|Semester||Autumn Semester 2020|
|Periodicity||yearly recurring course|
|Language of instruction||English|
|151-0368-00 V||Aeroelasticity||2 hrs|
|151-0368-00 U||Aeroelasticity||1 hrs|
|Abstract||Introduction to the basics and methods of Aeroelasticity. An overview of the main static and dynamic phenomena arising from the interaction between structural and aerodynamic loads.|
|Objective||The course will provide a basic physical understanding of flow-structure interaction. You will get to know the most important phenomena in the static and dynamic aeroelasticity, as well as a presentation of the most relevant analytical and numerical prediction methods.|
|Content||Introduction to steady and unsteady thin airfoil theory, extension to three dimension wing aerodynamics, strip theory, overview of numerical methods available (panel methods, CFD). |
Introduction to unsteady aerodynamics (theory): Theodorsen and Wagner functions. Unsteady aerodynamics observed from numerical experiments (CFD). Generation of simplified mathematical models.
Presentation of steady aeroelasticity: equations of equilibrium for the typical section, aeroelastic deformation, effectiveness of the aeroelastic system, stability (definition), divergence condition, role played by a control surface, control effectiveness, sweep angle, aeroelastic tailoring of bending-torsion coupling. Ritz model to model beams, use of FEM, modal condensation, choice of generalized coordinates.
Presentation of dynamic aeroelasticity: assessment of dynamic aeroelastic response of simple systems. Flutter kinematics (bending-twisting). Dynamic response of a simplified wing.
Numerical aeroelasticity (Test Cases extracted from the latest AIAA Aeroelastic Prediction Workshops).
Aeroelasticity of modern aircraft: assessment of the effects induced by the control surfaces and control systems (Aeroservoelasticity), active controlled aircraft, flutter-suppression systems, certification (EASA, FAA).
Planning and execution of Wind Tunnel experiments with aeroelastic models. Live-execution of an experiment in the WT of the ETH.
Brief presentation of non-linear phenomena like Limit-Cycle Oscillations (LCO)
|Lecture notes||A script in English language is available.|
|Literature||Bispilnghoff Ashley, Aeroelasticity|
Abbott, Theory of Wing sections,
Y. C. Fung, An Introduction to the Theory of Aeroelasticity, Dover Phoenix Editions.
|Performance assessment information (valid until the course unit is held again)|
|Performance assessment as a semester course|
|ECTS credits||4 credits|
|Language of examination||English|
|Repetition||The performance assessment is offered every session. Repetition possible without re-enrolling for the course unit.|
|Mode of examination||written 120 minutes|
|Additional information on mode of examination||Hilfsmittel schriftlich: Skript, sonstige in der Vorlesung ausgeteilte Dokumentation, persönliche Notizen, Taschenrechner.|
|Written aids||Skript, sonstige in der Vorlesung ausgeteilte Dokumentation (inkl. Moodle), persönliche Notizen.|
Script, additional material made available during classes and over Moodle, personal notes.
|This information can be updated until the beginning of the semester; information on the examination timetable is binding.|
|No public learning materials available.|
|Only public learning materials are listed.|
|No information on groups available.|
|Places||48 at the most|
|Waiting list||until 18.09.2020|
|Mechanical Engineering Master||Energy, Flows and Processes||W|
|Mechanical Engineering Master||Mechanics, Materials, Structures||W|