151-0368-00L Aeroelasticity
| Semester | Autumn Semester 2020 |
| Lecturers | M. Righi |
| Periodicity | yearly recurring course |
| Language of instruction | English |
Courses
| Number | Title | Hours | Lecturers | ||||
|---|---|---|---|---|---|---|---|
| 151-0368-00 V | Aeroelasticity | 2 hrs |
| M. Righi | |||
| 151-0368-00 U | Aeroelasticity | 1 hrs |
| M. Righi |
Catalogue data
| 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
| Performance assessment information (valid until the course unit is held again) | |
Performance assessment as a semester course | |
| ECTS credits | 4 credits |
| Examiners | M. Righi |
| Type | session examination |
| 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. | |
Learning materials
| No public learning materials available. | |
| Only public learning materials are listed. |
Groups
| No information on groups available. |
Restrictions
| Places | 48 at the most |
| Waiting list | until 18.09.2020 |
Offered in
| Programme | Section | Type | |
|---|---|---|---|
| Mechanical Engineering Master | Energy, Flows and Processes | W |  |
| Mechanical Engineering Master | Mechanics, Materials, Structures | W | |