Control reversal and torsional divergence analysis for a high-aspect-ratio wing

Yoon, NamKyung; Chung, Chanhoon; Na, Young-Ho; Shin, SangJoon

doi:10.1007/s12206-012-0889-2

Cited by 8 publications

(6 citation statements)

References 12 publications

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“…Badir et al [8] and Volovoi and Hodges [9] further improved the analysis method for the thin-walled beam model established by Berdichevsky et al Rehfield et al [10,11] constructed a thin-walled beam theory based on Timoshenko beams and applied this theory to study the aerodynamic cutting of bending-twisting coupling blades. Moreover, many scholars [12][13][14] combined the variational method with the Timoshenko theory to establish a more efficient analysis model of thin-walled beams.…”

Section: Introductionmentioning

confidence: 99%

Solution to bending problem of trapezoid composite laminates

Cui

Zhou

et al. 2020

Mathematics and Mechanics of Solids

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The optimized design of composite adaptive structures puts forward higher requirements and challenges to the actual configuration of the structural section. In this paper, a trapezoidal laminate model of composite materials is established. Based on the classical laminates theory, the bending problem of trapezoidal laminates is solved by using the Kantorovich method and the principle of minimum potential energy. The analytic form of the solution is found to satisfy the Euler equation and displacement boundary conditions. Taking the wing of a jet transport aircraft as an example, the accuracy of the analytical solution is verified by the finite element method. The Differential Evolution algorithm is used to realize the multi-objective optimal design of the bending–twisting coupled trapezoidal laminates, and the hygrothermal stability of laminates is verified by the finite element method. Finally, based on the Monte Carlo method, the robustness analysis of the bending–twisting coupling effect of laminate is realized; meanwhile the feasibility and reliability of the design scheme are verified. The stress and strain functions at each point of the trapezoidal laminate can be further obtained by the analytical solution, making it more convenient to analyze the stresses and calculate the static forces of the trapezoidal laminate and its composite structures, which is of great significance to effectively improve the comprehensive mechanical properties of the cross-section structure of composite materials.

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Section: Introductionmentioning

confidence: 99%

Solution to bending problem of trapezoid composite laminates

Cui

Zhou

et al. 2020

Mathematics and Mechanics of Solids

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“…Aerospace engineering is the first field where aerodynamic and aeroelasticity disciplines are of great interest, given the need for guaranteeing the appropriate behavior of the vehicle under any circumstance and the convenience of elaborating designs that avoid aircraft instabilities or undesired responses. Thus, several studies on wind-induced phenomena such as flutter [3,4], torsional divergence [5,6], and vortex shedding [7,8] can be found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational studies on the performance of solar trackers under vortex shedding, torsional divergence, and flutter

Quintela¹,

Jurado²,

Rapela³

et al. 2020

Int. J. CMEM

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The current development of renewable energies has originated a number of new structural typologies that are the physical support of the energy production systems. Photovoltaic energy is a very mature source and it is obtained using rows of panels implemented in a longitudinal grillage. Many studies have been carried out in the past with an aim to improve the capacity to obtain electrical power, but another important issue is the need to guarantee the performance of these industrial facilities under the phenomena induced by the turbulent wind flow, taking into account the fact that they are usually built in wide open spaces. This paper describes an extensive research carried out on two configurations of solar trackers by experimental and computational methods. The former was composed of a number of tests of reduced models of segments of the solar trackers, which were carried out in an aerodynamic wind tunnel. The latter consisted of a series of structural analyses worked out through a finite element model of the full panel subjected to aerodynamic and aeroelastic loads. Several angles of attack of the wind flow and a wide range of wind speeds were included in the study. This approach allowed to clearly evaluate the structural and dynamic performance of both the configurations of solar trackers under the most important wind-induced phenomena such as vortex shedding, torsional divergence, and flutter. The paper relates the phases of the study and informs about the more relevant numerical results obtained in the experiments and the computer analysis.

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“…Thus, the structural analysis of large aspect ratio wing is a problem of small strain with large displacement. Under the loading, the configuration of nonlinear structure is changed, 8 so the reference configuration is constructed. There are two methods for geometrical nonlinear problems based on the differences of reference configuration.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, aeroelasticity is a typical fluid–structure interaction (FSI) problem. 14,15 The data transfer methods must be considered in FSI problem, 4–12 including message transfer from fluid to structure and from structure to fluid. Various literatures have focused their studies on this case.…”

Section: Introductionmentioning

confidence: 99%

The aeroelastic characteristics of high aspect ratio wing

Yang

Yue

2016

Proceedings of the Institution of Mechanical Engineers, Part G:

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Owing to the elasticity, the large deformation was brought in the high aspect ratio wing in the flight. The large deformation had a great influence on the flight performance. In this paper, the loosely coupled method was used for the research of high aspect ratio wing aeroelastic problems. The Navier–Stokes equations were solved for fluid domain computation, and the nonlinear finite element method was adopted for solid domain computation. The data exchange program and mesh regeneration progress were adopted for fluid–structure interface problem. Finally, the aerodynamic characteristics of high aspect ratio wing were obtained under different fly conditions. In addition, to validate the proposed method, the flutter analysis of AGARD 445.6 wing is carried out and compared with the experimental data. The numerical result validates the proposed computational fluid dynamics/computational structural mechanics method.

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Control reversal and torsional divergence analysis for a high-aspect-ratio wing

Cited by 8 publications

References 12 publications

Solution to bending problem of trapezoid composite laminates

Solution to bending problem of trapezoid composite laminates

Experimental and computational studies on the performance of solar trackers under vortex shedding, torsional divergence, and flutter

The aeroelastic characteristics of high aspect ratio wing

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