151-0368-00L  Aeroelasticity

SemesterAutumn Semester 2020
LecturersM. Righi
Periodicityyearly recurring course
Language of instructionEnglish



Courses

NumberTitleHoursLecturers
151-0368-00 VAeroelasticity2 hrs
Thu10:15-12:00HG D 5.2 »
M. Righi
151-0368-00 UAeroelasticity1 hrs
Thu12:15-13:00HG D 5.2 »
M. Righi

Catalogue data

AbstractIntroduction 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.
ObjectiveThe 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.
ContentIntroduction 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 notesA script in English language is available.
LiteratureBispilnghoff 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 credits4 credits
ExaminersM. Righi
Typesession examination
Language of examinationEnglish
RepetitionThe performance assessment is offered every session. Repetition possible without re-enrolling for the course unit.
Mode of examinationwritten 120 minutes
Additional information on mode of examinationHilfsmittel schriftlich: Skript, sonstige in der Vorlesung ausgeteilte Dokumentation, persönliche Notizen, Taschenrechner.
Written aidsSkript, 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

Places48 at the most
Waiting listuntil 18.09.2020

Offered in

ProgrammeSectionType
Mechanical Engineering MasterEnergy, Flows and ProcessesWInformation
Mechanical Engineering MasterMechanics, Materials, StructuresWInformation