New & Noteworthy 1. General information Version no. 4.6.0 Date 2023-06-09 2. Ochi-Hubble wave spectrum The Ochi-Hubble spectrum is included in SIMO. The wave spectrum can now be used for coupled models. Figure 1. Ochi Hubble 3. ESDU wind spectrum The ESDU parametric wind spectrum as specified in API 2RP MET has been added. Figure 2. ESDU wind spectrum Figure 3. ESDU wind spectrum input data 4. Wave-current interaction and wave drift damping based on Aranhas formulation Slowly varying wave excitation forces can now take wave-current interaction into account based on Aranhas formulation. Wave drift force coefficients can be modified based on Aranhas formulation. Alternatively, a full difference-frequency QTF can be modified based on an extended Aranhas formulation. Wave drift damping coefficients can also be computed based on Aranhas formulation. Prior to execution of a SIMO condition (or RIFLEX condition with a SIMA body), wave drift force coefficients / wave drift damping coefficients / difference-frequency QTF will be modified based on the present current velocity and direction. In addition, the user can visualize the effect of wave-current interaction effects on the wave drift force coefficients / wave drift damping coefficients in a wave-current correction preview, as shown below. Figure 4. Wave-current interaction Figure 5. Wave drift damping 5. Dynamic calculation input Input data linked to support vessel and body Previously only one wind turbine could have an external control system, any additional turbines had Figure 6. Input data to support vessel and body 6. Decompose the total line force into global system Line forces is available in global system Requires storage of the transformation matrices Figure 7. Decompose total line force 7. User defined elements See SIMA documentation User defined elements may now be included in a model Stiffness, damping and loads may be included. Routines with methods for initialization, load step and finish are linked into a DLL by the user. On Linux, the code for the elements is compiled to a .so file. Currently, only single node elements are available. The element is primarily intended for modelling seafloor contact but may be used for other purposes 8. Structural data available as results Structural data are available as results for each end of the elements Global coordinates Arc length, external and hydrodynamic diameter Drag coefficients Current velocity in global directions Figure 8. Check off for structural data storage Figure 9. Structural data as result 9. New cross section for coupling between axial strain and torsional strain A separate cross-section has been added for axial-torsion coupling effects. The axisymmetric cross-section requires hyperelastic axial tension/elongation and torsion moment/rotation relations in addition to hysteresis effects in the bending/curvature relation. Figure 10. New cross section Figure 11. Coupling between axial strain and torsional strain 10. Wave kinematics key-file The wave kinematics results are shown are shown for each node (line → segment → node ) The key_<>_wavkin.txt file now contains all information needed to generate new kinematics for use in RIFLEX Figure 12. Wave kinematics ' ' R I F L E X - KEY FILE ' ------------------------ ' ' ' This key-file describes the contents of the BINARY file ' sima_wavkin.bin. ' The file contains time series of pre-generated wave kinematics ' stored as single precision (32-bit = 4 bytes) real numbers. ' ' The pre-generated wave kinematics for the selected FEM nodes are ' stored in columns on the file: ' ' Col. Supernode OR Global -- Static global coordinates -- ' nr. Type Line Segment Node FEM node X Y Z Unit Description ' ------------------------------------------------------------------------------------------------------- 0 TYPE IDEN SEGMENT NODE FEM-NODE XG-STATIC YG-STATIC ZG-STATIC UNIT DESCRIPTION 1 - - - - - - - - - FORTRAN specific data (please ignore) 2 - - - - - - - - s Time 3 SNOD anchor - - 1 535.360 0.000 -300.000 m Wave elevation 4 SNOD anchor - - 1 535.360 0.000 -300.000 m/s Fluid velocity, global X-direction 5 SNOD anchor - - 1 535.360 0.000 -300.000 m/s Fluid velocity, global Y-direction 6 SNOD anchor - - 1 535.360 0.000 -300.000 m/s Fluid velocity, global Z-direction 7 SNOD anchor - - 1 535.360 0.000 -300.000 m/s^2 Fluid acceleration, global X-direction 8 SNOD anchor - - 1 535.360 0.000 -300.000 m/s^2 Fluid acceleration, global Y-direction 9 SNOD anchor - - 1 535.360 0.000 -300.000 m/s^2 Fluid acceleration, global Z-direction 10 SNOD anchor - - 1 535.360 0.000 -300.000 kN/m^2 Fluid dynamic pressure 11. Improved search functionality Added search tips Figure 13. Search tips Limit the search to a part of the documentation: Figure 14. Limit search to a part of the documentation 12. Hydrodynamic data can be visualized Hydrodynamic data is now visible Open the 3D view of the model Select the hydrodynamic data Figure 15. Hydrodynamic data 13. Display of nodal components Size of nodal body is set by using the mass or the volume Figure 16. Display of nodal components 14. Distance vector Distance Line to Line operation in post processor is augmented with optional output of distance vector Figure 17. Line to Line distance vector 15. Improved documentation of the SYROPE fibre rope models Fibre rope model Fibre rope cross