Measurements of Unsteady Aeroelastic Model Deformation by Stereo Photogrammetry

Schairer, Edward T.; Hand, Lawrence

doi:10.2514/2.2545

Cited by 30 publications

(20 citation statements)

References 8 publications

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“…This nonlinear aerodynamic flow mechanism has also been studied by Mook and colleagues, e.g. Preidikman et al [82] at low Mach numbers in a series of papers. As Gordnier and Mook note nonlinear vortex flow phenomena may be important when structural nonlinearities are weaker and the corresponding structural motions greater.…”

Section: Delta Wings With Geometrical Plate Nonlinearitiesmentioning

confidence: 91%

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Dowell

2015

A Modern Course in Aeroelasticity

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Section: Delta Wings With Geometrical Plate Nonlinearitiesmentioning

confidence: 91%

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Dowell

2015

A Modern Course in Aeroelasticity

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“…The accuracy of ROM-PMS was also proven in (Zhang et al, 2015a). In addition, the flutter dynamic pressure of linearized aerodynamic method is listed in Table3 marked by p-k method (Schairer and Hand, 1999). Because of the transonic feature, linearized method cannot obtain accurate result.…”

Section: Accuracy Test Of Reduced Order Modelmentioning

confidence: 94%

“…To keep consistent with experiment, psi (1.0 psi=6895.0 Pa) is applied in Table 3 as the unit of dynamic pressure. 2.458 p-k (Schairer and Hand, 1999) 2.750 Experiment (GORDNIER and MELVILLE, 2001;Schairer and Hand, 1999) 2.400…”

Section: Accuracy Test Of Reduced Order Modelmentioning

confidence: 99%

A novel unsteady aerodynamic Reduced-Order Modeling method for transonic aeroelastic optimization

Wang

Zhang

et al. 2018

Journal of Fluids and Structures

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In aircraft design, structural optimization and uncertainty quantification concerning transonic aeroelastic issues are computationally impractical, because the iterative process requires great number of aeroelastic analysis. Emerging Reduced-Order Model (ROM) method is convenient for transonic aeroelastic analysis. However, current ROMs cannot be reused during iteration, thus time cost is still way too large. This study proposed an improved ROM suitable for Arbitrary Mode Shapes (ROM-AMS), which is reusable regardless the variation of design variables. By adopting Principal Component Analysis, ROM-AMS method can significantly reduce the number of basis mode shapes and improve the accuracy of flutter analysis. In an optimization case, the weight of cropped delta wing is reduced by 28.46%, and the efficiency is 900 times higher than traditional ROM method, which demonstrates the feasibility of this method in iterative design process.

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“…Since these results are well documented elsewhere, see Dowell and Tang [71], here the recent work of Gordnier et al [72,73] that has extended these correlations into the transonic range for a cropped delta wing planform is emphasized. This configuration had been investigated experimentally by Schairer and Hand [74] and the theoretical calculations were done by Gordnier et al using both Euler and Navier-Stokes flow models. Initially the theoretical calculations were done using a linear structural model, which gave predicted LCO amplitudes much greater than those observed experimentally.…”

Section:  Delta Wings With Geometrical Plate Nonlinearitiesmentioning

confidence: 99%

Some Recent Advances in Nonlinear Aeroelasticity: Fluid-Structure Interaction in the 21st Century

Dowell¹

2010

51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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Aeroelasticity is the field that examines, models and seeks to understand the interaction of the forces from an aerodynamic flow and the deformation of an elastic structure. The forces produce deformation, but the structural deformation in turn changes the aerodynamic forces. This feedback between force and deformation leads to a variety of dynamic responses of the fluid and the structure including flutter (a Hopf bifurcation), limit cycle oscillations and sometimes chaos. Selected recent advances in nonlinear aeroelasticity and fluidstructure interaction are reviewed to identify and model the fundamental elements that they share. Topics discussed include the following.

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Measurements of Unsteady Aeroelastic Model Deformation by Stereo Photogrammetry

Cited by 30 publications

References 8 publications

Untitled

Untitled

A novel unsteady aerodynamic Reduced-Order Modeling method for transonic aeroelastic optimization

Some Recent Advances in Nonlinear Aeroelasticity: Fluid-Structure Interaction in the 21st Century

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