A set of routines that model tuned-mass damping, for use with FAST v8.

by William La Cava, Semyung Park, and Matt Lackner
University of Massachusetts, Amherst

The tuned mass damper (TMD) module adds functionality to FAST v8 that simulates the addition of TMDs in the nacelle and/or tower for structural control. The TMDs are two independent, one- DOF, linear mass-spring-damping elements that act in the fore-aft and side-side directions or one single omni-directional TMD. They can be placed relative to the nacelle reference position or base of the undeflected tower using the options in the input file. The TMD module is added as a sub-module of ServoDyn.

The theory manual describes the theoretical background and the code changes in FAST v8. For application studies of these systems, refer to the citations in the documentation section below.

You may download the following files:


  1. La Cava W. and Lackner, M.A. Theory Manual for the Tuned Mass Damper Module in FAST v8. March 2015.
  2. Lackner M.A., Rotea, M., “Structural Control of Floating Wind Turbines.” Mechatronics, Vol. 21, No. 4: 704-719, 2011.
  3. Lackner M.A., Rotea, M., “Passive Structural Control of Offshore Wind Turbines.” Wind Energy, Vol. 14, No. 3: 373-388, 2011.
  4. Stewart G., Lackner M.A., “The Effect of Actuator Dynamics on Active Structural Control of Offshore Wind Turbines.” Engineering Structures, Vol. 33, No. 5: 1807-1816, 2011.
  5. Namik H., Rotea M.A., Lackner M.A., “Active Structural Control with Actuator Dynamics on a Floating Wind Turbine.” 51st AIAA Aerospace Sciences Meeting and Exhibit, Dallas, TX, January 2013.
  6. Stewart G., Lackner M.A., “Offshore Wind Turbine Load Reduction Employing Optimal Passive Tuned Mass Damping Systems.” IEEE Transactions on Control Systems Technology, Vol. 21, No. 4, 2013.
  7. Stewart G., Lackner M.A., “The impact of passive tuned mass dampers and wind-wave misalignment on offshore wind turbine loads.” Engineering Structures, Vol. 73, No. 15: 54-61, 2014.

TMD Archives (v1.02.01-sp, 8-Jan-2016)

The TMD archives contain the theory manual, sample input files, a simple test, and all the source code necessary to compile the driver project. You may choose from two different formats:

Programming Language:     Technology:     Wind and Water Tools:

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If you want to refer to this website in a report, here is a reference you can use:
NWTC Information Portal (TMD). Last modified 08-April-2016 ; Accessed 05-April-2020