Undervisningen vil bestå af dialog-baserede forelæsninger og
gruppearbejde med illustrative eksempler, hvor de introducerede
metoder anvendes.
Kursets varighed:
[Kurset følger ikke DTUs normale
skemastruktur]
Evalueringsform:
Hjælpemidler:
Bedømmelsesform:
Tidligere kursus:
45704
Pointspærring:
Anbefalede forudsætninger:
Deltagerbegrænsning:
Maksimum: 30
Overordnede kursusmål:
This course is aimed at graduate students interested in wind energy
research and at engineers in the wind turbine industry with the
purpose to learn how to describe, analyze and optimize the modal
dynamics and aeroelastic stability of wind turbines based on the
commercial three-bladed concept. The participants must have
pre-knowledge of vibration analysis and linear dynamics of
mechanical systems. No particular knowledge of wind turbines is
needed; however, a general knowledge of structural dynamics and/or
aerodynamics is required.
Læringsmål:
En studerende, der fuldt ud har opfyldt kursets mål, vil kunne:
List and describe the mode shapes of a three-bladed wind
turbine at standstill and in operation
Explain the methods of computing the modal frequencies, damping
and shapes of the structural and aeroelastic modes of operating
wind turbines
Apply these methods for modal analysis of wind turbines
Analyze and optimize modal dynamics of three-bladed wind
turbines, and to explain these structural modes in the aeroelastic
response of operating wind turbines
Explain the mechanisms of the aeroelastic instabilities called
stall-induced vibrations and classical flutter
Analyze the risk of these instabilities for a given wind
turbine
Present and disseminate the important issues of wind turbine
modal dynamics and aeroelastic stability to colleagues and fellow
students
Perform further state-of-the-art research within dynamics and
aeroelastic stability of wind turbines
Kursusindhold:
Modal frequencies, damping and shapes of the vibration modes of
operating wind turbines can be computed with and without the
influence of the aerodynamic forces from the surrounding flow. The
vibration modes of the unforced turbine (excluding the aerodynamic
forces) constitute a dynamic fingerprint that defines its modal
dynamics. These structural modes form the basis of the aeroelastic
response of wind turbines due to the aerodynamic forces. The
vibration modes of the turbine including the aerodynamic forces
determine its aeroelastic stability properties through the damping
of these aeroelastic modes. Stall-induced vibrations and classical
flutter are the two main mechanisms that may lead to aeroelastic
instabilities of three-bladed turbines with negative damping of an
aeroelastic mode.
Litteraturhenvisninger:
Noter vil blive udsendt nogle uger før kursusstart.
