Theory and References

The theory behind MoorPy is in the process of being written up and published. Please check back later or contact us if in need of a specific clarification.

Points

Points in MoorPy, like MoorDyn, are treated as point masses (3 degrees of freedom) with point-mass, buoyancy, and omnidirectional hydrodynamic properties.

However, MoorPy provides an additional feature to represent linear hydrostatic properties so that a Point can be used to represent a surface-piercing object that stays vertical and has a constant waterplane area over its height. The zSpan parameter defines the lower and upper extents of the point’s height, relative to the point coordinate, r. This provides a constant hydrostatic stiffness when the Point crosses the free surface, but has no effect the rest of the time.