section Figure 18. Fibre rope model 16. Mass and inertia summary Calculate total mass, centre of mass and inertia tensor during static analysis, for: Selected lines In initial, or final (static) deformed configuration In specified output reference system Figure 19. Mass and inertia summary 17. Bibliography See Bibliography A separate section with bibliography is added to the user documentation Applications and benchmarking of the developed software tools References with keywords 18. Metocean task See Met ocean and How to make scatter data Added documentation on how to create scatter diagram Set up the type of scatter data Specify the scatter data calculation Make a and run the condition 19. SIMA will now store the table setup when customizing them (SIMA-9918) The table setup will be shared among all editors of the same type. Table setup can be rest to default Figure 20. Select customize table Figure 21. Customize table or reset to default settings 20. Improved inspection for failed workflows When workflows fail during run it is now possible to go directly to the failed workflow, even if it is many layers down Figure 22. Debug failed work flow 21. SIMO Description JIRA reference Anchor position in global coordinates for Catenary Lines are now available as results from a static calculation. SRV-2054 It is now possible to calculate wave drift damping from a full difference frequency QTF or Wave Drift Force coefficients using Aranha’s formula. SIMA-10001 It is now possible to correct wave drift coefficients (low-frequency excitation force) to account for wave-current interaction using Aranha’s formula. Similarly, a full difference-frequency QTF can be corrected by using an extended Aranha’s formula. Option to plot sum-frequency QTFs as curves with constant sum-frequency has been added SIMA-10134 The ESDU parametric wind spectrum as specified in API 2RP MET has been added. SRV-2010 Ochi-Hubble wave spectrum is included in SIMO. Ochi-Hubble wave spectrum can now be used for coupled models. SRV-1364 22. Riflex Description JIRA reference Cross sections for partially submerged elements are replaced by load models for partially submerged elements: "Morison partly submerged cross section" FishNet cross section is replaced by axisymmetric CrossSection with Net formulation SIMA-10019 SRV-1968 A separate cross-section has been added for axial-torsion coupling effects. SRV-1988 Eigenvalue solver has been replaced by a more numerically robust code. User input to the eigenvalue analysis has been simplified. SRV-1331 Dynamic SIMO/RIFLEX simulations can now be re-run without re-running static analysis. SIMA-10080 The key_<>_wavkin.txt file now contains all information needed to generate new kinematics for use in RIFLEX. SRV-2041 Structural data can now be exported to an Ascii file for all lines, segments, elements and elements ends. SRV-2026 User defined elements (stiffness, damping and loads) may now be included in a model. SRV-1961 Export of tension and curvature time series from VIVANA fatigue calculations. This can be used to calculate the stresses for umbilical & flexibles. SIMA-9114 Document the LAYFLEX option and the print of roller contact forces to file. SRV-1991 Improved visualization of Nodal body in 3D view SIMA-9840 Geometric stiffness matrix has been changed for elements where the bending moment/curvature relationship includes hysteresis effects. This improves the numerical stability and gives a significant improvement in convergence during static analysis. SRV-2053 Added possibility to decompose the total line force into global system. SIMA-10169 Fixed display of nodal components in 3D to ensure they are visualized even without mass or volume. SIMA-10119 It is now possible to calculate the total mass, centre of mass, and inertia tensor of selected lines. SRV-2033 23. SIMA Description JIRA reference Hydrodynamic data is now visible in the 3D view if a plot is open at the same time. SIMA-10086 Improved inspection for failed workflows. It is now possible to inspect the failing workflow directly, even if it is many levels down in the workflow hierarchy. SIMA-10107 New wizard to help create and test batch commands to run with SIMA Runtime Engine SIMA-10142 Presentation unit is now added to numerical inputs in workflow SIMA-7694 SIMA will now store the table setup when customizing them. The table setup will be shared among all editors of the same type. SIMA-9918 Filter in 3D view has been changed from "type filtering" to "specific object filtering". The user can select individual geometries and hide/unhide these. SIMA-10082 Metocean data can now be created using SIMApy. SIMA-10098 Distance Line to Line operation in post processor is augmented with optional output of distance vector. SIMA-10148 Improved 3D visualization when using small storage steps or start time different from 0.0 SRV-2015 The Marmo package in SIMApy has been renamed and moved to the simapy.sima.signals package. The sima root package has also been moved into the simapy package. SIMA-10143 A separate section with bibliography is added to the user documentation. SIMA-10097 Added documentation on how to create scatter diagram in Metocean task. SIMA-7899 Added functionality to only search within current active module in documentation. SIMA-10096 Improved documentation of the SYROPE fiber rope models