The command to export SHEAR7 modes file from a batch script was erroneously reporting that the modes file cannot be generated for lines that included torsion. Modal analysis for a model with no lines results in an Access Violation error. This almost always resulted in the simulation failing due to unstabilty. If, during the simulation, one of the lines was released, then the OrcaFlex system solver could, under certain circumstances, incorrectly associate solver degrees of freedom with the line nodes. For example, consider a model with a calculated vessel and three lines attached. The problem only occurred when connections were released during the simulation. Previously the slam area was always the waterplane intersection area of the cylinder annulus, but for a hollow buoy hitting with its axis parallel to the water surface it is much more reasonable to use slam area equal to the waterplane intersection area of the whole cylinder (outer diameter).OrcaFlex spreadsheetThe OrcaFlex spreadsheet is now compatible with Office 2013.Bug fixes Previous versions of OrcaFlex contained a very subtle bug affecting dynamic simulations using the implicit solver. Orcaflex 9.6aBuoys The slam area used for slam force calculation was not very reasonable for a hollow spar buoy or towed fish whose axis was not normal to the surface.
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