Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity
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Beschreibung
Aeroelasticity is an essential discipline for the design of airplanes, unmanned systems, and innovative configurations.
This book introduces the subject of unsteady aerodynamics and dynamic aeroelasticity by presenting industry-standard techniques, such as the Doublet Lattice Method for nonplanar wing systems. “Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity'' is a useful reference for aerospace engineers and users of NASTRAN and ZAERO but is also an excellent complementary textbook for senior undergraduate and graduate students.
- Fully develops the theory of acceleration potential, fundamental to the unsteady aerodynamics behind the Doublet Lattice Method;
- Explains fully the industry-standard unsteady aerodynamics capability: the Doublet Lattice Method;
- Theoretically develops various state-of-the-art methods to determine the flutter point;
- Clarifies the differences between ``cantilever flutter’’ and ``body freedom flutter’’;
- Introduces the nonlinear aeroelasticity of Joined Wings and innovative wing systems.
Luciano Demasi has written a comprehensive and insightful book on aeroelasticity as practiced today. The careful and deep attention to the fundamentals and a unique and valuable discussion of the implementation of Doublet Lattice aerodynamics are special features of the book. The author also ranges over a number of additional topics including current and promising aircraft and wing concepts that bring new challenges to the aeroelastician.
The student new to the topic as well as the experienced practitioner will find much to ponder and benefit from a careful reading of this text. — Prof. Earl Dowell, Duke University
Aeroelasticity is an essential discipline for the design of airplanes, unmanned systems, and innovative configurations.
This book introduces the subject of unsteady aerodynamics and dynamic aeroelasticity by presenting industry-standard techniques, such as the Doublet Lattice Method for nonplanar wing systems. “Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity'' is a useful reference for aerospace engineers and users of NASTRAN and ZAERO but is also an excellent complementary textbook for senior undergraduate and graduate students.
The theoretical material includes:
· Fundamental equations of aerodynamics.
· Concepts of Velocity and Acceleration Potentials.
· Theory of small perturbations.
· Virtual displacements and work, Hamilton's Principle, and Lagrange's Equations.
· Aeroelastic equations expressed in the time, Laplace, and Fourier domains.
· Concept of Generalized Aerodynamic Force Matrix.
· Complete derivation of the nonplanar kernel for unsteady aerodynamic analyses.
· Detailed derivation of the Doublet Lattice Method.
· Linear Time-Invariant systems and stability analysis.
· Rational function approximation for the generalized aerodynamic force matrix.
· Fluid-structure boundary conditions and splining.
· Root locus technique.
· Techniques to find the flutter point: k, k-E, p-k, non-iterative p-k, g, second-order g, GAAM, p, p-L, p-p, and CV methods.
Fully develops the theory of acceleration potential, fundamental to the unsteady aerodynamics Explains fully the industry-standard unsteady aerodynamics capability: the Doublet Lattice Method Theoretically develops various state-of-the-art methods to determine the flutter point
Autor*in
Luciano Demasi
Themen in »Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity«
Doublet Lattice Method Flutter Aeroelasticity Body freedom flutter Root locus Roger’s Approximation Vortex Lattice Method Unsteady Aerodynamics Vibration Modes Splining Thin-plate splines Fluid-structure interaction Free play Nonlinear aeroelasticity
Stimmen zu »Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity«
“This book represents a comprehensive treatment of unsteady aerodynamics and dynamic aeroelasticity, covering the fundamentals of unsteady aerodynamics and dynamic aeroelasticity in 831 pages, 39 chapters and 18 appendices. It explains the fundamentals of the doublet lattice method and its applications, introduction to nonlinear aeroelasticity, including the effects of control surface free play giving rise to limit cycle oscillations. It further discusses techniques for mapping the structural vibration mode shapes from a finite element mesh to the corresponding aerodynamic mesh, and methods of determining the flutter point. Each chapter includes a list of competency questions which makes it very useful for teaching the subject. In short, it is an excellent textbook for teaching the subject of aeroelasticity, and a very useful reference for practicing aerospace engineers.”
(Prof. Gautam SenGupta, University of Washington, Bothell, WA, and Boeing Technical Fellow (Retired))
“Luciano Demasi has written a comprehensive and insightful book on aeroelasticity as practiced today. The careful and deep attention to the fundamentals and a unique and valuable discussion of the implementation of Doublet Lattice aerodynamics are special features of the book. The author also ranges over a number of additional topics including current and promising aircraft and wing concepts that bring new challenges to the aeroelastician. The student new to the topic as well as the experienced practitioner will find much to ponder and benefit from a careful reading of this text.”
(Prof. Earl Dowell, Duke University)
“Doublet Lattice Method is one of the key ingredients of the aeroelastic assessment of the early aircraft design phases. It is based on the acceleration potential, a topic usually not covered in detail in commonly published literature and academic textbooks. Introduction to Unsteady Aerodynamics and Dynamic Aeroelasticity addresses this need. The book also shows how the Doublet Lattice Method is practically implemented in a commercial code and how it is integrated in an aeroelastic solver. Particularly interesting are the theoretical comparisons between the k, k-E, p-k, non-iterative p-k, first order g, second-order g, p, p-p, p-L, GAMM, and CV methods for the determination of the flutter point. On engineering applications, the book covers how the design parameters determine a change of the instability mechanism, from the body freedom flutter to cantilever flutter.”
(Dale Pitt, Technical Fellow at the Boeing Company (retired), Aeroelasticity/Flutter Consultant)
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