Numerical Simulation of Gyroscopic Effects in Ansys
Translated title
Numerisk simulation af gyroskopiske effekter i Ansys
Author
Jensen , Christian
Term
4. term
Education
Publication year
2011
Submitted on
2011-08-25
Pages
78
Abstract
Dette speciale undersøger numerisk simulering af gyroskopiske effekter i Ansys. Der udføres en egenfrekvensanalyse (bestemmer et systems naturlige svingninger) og en transientsvarganalyse (hvordan systemet reagerer over tid på belastninger) i Ansys Classic for en simpel rotorkonfiguration, og resultaterne sammenholdes med analytiske løsninger. Dernæst analyseres den strukturelle respons i en flydende vindmølle, og betydningen af gyroskopiske effekter (kræfter fra roterende dele, der modstår ændringer i orientering) vurderes ved at sammenligne en parkeret tilstand med normal drift. Gyroskopisk virkning giver ekstra kræfter og vibrationer i tårnet, men disse er små sammenlignet med kræfter fra bølgebevægelser. De observerede tendenser stemmer overens med tidligere forskning.
This thesis examines numerical simulation of gyroscopic effects in Ansys. A natural frequency analysis (identifies a system’s resonant vibration modes) and a transient response analysis (how the system responds over time to loads) are performed in Ansys Classic for a simple rotor configuration, and the results are checked against analytical solutions. The structural response of a floating wind turbine is then assessed, and the influence of gyroscopic effects (forces from rotating parts that resist changes in orientation) is evaluated by comparing a parked condition with normal operation. Gyroscopic action adds extra forces and vibrations in the tower, but these are small compared with those caused by wave motion. The observed trends are consistent with previous research.
[This abstract was generated with the help of AI]
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