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Introduction
Published in Rama B. Bhat, Principles of Aeroelasticity, 2018
Aeroelasticity is the study of the effect of aerodynamic forces on elastic bodies. In the area of elasticity or vibrations, the loads are assumed to be unaffected by the deformation or motion of the structure. However, the aerodynamic forces depend critically on the attitude of the body relative to the flow. The elastic deformation plays an important role in determining the external loading itself.
Single Degree-of-Freedom Undamped Vibration
Published in Haym Benaroya, Mark Nagurka, Seon Han, Mechanical Vibration, 2017
Haym Benaroya, Mark Nagurka, Seon Han
Aeroelasticity is the science which studies the interaction among inertial, elastic, and aerodynamic forces. Aeroelastic phenomena arise when structural deformations induce changes in aerodynamic forces. In dimensional analysis, the Strouhal number St is a dimensionless number describing oscillating flow mechanisms. It is often given as
Aeroelastic flutter behaviour of beam: effect of graded GPL and porosity
Published in Mechanics Based Design of Structures and Machines, 2022
Gourav Kotriwar, Jeyaraj Pitchaimani
Aeroelasticity is a branch that studies the influence of aerodynamic forces that act on aircraft structures during its flight. Flutter is a condition where structure executes self-excited vibrations under the influence of aerodynamic, inertia and elastic forces. Flutter induces fatigue damage to the structure and culminates into catastrophic failure. Flutter instability risks the safety of aircraft structures and their flight performance; hence it becomes very important to do investigation of aeroelastic flutter in airplane structures. Zhou, Wang, and Zhang (2021) studied the flutter and vibration characteristics of GPL-reinforced functionally graded porous cylindrical-shaped panels subjected to supersonic flow. Saidi, Bahaadini, and Majidi-Mozafari (2019) performed aeroelastic analysis of the smart porous plates under the influence of supersonic flow. Aditya et al. (2020) studied flutter behavior of 2-D curved porous panels reinforced with GPLs using FEM. Huang et al. (2020) investigated aeroelastic flutter behaviors of GPL embedded quadrilateral shaped laminated composite plates. Ganapathi et al. (2022) studied flutter characteristics of variable stiffness laminated panels using the finite element method considering the nonlinear effect.
Aerodynamic performance enhancement and computational methods for H-Darrieus vertical axis wind turbines: Review
Published in International Journal of Green Energy, 2022
Temesgen Abriham Miliket, Mesfin Belayneh Ageze, Muluken Temesgen Tigabu
The concept of aeroelasticity is a developed tool in the aviation industry since 1947 as introduced by A.R. Collar, and its application for wind turbine design and analysis begins as late as 1976 by Friedmann (Friedmann 1976). However, its application in VAWT simulation is very limited. Aeroelasticity study the fluid-structure interaction interactions of a flexible and moving body. In classical aeroelastic methods, the fluid and structure interaction is treated separately and uncoupled, ignoring the interaction among these domains (Marshall and Imregun 1996). As the computing power improved, several integrated approaches developed including inherent fluid-structure coupling. As the fidelity requirement of the analysis increases to include explicit details such as turbulence and wave loadings (Owens, Griffith, and Murray 2014), nonlinear composite layered blades, and large deformation (Owens and Griffith), the application of strong fluid-structure coupling is necessary. However, on the contrary, computational efficiency with small compromise on accuracy is also another route of coupling demands, such as introducing a reduced-order model (Ferrari 2012).