Aeroelastic Damping Estimation for a Flexible High-Aspect-Ratio Wing

Tsatsas, Ilias; Pontillo, Alessandro; Lone, Mudassir

doi:10.1061/(asce)as.1943-5525.0001390

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…In flexible torsional motion, on the other hand, thrust increases significantly. Calculation studies are relatively few, but there are still some outstanding studies on the aeroelasticity calculation of flapping wing [3][4][5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic CFD/CSD Coupling Research for Flexible Micro Aircraft

Chen

Yang

2023

J. Phys.: Conf. Ser.

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Bio-inspired flapping wing aircraft have made progress in recent years. Flying birds can fly in various low Reynolds numbers (103-105) with high flight stability and maneuvering ability by use of the flexible deformation of skeletal muscle structures or thin-film structure wings. Early studies mainly focused on the aerodynamics and kinematics of the flapping wings, with relatively little research on the flexible structure, and the aerodynamic structure coupling characteristics of micro flappings are still unclear. At present, the focus of research is to evaluate the impact of structural deformation on the aerodynamic characteristics of flexible micro-flapping wing. A CFD/CSD coupling solver are developed and several technical challenges related to the CFD/CSD interface are resolved in this study (CFD/CSD data exchange method and moving mesh generation). The aerodynamic characteristics of five flexible wings with different structural parameters are calculated and compared. The results show that structural parameters play an important role in aerodynamic performance, which also indicates that the potential aerodynamic performance can be improved by the optimal structural design.

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Section: Introductionmentioning

confidence: 99%

Dynamic CFD/CSD Coupling Research for Flexible Micro Aircraft

Chen

Yang

2023

J. Phys.: Conf. Ser.

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“…This can be achieved with Operational Modal Analysis (OMA) [23]. OMA allows for the collection of experimental data during the operational life of a structure and allows us to obtain modal parameters [24] that can be either used for direct or model-based damage assessment. In particular, such model-based approaches can be used not only to obtain information about the health of the structure, but also of its new dynamics, such as aeroelastic onset speeds [25].…”

Section: Introductionmentioning

confidence: 99%

“…Modal parameters identification was carried out with a single method, as it is customary for vibration testing campaigns [34], and because it was shown, for a related structure [24], that the modal parameters are independent of the technique used. The method selected is a frequency domain implementation of the industry standard method LSCE [35].…”

Section: Introductionmentioning

confidence: 99%

Ground Vibration Testing of a Flexible Wing: A Benchmark and Case Study

et al. 2022

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Beam-like flexible structures are of interest in many fields of engineering, particularly aeronautics, where wings are frequently modelled and represented as such. Experimental modal analysis is commonly used to characterise the wing’s dynamical response. However, unlike other flexible structure applications, no benchmark problems involving high-aspect-ratio flexible wings have appeared in the open literature. To address this, this paper reports on ground vibration testing results for a flexible wing and its sub-assembly and parts. The experimental data can be used as a benchmark and are available to the aeronautical and structural dynamics community. Furthermore, non-linearities in the structure, where present, were detected. Tests were performed on the whole wing as well as parts and sub-assembly, providing four specimens. These were excited with random vibration at three different amplitudes from a shaker table. The modal properties of a very flexible high-aspect-ratio wing model, its sub-assembly and parts, were extracted, non-linear behaviour was detected and the experimental data are shared in an open repository.

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