SD2810 Aeroelasticity 9.0 credits

Aeroelasticitet

When an aircraft is exposed to aerodynamic forces, its elastic deformation can give rise to a number of effects that are critical to flight safety. This is an introductory course on the topic focusing on learning of fundamental aeroelastic phenomena and methods for aeroelastic analysis

  • Education cycle

    Second cycle
  • Main field of study

  • Grading scale

    A, B, C, D, E, FX, F

Course offerings

Autumn 19 for programme students

Autumn 18 for programme students

Intended learning outcomes

The overall objectives of the course are that you should be able to:

  • explain how the aeroelastic phenomena flutter, divergence and aileron reversal arise and how they affect aircraft performance,
  • formulate aeroelastic equations of motion and use therse to derive fundamental relations for aeroelastic analysis,
  • perform a preliminary aeroelastic analysis of a slender wing structure in low-speed airflow, and
  • explain under what circumstances an aeroelastic analysis can be expected to produce useful results. 

Besides from the aims related to your knowledge and skills in aeroelasticity, the course also aims at improving your ability to

  • learn with and from other students,
  • approach and solve a complex engineering task,
  • present your results and conclusions effectively, and
  • review and give feedback on work performed by a colleague.

Course main content

The course is based on a problem setting where an elastic wind-tunnel model is utilized for learning of aeroelastic phenomena and development of aeroelastic analysis. Emphasis is put on the analysis of aeroelastic deformation, divergence, flutter and control surface efficiency, based on finite element analysis and potential flow methods. In order to create a natural and creative learning environment, the course is based on a peer learning approach. You will therefore belong to a student team that meets regularly to discuss around selected parts of the literature, and decide on topics that need further attention in the course. The technical work mainly consists of the development of an aeroelastic analysis  in Matlab that should be compared with experimental results from wind tunnel testing.  Finally, you are challenged to perform and document a preliminary aeroelastic analysis of an airframe.

Eligibility

SD2411 Lightweight Structures and FEM, and SD2805 Flight Mechanics or permission from the coordinator.

Literature

Borglund D. and Eller D., Aeroelasticity of Slender Wing Structures in Low-Speed Airflow. Lecture Notes, KTH Aeronautical & Vehicle Engineering..

Examination

  • LAB1 - Laboratory Work, 3.0, grading scale: P, F
  • PRO1 - Project, 3.0, grading scale: P, F
  • TEN1 - Examination, 3.0, grading scale: P, F

Requirements for final grade

Laboratory work (LAB1; 3 university credits)
Oral exam (TEN1; 3 university credits)
Project assignment (PRO1; 3 university credits)

Offered by

SCI/Aeronautical and Vehicle Engineering

Contact

Ulf Ringertz (rzu@kth.se)

Examiner

Ulf Ringertz <rzu@kth.se>

Version

Course syllabus valid from: Autumn 2009.
Examination information valid from: Autumn 2007.