Numerical Simulation of Gyroscopic Effects in Ansys
Translated title
Numerisk simulation af gyroskopiske effekter i Ansys
Author
Term
4. term
Education
Publication year
2011
Submitted on
2011-08-31
Pages
78
Abstract
Rapporten omhandler numerisk simulation af gyroskopiske effekter i Ansys Classic. En egen- frekvens analyse og en transient respons analyse udføres i Ansys for en simpel rotor konfigura- tion. Resultaterne er verificeret med analytiske beregninger. Det strukturelle respons er analyseret for en flyende vindmølle og den gyroskopiske effekt er undersøgt. Dette er gjort ved at sammenligne to situationer, hvor vindmøllen i den første situa- tion er analyseret i parkeret tilstand og i den anden situation i operationel tilstand. Den gyroskopiske effekt genererer ekstra kræfter og vibrationer i vindmølletårnet. Disse kræf- ter er i midlertidig meget små i forhold til de kræfter, der genereres som følge af bølgebevægel- sen af vindmøllen. De observerede tendenser i dette projekt svarer overens med tidligere forsk- ning.
The subject of this thesis is Numerical Simulation of Gyroscopic Effects in Ansys. A natural frequency analysis and a transient response analysis are performed in Ansys Classic for a sim- ple rotor configuration. The results are verified with analytical solutions. The structural response of a floating wind turbine is analyzed and the influence of gyroscopic effects is examined. This is done by comparing two situations where in the first situation the wind turbine is analyzed in parked condition and in the second situation in operational mode. The gyroscopic effect introduces additional forces and vibrations in the tower of the wind tur- bine. However, these forces are very small compared to forces generated by the wave motion of the wind turbine. The tendencies observed in this thesis work correspond to previous research.
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