A master thesis from Aalborg University
Numerical Simulation of Gyroscopic Effects in Ansys
[Numerisk simulation af gyroskopiske effekter i Ansys]
Author(s)
Term
4. term
Education
Publication year
2011
Submitted on
2011-08-31
Pages
78 pages
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.
Keywords
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.