2.23 Beta Release

Flexible tarp 2.0

AquaSim beta 2.23 updates the Flexible tarp load formulation to Flexible tarp 2.0. It replaces the original Flexible tarp formulation, which was valid up to AquaSim 2.22.0, and it is also used by the hybrid load formulations Hybrid flexible tarp/ Numerical diffraction and Hybrid flexible tarp/ MacCamy-Fuchs.

The main difference from the previous formulation is the new parameter KDiff, which AquaSim now calculates numerically. The previous formulation assumed KDiff = 1.0. Models that use flexible tarp may therefore give different results than in 2.22.

In AquaEdit, the defaults for lice skirts have been updated to follow Flexible tarp 2.0, and the default load formulation for lice skirts is now Flexible tarp.

Read more about the new formulation in the updated reports:

The Lice skirt tutorial has also been updated for 2.23, with new recommended values, new figures and new model files.

Changelog 2.23 (11.11.2026)

Solver

  • Flex tarp formulation has been updated to Flex tarp 2.0
  • Eccentric beam support (#2126)
  • Improved handling of membranes in waterline / in-and-out of water
  • Axial load inc net also written to PFAT file (#1776)

AquaEdit

  • Update defaults for lice skirt following flex tarp 2.0 (#2245)
    • Default is now Flexible tarp
  • Update exported values on eccentric cross-sections (#2126)
  • Changed name of RAO on elements to RAO displacement (#2130)
  • Thruster object implemented (#2160)
  • Added optional telemetry (#2214)
  • Added hydrostatic stiffness, convolution, point load elements, spring elements (#2220)
  • Improved angle measuring tools (#1981)
  • The installer will now let the user end running programs (#2248)
  • Fixed bug in wave generation when doing it on many load cases at the same time
  • Updated scripting API libraries
  • Hex nets now has a new option “Shrinkwrap” to fit hexes inside non-rectangular quad
  • The installer can now skip redistributables

AquaView

  • Fixed transforms on shapes bound to elements (#1447)
  • Shapes now take on the selected stress color when enabled (#1447)
  • Reduced maximum number of wave components allowed for better compatibility and performance
  • Errors in crossx data is now ignored when opening a file with errors
  • Changed node stresses to use the same hierarchy as elements (#2215)
  • Added support for element visibility data on beams (allows visual removal of linebreak on beams)

Other

  • modelconvert converts an AquaEdit model (.amodel) into solver input files from the command line, without opening AquaEdit. See the FAQ on modelconvert
  • ppreduce can now extract distance to the watersurface (Distance.Watersurface_[m])
  • Post-processor now extracts the available stresses instead of showing every stress

Changelog 2.23 (14.08.2026)

AquaEdit

  • Fixed matrix output on ElementSprings not being exported to text file
    • Matrix option now saved to amodel file
  • ElementSprings now have “use convolution” option, on by default
    • Turning it off exports the period/frequency list with negative index
    • Origin (3 floats) added
  • Current influence now saved to amodel file
  • Current influence now has CYRD (3 floats) for CurrentYawRateDrag in YAML file
    • Saved to amodel and exported to txt
  • ElementPointload now has “origin” (3 floats) fields

Changelog 2.23 (12.07.2026)

AquaEdit

  • Added support for obj/shape files with quads
  • Generate hex now allows comma in place of full stop as decimal separator

Other

  • Added -aselements option to ppreduce