#include <stdio.h>#include <stdlib.h>#include <cmath>#include <iostream>#include <vector>
Include dependency graph for QSlines.hpp:
Go to the source code of this file.
Functions | |
| template<typename T > | |
| int | Catenary (T XF, T ZF, T L, T EA, T W, T CB, T Tol, T *HFout, T *VFout, T *HAout, T *VAout, unsigned int Nnodes, vector< T > &s, vector< T > &X, vector< T > &Z, vector< T > &Te) |
| Positions and tensions of a single mooring line. More... | |
Variables | |
| int | longwinded = 0 |
| switch to turn on excessive output for locating crashes | |
Detailed Description
C/C++ translation and adaptation of the Fortran subroutine "Catenary" written by Jason Jonkman.
The original function is contained in the National Renewable Energy Laboratory's FAST version 7 source code, available at https://nwtc.nrel.gov/FAST7 and with a disclaimer at http://wind.nrel.gov/designcodes/disclaimer.html.
This quasi-static analysis is used as a starting point for getting the initial line profiles.
Function Documentation
◆ Catenary()
template<typename T >
| int Catenary | ( | T | XF, |
| T | ZF, | ||
| T | L, | ||
| T | EA, | ||
| T | W, | ||
| T | CB, | ||
| T | Tol, | ||
| T * | HFout, | ||
| T * | VFout, | ||
| T * | HAout, | ||
| T * | VAout, | ||
| unsigned int | Nnodes, | ||
| vector< T > & | s, | ||
| vector< T > & | X, | ||
| vector< T > & | Z, | ||
| vector< T > & | Te | ||
| ) |
Positions and tensions of a single mooring line.
A quasi-static approach used as a starting point for getting the initial line profiles
- Parameters
-
XF Horizontal distance between anchor and fairlead (meters) ZF Vertical distance between anchor and fairlead (meters) L Unstretched length of line (meters) EA Extensional stiffness of line (N) W Weight of line in fluid per unit length (N/m) CB Coefficient of seabed static friction drag (a negative value indicates no seabed) (-) Tol Convergence tolerance within Newton-Raphson iteration specified as a fraction of tension (-) HFout Output effective horizontal tension in line at the fairlead (N) VFout Output effective vertical tension in line at the fairlead (N) HAout Output effective horizontal tension in line at the anchor (N) VAout Output effective vertical tension in line at the anchor (N) Nnodes Number of nodes where the line position and tension can be output (-) s Unstretched arc distance along line from anchor to each node where the line position and tension can be output (meters) X Output horizontal locations of each line node relative to the anchor (meters) Z Output vertical locations of each line node relative to the anchor (meters) Te Output effective line tensions at each node (N)
- Returns
- 1 if the quasi-static equilibrium is found, -1 otherwise
To avoid an ill-conditioned situation, make sure HF does not go less
Line position and tension at each node:
Here is the caller graph for this function:
