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What's New in Version 5.9

Version 5.9.2

Model set-up

Writing a model in Excel format

The procedure for saving the model in an Excel file are detailed in DeepLines model in Excel format.

Most components in a model can be written into Excel format. See the Components which cannot defined in Excel format section for more details.

Warning

Excel files in version 5.8.5 are compatible for reading, except for link objects (Link sheet) and spring or flexjoint connections (Connection sheet), since version 5.9.1 introduces the concept of Link properties. To load an Excel file in version 5.8.5 containing links, proceed as follows:

  • Load the Excel file using version 5.8.5 of the GUI executable,

  • and with version 5.9.1 of the GUI executable:

    • Load the DSK file created in the previous step,

    • Export the model to Excel format.

Realistic 3D

A 3D realistic view has been added to both the model (dsk) and the simulation (dss).

Substructure floater

A substructure model is now easier to define. For a mesh divided into several sub-structures, each substructure can be easily associated to a line segment or a rigid body of a model : this can easily set-up substructure models.

This new approach simplifies the existing concept of multi-structure floater since it no longer requires going through ISYMOST to associate sub-structures with model components.

HDB creation

HDB creation for multiple floaters and motion RAO's have been added. Low frequency QTF option has been added as well as the possibility to run some computations in a multi process mode to speed-up the HDB file creation.

Tubular joints flexibilities and stress concentration factors

Local joints flexibilities can be automatically computed from the Buitrago's parametric expressions.

Similarly, stress concentration factors (SCF) for tubular joints used by fatigue analysis can be automatically computed using the Efthymiou method.

For more details, see section Tubular joints : stiffnesses and Stress Concentration Factors.

Fatigue analysis on tubular joints using SCF is described in section Tubular joints - Connections (by subjoint)

Fatigue results

Marine growth : new options available

User can now choose if marine growth is defined according to water depth and calculate marine growth according to line initial position, line position after cable interfacing or after each static step. For more information, visit the dedicated page.

Structural Code Checks improvements

  • Stiffeners for circular or rectangular hollow stiffened local sections can be defined in a table (see Stiffeners).
  • The sea pressure for lines belonging to a substructure floater is computed as a Hull dynamic pressure.

  • Code check studies can be defined in Excel format and the Code check study, Structure properties or Joint sheets can be:

    • Either read from a complete model in Excel format or written from a complete model in DSK format (like all other sheets).

    • Either read a posteriori (once a model is loaded) from an Excel file containing the sheet or written independently of the rest of the model in an Excel file (and this is a specific feature of these sheets, see Importing or exporting specific sheets).

    In batch mode, it will be also possible to perform sensitivity analyses that means launching code check calculations with different parameter values. To do so, it is possible to load new values of the structure properties and/or code check parameters in Excel file before launching the code check processing (see Code check study) without opening the model in the GUI.

Improved speed of LOG and DSS files generation

The generation of .log and .dss files from an environment set has been optimized leading to substantial gain in time for large number of analyses.

Lines display

Line display has been updated to draw rectangular sections and apply beta angle rotations.
A line amplification option has been added to ease the visualization in the 3D view and in the 3D realistic view without having to change the line dimensions. This option can be defined in the line itself or through the quick data access.

Load excursions

A new load excursion property type has been created. It can be used to define load excursion properties without having to use an external .dat file. Different properties (as a type or as an imported file) can be used for the static and dynamic calculations of the same analysis and can be visualized with a graph. A breaking load has been added to the load excursions basic properties.

Rigid bodies

A frame zoom has been added to enlarge the local axes that could sometimes be too small to be viewed in the 3D view.

Aerodeep library

Review of dynamic stall models and slight modification of the Risoe model.
Introduction of a relaxation coefficient for tip loss of a vertical axis wind turbine (useful for very low wind speed cases).
Aerodynamic Output Review.

Numerical scheme

Two options for the Newmark scheme are now available from the interface. This is available from the advanced panel of the dynamic analysis in the calculation parameters of an analysis. At the beginning of a new time step:

  • Initial values X(t+dt) are computed value at X(t) [X : position vector of the nodes]
  • Initial values X(t+dt) are computed value at X(t+dt)=X(t)+V(t).dt [V : Velocity vector of the nodes]
  • Initial values X(t+dt) are computed value at X(t+dt)=X(t)+V(t).dt+0.5*A(t).dt.dt [A : Acceleration vector of the nodes]

Intensive calculation

An option in predefined results to request outputs during a calculation has been added.

