Engineering topics
Publications and source records attributed to Garrick, I. E..
A historical survey of aeroelasticity, and in particular flutter, is given. The instances in which aeroelasticity played a major role in aircraft failure are detailed, and developments taking flutter into account from the days of the early aviation pioneers up to their successors in the 1950's are reviewed. Aerodynamic theories analyzing flutter are also discussed.
The problem of determining the two dimensional potential flow around wing sections of any shape is examined. The problem is condensed into the compact form of an integral equation capable of yielding numerical solutions by a direct process. An attempt is made to analyze and coordinate the results of earlier studies relating to properties of wing sections. The existing approximate theory of thin wing sections and the Joukowski theory with its numerous generalizations are reduced to special cases of the general theory of arbitrary sections, permitting a clearer perspective of the entire field. The method which permits the determination of the velocity at any point of an arbitrary section and the associated lift and moments is described. The method is also discussed in terms for developing new shapes of preassigned aerodynamical properties.
The lecture aims at giving a broad survey of the current reaches of aeroelasticity with some narrower views for the specialist. After a short historical review of concepts for orientation, several topics are briefly presented. These touch on current flight vehicles having special points of aeroelastic interest; recent developments in the active control of aeroelastic response including control of flutter; remarks on the unsteady aerodynamics of arbitrary configurations; problems of the space shuttle related to aeroelasticity; and aeroelastic response in flight.
Achievements of the past decade, the state of the art, and trends in aeroelasticity are discussed. Topics selected for this end include: (1) brief orientation into the history of the subject, (2) roles of active controls and the concept of aerodynamic energy in load alleviation and in flutter suppression, (3) computerized aeroelastic analysis, (4) aeroelastic effects in stability, (5) aeroelastic optimization, (6) the use of composites, (7) recent applications of lifting surface theory to interfering surfaces and control surfaces, (8) transonic flow considerations, and (9) some problems related to the space shuttle.
Based on selected topics, the paper is broadly aimed to indicate achievements of the past decade, the state of the art, and trends in aeroelasticity. Topics selected for this end include: brief orientation into the history of the subject, roles of active controls and the concept of aerodynamic energy in load alleviation and in flutter suppression, computerized aeroelastic analysis, aeroelastic effects in stability, aeroelastic optimization, the use of composites, recent applications of lifting surface theory to interfering surfaces and control surfaces, transonic flow considerations, and some problems related to the space shuttle.
Aeroelastic and aerothermoelastic development of winged interorbital space shuttle concerning panel flutter, stability and nonstationary lifting surface theory
Atmospheric effects on sonic boom characteristics
Statistical analyses of test flight data for atmospheric effects on sonic boom
On going education and training for scientists and engineers - general discussion of methods ongoing education and training for scientists and engineers - general discussion of methods
Mathematical simulation techniques for structural analyses on space vehicles
Free-flight boundary-layer aerodynamic noise measurements
Discussion of x-15 aircraft panel flutter and associated aerothermoelastic problems
Manual on aeroelasticity, introduction
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