<!doctype html public "-//w3c//dtd html 4.0 transitional//en">Aerospace Engineering 6220:

Rotorcraft Dynamics and Aeroelasticity

School of Aerospace Engineering
Georgia Institute of Technology

Profs. Dewey H. Hodges and J. V. R. Prasad

Prof. Hodges' Office: Weber 200-C; Phone: 404-894-8201

E-mail: dhodges@gatech.edu

Prof. Prasad's Office: Knight 421-A; Phone 404-894-3043

E-mail: jvr.prasad@ae.gatech.edu


Time and place: The class hours are 1:05-1:55 p.m., Mondays, Wednesdays, and Fridays. The place is Guggenheim 244.


Text: There is no required text for the course. The following textbooks contain a lot of relevant material and are references for the course content:


Bielawa, Richard L.: Rotary Wing Structural Dynamics and Aeroelasticity, 2nd edition, AIAA, Reston, Virginia, 2006.


Bramwell, Anthony R. S.; Done, George T. S.; Balmford, David: Bramwell's Helicopter Dynamics, 2nd edition, Butterworth-Heinemann, Oxford, 2001.


Hodges, Dewey H.: Nonlinear Composite Beam Theory, AIAA, Reston, Virginia, 2006.


Johnson, Wayne: Helicopter Theory, Princeton University Press, Princeton, New Jersey, 1980 (also Dover Publications, Inc., New York, 1994).


Course Goals: To introduce students to the fundamentals of rotorcraft dynamics and aeroelasticity, and to provide necessary background to equip students to do additional research and analysis in the field.


Office hours:


Prof. Hodges' Office hours: to be arranged


Prof. Prasad's Office hours: to be arranged


Grading Policy:


Prof. Hodges' portion of the course: Homework counts as 100%. Discussion of homework solutions among students is permitted, but the work you turn in must be entirely your own.


Prof. Prasad's portion: Homework counts as 70%. Project counts as 30%. Discussion of homework and project among students is permitted, but the work you turn in must be your own.




Prof. Hodges's portion (Jan. 7-Feb. 27, 2012)


Prof. Prasad's portion (Mar. 1-April 26, 2012): see Prof. Prasad's web page


Homework assignments: Prof. Hodges's problems:


Homeworks 1 and 2

Homework 3

Homework 4


For Prof. Prasad's problems, see his web page


Handouts: to be posted on the web pages of Prof. Hodges or Prof. Prasad


Ormiston and Hodges (1972)

Flap-lag potential energy

Potential energy contribution to pitch-lag coupling terms

Handwritten flap-lag derivation

Flap-lag perturbation (for pitch-lag coupling)

Discussion of flap-lag stability

Rotating beam derivation

Transfer matrix method

Ground resonance

Special cases

Nonlinear Theory for Composite Blades


Updated 1/3/2013