Optimal method of deicing mode based on combined shear stress of piezoelectric sheet excitation and lamb wave

A piezoelectric sheet and shear stress technology, which is applied in the field of combined shear stress deicing based on piezoelectric sheet excitation and Lamb wave, can solve the problems of aircraft crashes, aircraft lift performance reduction, wing and fuselage vibration and noise and other issues, to achieve the effect of broad application prospects, high reliability, and low power consumption

Active Publication Date: 2022-06-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0002] When the aircraft encounters a cloud layer containing supercooled water droplets during flight, the leading edge of the wing on the body will freeze. aircraft flight safety
If reasonable and effective deicing measures are not taken for icing, it will not only reduce the lift performance of the aircraft and increase fuel consumption, but also may cause vibration and noise on the wings and fuselage, which will affect the passenger experience and even cause aircraft crashes. serious consequences of death

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  • Optimal method of deicing mode based on combined shear stress of piezoelectric sheet excitation and lamb wave
  • Optimal method of deicing mode based on combined shear stress of piezoelectric sheet excitation and lamb wave
  • Optimal method of deicing mode based on combined shear stress of piezoelectric sheet excitation and lamb wave

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[0028] In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

[0029] Since the adhesion normal stress between the wing and the ice accretion is greater than the adhesion shear stress, it is of great benefit to aircraft deicing from the point of view of the adhesion shear stress. Lamb waves can excite normal stress and shear stress on the wing, that is, out-of-plane displacement and in-plane displacement can be generated on the surface of the wing, and the in-plane displacement plays a major role in the deicing process. The application of wing anti-icing has obvious advantages. At the same time, the ultrasonic guided wave anti-icing technology also has the advantages of low power consumption, low cost, light weight, simpl...

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Abstract

The present invention provides an optimal method based on piezoelectric sheet excitation and Lamb wave combined shear stress deicing mode, selects piezoelectric sheet as the driver, and analyzes the impact of piezoelectric sheet excitation frequency on the shear stress between the input aluminum plate-ice layer interface Influence, combined with the frequency response curve of the selected modal of Lamb wave deicing and the strain on the surface of the aluminum plate, finally complete the optimization of the combined shear stress deicing mode of piezoelectric plate excitation and Lamb wave; the present invention aims to give In the case of constant power, the maximum deicing shear stress that may be obtained under the given power is stimulated to overcome the adhesive shear stress between the ice and the substrate, and finally achieve the purpose of deicing; the present invention has low power consumption, low cost It has the advantages of low weight, light weight and high reliability, and has broad application prospects, especially for deicing aircraft wing components.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic guided wave anti-icing and deicing, and in particular relates to an optimal method for deicing based on combined shear stress of piezoelectric sheet excitation and Lamb wave. Background technique [0002] When the aircraft encounters a cloud layer containing supercooled water droplets during flight, the leading edge of the wing on the body will freeze. the flight safety of the aircraft. Failure to take reasonable and effective de-icing measures for icing will not only reduce the lift performance of the aircraft and increase fuel consumption, but may also cause vibration and noise on the wings and fuselage, which will affect the passenger experience and even cause the aircraft to crash. serious consequences of death. [0003] Therefore, the effective removal of aircraft icing is a necessary guarantee for the safe flight of aircraft, and it is of great significance to develop a deicing system w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/20G06F119/14
CPCG06F30/15G06F30/20G06F2119/14
Inventor 于全朋周世圆姚鹏娇胡晓丹赵明华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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