Aeroelasticity (eBook)

Holt Ashley, Raymond L. Bisplinghoff, Robert L. Halfman (Autoren)

eBook Download: EPUB

2013
880 Seiten
Dover Publications (Verlag)
978-0-486-13243-3 (ISBN)

Infos

Highly regarded text deals with aeroelasticity as well as underlying aerodynamic and structural tools. Topics include incompressible flow, flutter, model theory, and much more. Over 300 illustrations. 1955 edition.

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Designed as both a textbook for advanced engineering students and a reference book for practicing engineers, this highly regarded work deals not only with the practical aspects of aeroelasticity, but the aerodynamic and structural tools upon which these rest. Accordingly, the book divides roughly into two halves: the first deals with the tools and the second with applications of the tools to aeroelastic phenomena.Topics include deformation of airplane structures under static and dynamic loads, approximate methods of computing natural mode shapes and frequencies, two-and three-dimensional incompressible flow, compressible flow, wings and bodies in three-dimensional unsteady flow, static aeroelastic phenomena, flutter, dynamic response phenomena, aeroelastic model theory, model design and construction, testing techniques and more. Chapters have been designed to progress from easy to difficult so that instructors using this book as an elementary text in aeroelasticity will find their purposes served by simply using the first parts of selected chapters.Helpful appendixes deal with such mathematical tools as matrices and linear systems (prerequisites include the usual engineering mathematics courses and advanced calculus), while many numerical examples are included throughout the text. Engineering students as well as practicing engineers will find this work an unmatched treatment of the topic and an indispensable reference for their libraries.

