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Wallboard aeroelasticity stability analysis method considering hybrid uncertainty

A technology of aeroelasticity and analysis methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low computational efficiency and difficulty in obtaining the probability density function of the boundary of the eigenvalue interval.

Active Publication Date: 2019-06-25
BEIHANG UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: Aiming at the low calculation efficiency of the traditional analysis method for dealing with the aeroelastic stability of the panel with mixed uncertain parameters, and the difficulty in obtaining the probability density function of the boundary of the eigenvalue interval, a method considering mixed uncertainties is proposed. Analytical method for aeroelastic stability of wall panels

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  • Wallboard aeroelasticity stability analysis method considering hybrid uncertainty
  • Wallboard aeroelasticity stability analysis method considering hybrid uncertainty
  • Wallboard aeroelasticity stability analysis method considering hybrid uncertainty

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Embodiment Construction

[0060] Hereinafter, design examples of the present invention will be described in detail with reference to the accompanying drawings. The present invention belongs to the field of aeroelastic design of wall panels. It should be understood that the selected examples are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0061] (1) Taking the two-dimensional curved panel structure as the object, its geometric model is as follows figure 1 shown;

[0062] (2) Given the material property parameters and incoming flow parameters of the curved panel structural unit, as shown in Table 1;

[0063] Table 1 Material properties and flow parameters of curved panel structure

[0064]

[0065] In Table 1, E is the modulus of elasticity, ρ ∞ is the flow density, ρ s is the density of the curved panel, α s is the coefficient of thermal expansion;

[0066] (3) For the random variable α in Table 1 sto , obey the normal dis...

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Abstract

The invention discloses a wallboard aeroelasticity stability analysis method considering hybrid uncertainty, and belongs to the field of aeroelasticity design of wallboards, and aims to quantitativelycharacterize uncertain mixing parameters by using a random model and an interval model in allusion to an uncertain mixing environment where random variables and interval variables coexist so as to establish an aeroelasticity stability analysis model for the wallboard containing the uncertain mixing parameters. On the basis, a probability density evolution method and an interval uncertainty propagation analysis method are combined, and a random-interval uncertainty propagation analysis method is provided. According to the interval mixing probability density evolution method, the probability statistical characteristics of the wall plate aeroelasticity response interval boundary can be estimated when the parameter fluctuation is large, the limitation of a traditional method on calculation efficiency and applicability is overcome, and the research blank of wall plate aeroelasticity stability analysis under the mixed uncertain environment is filled.

Description

technical field [0001] The invention belongs to the field of aeroelastic design of wall panels, in particular to an analysis method for aeroelastic stability of wall panels considering mixed uncertainty. Background technique [0002] Aeroelasticity has three remarkable characteristics. First, it is essentially a fluid-solid coupling problem. The structure undergoes elastic deformation under the action of aerodynamic force, and at the same time, the structural deformation changes the boundary of the flow field in turn; the second is the nonlinearity involved. There are many factors, including structural and aerodynamic nonlinear factors, such as the gap nonlinearity at the control surface hinge and the aerodynamic nonlinearity caused by high angle of attack flight; in addition, since the aeroelastic system is a complex multidisciplinary , structure, heat and other disciplines, there are inevitably uncertain factors in the actual aeroelastic system. For the actual wall panel ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 邱志平郑宇宁王晓军王磊李云龙
Owner BEIHANG UNIV
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