Nonlinear FE aeroelastic analysis of membrane airfoils with fixed and elastic supports

Hussein, Omar S.

doi:10.1016/j.tws.2023.110544

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…The dynamic properties of beams reinforced with 3D graphene foams (3D-GFs) with elastic boundary conditions were investigated considering four porosity distributions along the thickness direction [33], which are nonuniform multi-span functionally graded (FG). A nonlinear aeroelastic analysis of membrane airfoils [34], including static and dynamic responses, is performed to reveal the effect of the elastic supports and their stiffness ratio on the aeroelastic properties. According to the above findings, elastic supports can be regarded as boundary conditions for engineering structures, which can affect the dynamic characteristics, including modal modes and frequencies.…”

Section: Introductionmentioning

confidence: 99%

Adaptive beam with elastic support based on magnetorheological elastomers for modal modulation and vibration suppression

Wang,

Zhang,

Ding

et al. 2024

Smart Mater. Struct.

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Owing to the wide modulation capability of their magneto-induced modulus, smart structure-based magnetorheological elastomers (MREs) show great promise for vibration control in numerous engineering applications. In conventional smart structure-based MREs, however, vibration absorption or isolation is mainly used for discrete structural systems, and the requirement for vibration control in continuous structures can limit the application of vibration absorbers and isolators. Therefore, it is necessary to resolve the dynamic properties of the continuous structure to obtain modal information. In this paper, different types of smart beams with adaptive elastic support (AES)-based MREs, containing dual-end elastic support, single-end elastic support, and the combination of a fixed end and an AES at an arbitrary location, are developed to tactically influence the dynamics through magneto-mechanical coupling. A dynamic model of thin-walled beams with AES was established by using the improved Fourier series method (IFSM). The numerical results confirm that the effective suppression bandwidth of the beam with MRE-AES can be shifted as a result of the modal modulation-induced energy transfer from low to high frequencies, which requires a decreasing trend of modal amplitude at the response location as the elastic support stiffness increases. According to the modal analysis, the beams with single-end AES and dual-end AES have a decreasing trend of modal amplitude in the global location as stiffness increases. However, the modal amplitude trend of the beam with a fixed end and an AES is not monotonic at certain locations. The experimental results demonstrate that MRE-AES can effectively attenuate the acceleration responses of the beams with single-end AES and with a fixed end and an AES under harmonic excitation. The resonance peaks in the transmission remarkably shift to higher frequencies with increasing magnetic flux.

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Section: Introductionmentioning

confidence: 99%

Adaptive beam with elastic support based on magnetorheological elastomers for modal modulation and vibration suppression

Wang,

Zhang,

Ding

et al. 2024

Smart Mater. Struct.

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Aeroelastic analysis of membrane airfoils and flexible-chord airfoils with trailing-edge flaps

Hussein

2023

Acta Mech

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This paper studies the static and dynamic aeroelastic characteristics of membrane airfoils and flexible-chord airfoils (deformable airfoils) with the emphasis on the effects of a trailing-edge (TE) flap which is a novel topic. Two modeling approaches are presented; the first method is the Rayleigh–Ritz method, and the second method is the finite element method which is an efficient method to study the TE flap effects. The two models are presented in the Laplace domain which enables the transient response analysis. The models adopt the potential flow aerodynamics based on the Prandtl–Glauert thin-airfoil theory and the Theodorsen’s unsteady theory. The airfoils are assumed to have small deformations, so linear structural models are used. The effect of the airfoils’ flexibilities on the static aeroelastic characteristics and the dynamic responses due to step and harmonic TE flap inputs is presented through a parametric study.

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Nonlinear FE aeroelastic analysis of membrane airfoils with fixed and elastic supports

Cited by 2 publications

References 20 publications

Adaptive beam with elastic support based on magnetorheological elastomers for modal modulation and vibration suppression

Adaptive beam with elastic support based on magnetorheological elastomers for modal modulation and vibration suppression

Aeroelastic analysis of membrane airfoils and flexible-chord airfoils with trailing-edge flaps

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