Bug fixes

  • Bug on QDA Analysis data with Pretension or Initial angle in Calculation parameters (Mantis 1734)
  • The batch run of spectrum graphs only yields 0 (in DB and txt) (Mantis 1733)
  • Problem writing envelope data to the database (Mantis 1729)
  • Incorrect icon in the "Editing analysis" dialog box of a frequency analysis for the waveset object (Mantis 1728)
  • Bug in the selection of analyses in spectral fatigue (Mantis 1720)
  • Unwanted display of a button (Mantis 1718)
  • Crash on QDA Displacement opening (Mantis 1717)
  • Interface freezes with a Ctrl-C in the "Hydrodynamic diameter" of the "Edit segment types" dialog box (Mantis 1715)
  • When exporting a rigid body, the exported mesh center is not necessarily correct (Mantis 1712)
  • Error recording movement data in the QDA (Mantis 1708)
  • Bug on Mode number display value in dss (Mantis 1702)
  • Bug on pitch fault update in control mode (Mantis 1701)
  • Error on Global weight breakdown (Mantis 1699)
  • Bug on exported values in database (Mantis 1692)
  • Error on floater selection change in dialog box (Mantis 1689)
  • Error on spring post treatment (Mantis 1697)
  • Floater motion of calculations parameters not taken into account in a PtiDom calculation (Mantis 1696)
  • Add Windows format check for reals before generations and calculations (Mantis 1537)
  • Crash on dss build with missing UDK object (Mantis 1686)
  • Display problem in environment set current with multi heading option (Mantis 1666)
  • Loss of contact on lines (Mantis 1681)
  • Default export fatigue format in batch (Mantis 1650)
  • Definition of the fairleads position in cylindrical coordinates (Mantis 1649)
  • Incomplete error message (Mantis 1648)
  • Inconsistencies in calculation times in batch mode with last period option (Mantis 1677)
  • SQL export returns null values (Mantis 1680)
  • Crash when exporting database in batch mode with a function (Mantis 1676)
  • Post treatment error on TDP (Mantis 1672)
  • Steady Internal Fluids changes not reflected in the log file (Mantis 1668)
  • Error editing a line containing profile slugs (Mantis 1662)
  • Bug with Sea&Ground mesh file translation in the log file (Mantis 1656)
  • Error message on grouped Excel export (Mantis 1661)
  • Y-axis rotation inversion (Mantis 1659)
  • Incomplete error message (Mantis 1648)
  • Bug on display when removing a pressure display (Mantis 1640)
  • Crash on a fatigue analysis run (Mantis 1641)
  • Wrong default SCF values in fatigue post-processing (Mantis 1639)
  • Model export: 'Use All Existing' button does not work as it should (Mantis 1620)
  • Display problem with periods in the LF motion tab of an environment set (Mantis 1626)
  • Bug on display with some graphics cards when left or right clicking (Mantis 1625)
  • Crash on editing or regenerating an analysis set (Mantis 1635)
  • Envelop post-processing txt results on different ranges are overwritten (Mantis 1628)
  • Wrong display of lump mass on a line (Mantis 1623)
  • Bug in loading the values of an internal fluid variable file (Mantis 1619)
  • Bug on removal of records in EnvSet Matrix (Mantis 1541)
  • Problem copying pre-defined results monitored (Mantis 1615)
  • Crash on save after modifying line attributes (Mantis 1617)
  • X-Y static post-processing problem (Mantis 1551)
  • Infinite loop on batches without graph (Mantis 1616)
  • Temporary files not deleted (Mantis 1614)
  • Error in displacement selection (Mantis 1611)

Corrections for Structural code checks

  • Local efforts retrieved for code checks computation can be wrong for generic lines.
  • Code check DNV-RP-C202-2010: the ratio (3.5.2) is not computed if the condition in (3.5.8) is not checked.