1. Fish net cross section

Additional to Data Group C: Component Data

A fish net is subdivided into sections where each section is represented by a cable/bar element with equivalent properties.

Note that the fish net load model requires that the net plane is defined. The net plane is the plane containing the updated local element X-axis and the fixed reference vector specified in the input group LOCAL ELEMENT AXIS.

1.1. Data group identifier

NEW COMPonent CRS6

1.2. Component type identifier

CMPTYP-ID TEMP

  • CMPTYP-ID: character(8): Component type identifier

  • TEMP: real: Temperature at which the specification applies. In the present version this item serves only as label

1.3. Mass and volume

AMS AE

  • AMS: real: Mass/unit length \(\mathrm {[M/L]}\)

  • AE: real: External volume per length \(\mathrm {[L^2]}\)

1.4. Stiffness properties classification

IEA

  • IEA: integer: Axial stiffness code

    • 1: constant stiffness

    • N: table with N paris of tension - elongation to be specified 2 ⇐ N ⇐ 10

1.5. Axial stiffness. Case 1 IEA = 1

EA

  • EA: real > 0: Axial stiffness \(\mathrm {[F]}\)

1.6. Axial stiffness. Case 2 IEA = N

EAF(1) ELONG(1) . . . EAF(N) ELONG(N)

  • EAF(1): real: Axial force corresponding to relative elongation ELONG(1) \(\mathrm {[F]}\)

  • .

  • .

  • .

  • ELONG(N): real: Relative elongation \(\mathrm {[1]}\)

EAF and ELONG must be given in increasing order.

1.7. Net properties

SN WIDTH1 WIDTH2 REDVEL

  • SN: real: Solidity ratio \(\mathrm {[1]}\)

  • WIDTH1: real: Net width at segment end 1 \(\mathrm {[L]}\)

  • WIDTH2: real: Net width at segment end 2 \(\mathrm {[L]}\)

  • REDVEL: real: Reduction factor for current velocity

1.8. Damping specification

Identical to input for cross-section type CRS1, see data group Damping specification.

1.9. Hydrodynamic force coefficients

AMX AMY

  • AMX: real: Added mass per length, tangential direction \(\mathrm {[M/L]}\)

  • AMY: real: Added mass per length, normal direction \(\mathrm {[M/L]}\)

1.10. Capacity parameter

TB YCURMX

  • TB: real: Tension capacity \(\mathrm {[F]}\)

  • YCURMX: real: Maximum curvature \(\mathrm {[I/L]}\)

These parameters are dummy in the present version.