6.3. SubDyn User Guide and Theory Manual

This manual offers both a quick reference guide and a more in-depth theory guide for the SubDyn software program. It is intended to be used by the general user in combination with the FAST and HydroDyn manuals. The manual will be updated as new releases are issued and as needed to provide further information on advancements or modifications to the software.

The authors would like to acknowledge Huimin Song, a post-doctoral researcher at the National Renewable Energy Laboratory, for her contribution to the development of SubDyn. Amy Robertson and Fabian Wendt provided helpful feedback on the document, and Braulio Barahona produced some of the graphics. We also are grateful to the U.S. Department of Energy Wind and Water Power Program for supporting the development of this software.

• 6.3.1. Introduction
• 6.3.2. Running SubDyn
  • 6.3.2.1. Downloading the SubDyn Software
  • 6.3.2.2. Running SubDyn
• 6.3.3. Input Files
  • 6.3.3.1. Units
  • 6.3.3.2. SubDyn Driver Input File
  • 6.3.3.3. SubDyn Primary Input File
  • 6.3.3.4. SSI Input File
• 6.3.4. Output Files
  • 6.3.4.1. Echo File
  • 6.3.4.2. Summary File
  • 6.3.4.3. Results File
• 6.3.5. Modeling Considerations
  • 6.3.5.1. Model Discretization
  • 6.3.5.2. Foundations
  • 6.3.5.3. Member Overlap
  • 6.3.5.4. Substructure Tower/Turbine Coupling
  • 6.3.5.5. Self-Weight Calculations
  • 6.3.5.6. Note On Other Load Calculations
  • 6.3.5.7. Craig-Bampton Guidelines
  • 6.3.5.8. Integration Time Step Guidelines
• 6.3.6. SubDyn Theory
  • 6.3.6.1. Overview
  • 6.3.6.2. Integration with the FAST Modularization Framework
  • 6.3.6.3. Coordinate Systems
  • 6.3.6.4. Linear Finite-Element Beam Model
  • 6.3.6.5. Dynamic System of Equations and C-B Reduction
• 6.3.7. Known Limitations and Future Work
• 6.3.8. References
• 6.3.9. Appendix A. OC4 Jacket Input File
• 6.3.10. Appendix B. OC4 Jacket Driver File
• 6.3.11. Appendix C. OC4 Jacket SSI Input File
• 6.3.12. Appendix D. List of Output Channels
• 6.3.13. Appendix E. Compiling Stand-Alone SubDyn
• 6.3.14. Appendix F. Major Changes in SubDyn
  • 6.3.14.1. V1.03.00a-rrd (September 2017)
  • 6.3.14.2. V1.01.01a-rrd (September 2014)
  • 6.3.14.3. V1.01.00a-rrd (June 2014)