1. Advanced wind/current coefficients file

This file can be used when the user specifies that the wind or current coefficients should be given as a function of:

  • relative wind/current direction

  • body vertical position

  • body roll angle

  • body pitch angle

This additional input file does not allow the use of comment lines. However, description fields (CHTEXT) have to be provided.

1.1. File format:

1.1.1. 2 input lines

CHTEXT

  • CHTEXT: character(512): Description text

NWIDIR

  • NWIDIR: integer: Number of relative wind/current directions for which the wind coefficients will be given

1.1.2. 1 input line

CHTEXT

  • CHTEXT: character(512): Description text

1.1.3. NWIDIR input lines

WIDIR

  • WIDIR: real: Relative wind/current direction, \(\mathrm {[deg]}\). Values must be included in the interval [0 , 360] and given in increasing order.

1.1.4. 2 input lines

CHTEXT

  • CHTEXT: character(512): Description text

NWIZ

  • NZ: integer: Number of body vertical positions for which the wind/current coefficients will be given

1.1.5. 1 input line

CHTEXT

  • CHTEXT: character(512): Description text

1.1.6. NWIZ input lines

WIZ

  • WIZ: real: Body vertical position, \(\mathrm {[L]}\). Values must be given in increasing order.

1.1.7. 2 input lines

CHTEXT

  • CHTEXT: character(512): Description text

NWIROLL

  • NWIROLL: integer: Number of body roll angles for which the wind/current coefficients will be given

1.1.8. 1 input line

CHTEXT

  • CHTEXT: character(512): Description text

1.1.9. NWIROLL input lines

WIROLL

  • WIROLL: real: Body roll angle, \(\mathrm {[deg]}\). Values must be included in the interval [-180 , 180] and given in increasing order.

1.1.10. 2 input lines

CHTEXT

  • CHTEXT: character(512): Description text

NWIPITCH

  • NWIPITCH: integer: Number of body roll angles for which the wind/current coefficients will be given

1.1.11. 1 input line

CHTEXT

  • CHTEXT: character(512): Description text

1.1.12. NWIPITCH input lines

WIPITCH

  • WIPITCH: real: Body pitch angle, \(\mathrm {[deg]}\). Values must be included in the interval [-180 , 180] and given in increasing order.

1.1.13. 1 input line

CHTEXT

  • CHTEXT: character(512): Description text

1.1.14. NWIDIRNWIZNWIROLL*NWIPITCH input lines, given in the following nested loops order: WIDIR>WIZ>WIROLL>WIPITCH

WI1   WI2   WI3   WI4   WI5   WI6

  • WIn: real: wind/current force coefficient for degree of freedom n, \(\mathrm {[FT^2/L^2,FT^2/L]}\)

Note: SIMO expects that the wind/current coefficients are given as nested loops as follows:

for idDIR=1:NWIDIR

    for idZ=1:NWIZ

        for idROLL=1:NWIROLL

            for idPITCH=1:NWIPITCH

                read WIn corresponding to WIDIR(idDIR),WIZ(idZ),WIROLL(idROLL),WIPITCH(idPITCH)

            end for

        end for

    end for

end for