Optimal selection method based on piezoelectric patch excitation and Lamb wave combined shear stress deicing mode

Abstract

The invention provides a piezoelectric patch excitation and Lamb wave combined shear stress deicing mode-based optimal selection method, which comprises the following steps of: selecting a piezoelectric patch as a driver, analyzing the influence of the excitation frequency of the piezoelectric patch on shear stress between ice layer interfaces of an input aluminum plate, and selecting a Lamb wavedeicing mode to be selected and a frequency response curve of strain on the upper surface of the aluminum plate; and finally, piezoelectric patch excitation and Lamb wave combined shear stress deicingmode optimization is completed. Under the condition of given power, the maximum deicing shear stress possibly obtained under the given power is excited, so that the adhesion shear stress between iceand a substrate is overcome, and finally the deicing purpose is achieved. The deicing device has the advantages of low power consumption, low cost, light weight, high reliability and the like, has a wide application prospect, and is particularly suitable for deicing aircraft wing parts.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic guided wave anti-icing, and in particular relates to an optimal method based on piezoelectric plate excitation and Lamb wave combined shear stress deicing mode. 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. 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. [0003] Therefore, effective deicing of aircraft is a necessary guarantee for safe flight of aircraft, and it is of great significance to develop a deicing system with low power consumption, light weight ...

AI Technical Summary

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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