A Modern Course in Aeroelasticity

Dowell, Earl H.

doi:10.1007/978-3-319-09453-3

Cited by 133 publications

(135 citation statements)

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“…The flutter pressure -pressure on upper surface of the plate while the lower surface has static pressure -due to a supersonic flow (highly unsteady) is introduced by Piston theory [18] P (x, y, t)…”

Section: Figmentioning

confidence: 99%

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Flutter Analysis of Composite Laminates With Curvilinear Fibres

Akhavan¹,

Ribeiro²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. In this investigation, the authors intend to study the dynamic instability (flutter) of variable stiffness composite laminates (VSCLs) in the presence of supersonic flow. In the type of VSCL considered here, plies have curvilinear fibres and, consequently, the stiffness is variable in a macroscopic view. The plates considered are rectangular. In each ply, a reference fibre path, represented by a function of horizontal coordinate x, is defined. The reference fibre path orientation changes linearly from T 0 at the centre to T 1 at both vertical edges of the ply; the other fibre paths are defined shifting the reference path in direction y. The displacement and rotations are defined using a Third-order Shear Deformation Theory, and then they are discretised by a p-version finite element model that applies to VSCL plates. Piston theory is employed to model the aerodynamic force of the upstream flow in direction x. Flutter airspeeds are investigated for VSCL plates with different fibre angles. Changes of flutter speed are evaluated in two different regimes of steady and unsteady flow.

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Section: Figmentioning

confidence: 99%

“…The plate is in the presence of a supersonic flow. To model the aerodynamic force of the upstream flow, Piston theory [18] is employed. The equations of motion, in the form of an eigenvalue problem, are solved to find the flutter speed.…”

Section: Introductionmentioning

confidence: 99%

Flutter Analysis of Composite Laminates With Curvilinear Fibres

Akhavan¹,

Ribeiro²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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show abstract

“…The formation and shedding of these vortex pairs produces alternating pressures on each side of the body (Dowell, et al, 1995). The pressures, and resultant forces, act normal to the body surface with a frequency equal to that of the vortex shedding from one side of the cylinder.…”

Section: Characteristics Of Bluff Body Flowmentioning

confidence: 99%

“…If the body is elastically supported, the alternating pressure and the fluid-structure interaction result in, predominately, cross-flow vibrations. The vortex shedding may also excite alongflow motions as well as torsion, galloping and flutter, depending on the degrees of freedom available to the body (Dowell, et al, 1995), the shape of the body, the Reynolds number associated with the flow, and the ratio of the Strouhal frequency to the natural body frequency (Naudascher and Rockwell, 1994).…”

Section: Characteristics Of Bluff Body Flowmentioning

confidence: 99%