Sandia NRT Blade-0 Laboratory Modal Survey

Research output: NRELPresentation


Modal testing was performed on the Sandia NRT Blade-0 in building A-60 at NREL/NWTC. Modal testing was intended to identify the fundamental frequencies of the blade. The blade was cantilevered to the A-60 test stand. Fundamental frequencies were identified using impact modal testing. Additional tests included free-decay testing to quantify damping at small displacements. Small-displacement modal testing aims to minimize the influence of aerodynamic damping; roaming accelerometer impact testing with the development of a dynamic frame model enabled visualization of mode shapes.
Original languageAmerican English
Number of pages28
StatePublished - 2021

NREL Publication Number

  • NREL/PR-5000-79417


  • modal survey
  • national rotor testbed
  • NRT
  • wind turbine blade


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