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SUMMARY:"DYN2#1 - Non-Linear data-driven model for a solar tracker aeroela
 stic simulation"
DTSTART;VALUE=DATE-TIME:20230712T084000Z
DTEND;VALUE=DATE-TIME:20230712T090000Z
DTSTAMP;VALUE=DATE-TIME:20260308T095737Z
UID:indico-contribution-670@events.isae-supaero.fr
DESCRIPTION:Speakers: Castellani Francesco ()\nThe solar tracker industry 
 has evolved dramatically in recent years with huge PV-farm demanding for c
 hallenging structural design. In such framework it is essential to conside
 r aeroelastic wind loads due to flow unsteadiness and vortex shedding. Dyn
 amic loads estimation is therefore not easy: this is due to the fact that\
 , being the tracking systems equipped with a torsional flexible constraint
 s\, complex fluid-structure interaction phenomena\, briefly called flutter
 \, can be triggered. The latter modify the load scenario and the structura
 l damping in an apparently unpredictable way\, generating a dangerous self
 -excited load on the system\, that can be unhealthy for the structure inte
 grity. The aeroelastic behaviour of the panel could be described through d
 imensionless parameters (the so-called "Scanlan Derivatives")\, that usual
 ly are function of the reduced wind speed and that can be estimated starti
 ng from damping and frequency under freely excited oscillation\, basing on
  the classic vibration's theory. Several experiments have been performed i
 n the €œR. Balli€ Wind Tunnel at the University of Perugia to estim
 ate such parameters in different wind condition using a scaled model of th
 e solar tracker. Results demonstrate how these aeroelastic parameters are 
 function of wind speed and of the angle of attack\; this behavior affect d
 ramatically the final critical wind speed (the speed at which flutter occu
 rs). Basing on the experimental campaign a numerical model has been develo
 ped in order to reproduce the non-linear aeroelastic behavior of the struc
 ture. A comparison of the results of the linear and the data-driven non-li
 near model were discovered to be a very useful tool in order to understand
  the complex dynamic behavior of the structure: it has been found that und
 er certain operating conditions the non-linear model provides an average a
 mplitude error five times lower than the value obtained from the linear mo
 del.Only this type of analysis can give useful insight to improve the chal
 lenging design of huge solar tracker structures.\n\nhttps://events.isae.fr
 /event/22/contributions/670/
LOCATION:Toulouse
URL:https://events.isae.fr/event/22/contributions/670/
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