA commands used with TB,WATER). The velocity and direction are interpolated linearly between stations. The current is assumed to flow horizontally only.

The information in this section applies to the archived PIPE59 element.