Inhalt

CHAPTER 1. INTRODUCTION TO AEROELASTICITY1-1 Definitions1-2 Historical background1-3 Influence of aeroelastic phenomena on design1-4 Comparison of wing critical speedsCHAPTER 2. DEFORMATIONS OF AIRPLANE STRUCTURES UNDER STATIC LOADS2-1 Introduction2-2 Elastic properties of structure2-3 Deformation due to several forces. Influence coefficients2-4 Properties of influence coefficients2-5 Strain energy in terms of influence coefficients2-6 Deformations under distributed forces. Influence functions2-7 Properties of influence functions2-8 The simplified elastic airplane2-9 Deformations of airplane wings2-10 Integration by weighting matrices2-11 Energy methods in deflection calculations2-12 Deformations of slender unswept wings2-13 Influence functions and coefficients of slender swept wings2-14 Deformations and influence coefficients of low aspect-ratio wings2-15 Influence coefficients of complex built-up wings by the principle of minimum strain energy2-16 Influence coefficients of complex built-up wings by the principle of minimum potential energy2-17 Calculation of deformations of solid wings of variable thickness and complex built-up wings by the Rayleigh-Ritz methodCHAPTER 3. DEFORMATION OF AIRPLANE STRUCTURES UNDER DYNAMIC LOADS3-1 Introduction3-2 Differential equations of motion of a beam3-3 Integral equation of motion of a slender beam3-4 Dynamic equilibrium of slender rotating beams in torsion3-5 Dynamic equilibrium of slender beams in torsion3-6 Dynamic equilibrium of restrained airplane wing3-7 Dynamic equilibrium of the unrestrained elastic airplane3-8 Energy methods 3-9 Approximate methods of solution to practical problems3-10 Approximate solutions by the Rayleigh-Ritz method3-11 Approximate solutions by the lumped parameter methodCHAPTER 4. APPROXIMATE METHODS OF COMPUTING NATURAL MODE SHAPES AND FREQUENCIES4-1 Introduction4-2 Natural modes and frequencies by energy methods4-3 Natural mode shapes and frequencies derived from the integral equation4-4 Natural mode shapes and frequencies derived from the differential equation4-5 Solution of characteristic equations4-6 Natural modes and frequencies of complex airplane structures4-7 Natural modes and frequencies of rotating beamsCHAPTER 5. AERODYNAMIC TOOLS: TWO- AND THREE-DIMENSIONAL INCOMPRESSIBLE FLOW5-1 Fundamentals: the concept of small disturbances5-2 Properties of incompressible flow with and without circulation5-3 Vortex flow5-4 Thin airfoils in steady motion5-5 Finite wings in steady motion5-6 Thin airfoils oscillating in incompressible flow5-7 Arbitrary motion of the thin airfoils in incompressible flow; the gust problemCHAPTER 6. AERODYNAMIC TOOLS: COMPRESSIBLE FLOW6-1 Introduction6-2 Wings and airfoils in steady subsonic flow; the Prandtl-Glauert transformation6-3 Airfoils and wings in steady supersonic flow6-4 Oscillating airfoils in subsonic flow6-5 Arbitrary small motions of airfoils in subsonic flow6-6 Oscillating airfoils in supersonic speeds6-7 Indicial airfoil motions in supersonic flow6-8 Unsteady motion of airfoils at Mach number oneCHAPTER 7. WINGS AND BODIES IN THREE-DIMENSIONAL UNSTEADY FLOW7-1 Introduction7-2 Oscillating finite wings in incompressible flow7-3 The influence of sweep7-4 Wings of very low aspect ratio in unsteady motion7-5 The influence of sweep7-6 Unsteady motion of nonlifting bodiesCHAPTER 8. STATIC AEROELASTIC PHENOMENA8-1 Introduction8-2 Twisting of simple two-dimensional wing with aileron8-3 Slender straight wings8-4 Swept wings8-5 Low aspect-ratio lifting surfaces of arbitrary planform and stiffnessCHAPTER 9. FLUTTER9-1 Introduction. The nature of flutter9-2 Flutter of a simple system with two degrees of freedom9-3 Exact treatment of the bending-torsion flutter of a uniform cantilever wing9-4 Aeroelastic modes9-5 Flutter analysis by assumed-mode methods9-6 Inclusion of finite span effects in flutter calculations9-7 The effect of compressibility on flutter9-8 Flutter of swept wings9-9 Wings of low aspect ratio9-10 Single-degree-of-freedom flutter9-11 Certain other interesting types of flutterCHAPTER 10. DYNAMIC RESPONSE PHENOMENA10-1 Introduction10-2 Equations of disturbed motion of an elastic airplane10-3 Systems with prescribed time-dependent external forces10-4 Transient stresses during landing10-5 Systems with external forces depending upon the motion10-6 Dynamic response to a discrete gust10-7 Dynamic response to continuous atmospheric turbulenceCHAPTER 11. AEROELASTIC MODEL THEORY11-1 Introduction11-2 Dimensional concepts11-3 Equations of motion11-4 Vibration model similarity laws11-5 Similarity laws for systems under steady airloads11-6 Flutter model similarity laws11-7 The unrestrained flutter model11-8 The dynamic stability modelCHAPTER 12. MODEL DESIGN AND CONSTRUCTION12-1 Introduction12-2 Structural simulation12-3 Elastic properties as functions of one variable12-4 Elastic properties as functions of two variables12-5 Shape simulation12-6 Inertial simulationCHAPTER 13. TESTING TECHNIQUES13-1 Introduction13-2 Measurement of structural flexibility13-3 Measurement of natural frequencies and mode shapes13-4 Steady-state aeroelastic testing13-5 Dynamic aeroelastic testing - full scale13-6 Dynamic aeroelastic testing - model scaleAPPENDICES. MATHEMATICAL TOOLSA MatricesB Integration by weighting numbersC Linear systemsREFERENCESAUTHOR INDEXSUBJECT INDEX

Produkt-Details

• Erscheint lt. Verlag: 18.6.2013
• Reihe/Serie: Dover Books on Aeronautical Engineering
• Sprache: englisch
• Maße: 140 x 140 mm
• Gewicht: 907 g
• Themenwelt: Natur / Technik ► Fahrzeuge / Flugzeuge / Schiffe ► Luftfahrt / Raumfahrt
• Themenwelt: Technik ► Fahrzeugbau / Schiffbau
• Themenwelt: Technik ► Luft- / Raumfahrttechnik
• ISBN-10: 0-486-13243-9 / 0486132439
• ISBN-13: 978-0-486-13243-3 / 9780486132433