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Acoustic liner design method, device and equipment and storage medium

A design method and technology of acoustic lining, applied in equipment and storage medium, acoustic lining design method, device field, can solve problems such as lack of design means

Pending Publication Date: 2021-01-12
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of the design of the geometric parameters of the nacelle acoustic lining directly facing the complex profile, the existing technology still lacks efficient design means

Method used

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  • Acoustic liner design method, device and equipment and storage medium
  • Acoustic liner design method, device and equipment and storage medium
  • Acoustic liner design method, device and equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] figure 1 It is a flow chart of an acoustic lining design method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of designing the geometric parameters of the aircraft nacelle acoustic lining. This method can be executed by the acoustic lining design device, specifically Including the following steps:

[0048] Step 110, according to the value range and sampling interval of the acoustic lining geometric parameter, select the sample value of the acoustic lining geometric parameter.

[0049] Wherein, the value range and sampling interval can be determined according to experience or design requirements. The acoustic lining may be an acoustic lining in an aircraft nacelle. Exemplary, Figure 2a It is a structural schematic diagram of a kind of aircraft nacelle air inlet in the present embodiment, as Figure 2a As shown, the acoustic lining structure adopts a single-layer acoustic lining structure. Figure 2b It is a schemati...

Embodiment 2

[0071] Figure 5 It is a structural schematic diagram of an acoustic lining design device provided in Embodiment 2 of the present invention. Such as Figure 5 As shown, the device includes: sample value selection module 210, acoustic impedance value acquisition module 220, sound propagation grid acquisition module 230, sound pressure determination module 240, noise loss determination module 250, next generation sample value generation module 260 and target acoustic Lining geometry parameter determination module 270.

[0072] The sample value selection module 210 is used to select the sample value of the acoustic lining geometric parameter according to the value range and sampling interval of the acoustic lining geometric parameter;

[0073] The acoustic impedance value acquisition module 220 is used to input the sample value into the set acoustic impedance model to obtain the acoustic impedance value;

[0074] Acoustic propagation grid acquisition module 230, configured to ...

Embodiment 3

[0095] Image 6 It is a schematic structural diagram of a computer device provided by Embodiment 3 of the present invention. Image 6 A block diagram of a computer device 312 suitable for implementing embodiments of the invention is shown. Image 6 The computer device 312 shown is only an example, and should not impose any limitation on the functions and scope of use of the embodiments of the present invention. Device 312 is a typical acoustic lining design functional computing device.

[0096] Such as Image 6 As shown, computer device 312 takes the form of a general-purpose computing device. Components of computer device 312 may include, but are not limited to: one or more processors 316, storage 328, bus 318 connecting various system components including storage 328 and processor 316.

[0097] Bus 318 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a l...

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Abstract

The embodiment of the invention discloses an acoustic liner design method, device and equipment and a storage medium. The method comprises the following steps: selecting sample values of acoustic liner geometrical parameters according to a value range and a sampling interval of the acoustic liner geometrical parameters; inputting the sample values into a set acoustic impedance model to obtain an acoustic impedance value; carrying out parametric modeling on the nacelle inner and outer molded surfaces containing the acoustic liner to obtain an acoustic propagation grid; determining the sound pressure of each monitoring point based on the acoustic propagation grid and the acoustic impedance value; determining noise loss based on the sound pressure of each monitoring point, and judging whetherthe noise loss meets a set condition or not; if not, generating a sample value of the geometrical parameter of the next generation of acoustic liner, and returning to execute the operation of inputting the sample values into the set acoustic impedance model to obtain the acoustic impedance value until the noise loss meets the set condition; and determining the sample value corresponding to the noise loss meeting the set condition as the target acoustic liner geometric parameter. The determination process of the geometric parameters of the nacelle acoustic liner can be simplified.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of nacelle acoustic lining design, in particular to an acoustic lining design method, device, equipment and storage medium. Background technique [0002] The problem of civil aircraft engine noise presents an important issue for the continuously growing air transport industry. The engine noise level is directly related to the acquisition of the engine airworthiness visa. This is undoubtedly a huge challenge for the civil aviation engine being developed in our country. The noise level of large civil aircraft is one of the important contents of airworthiness certification, and the noise certification standards are constantly changing with time. [0003] Fan noise is the main sound source of modern civil aeroengines during takeoff and landing. Since the appearance of jet aircraft engine, acoustic lining has been the most important means of engine noise control. In recent years, with th...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/20G06F119/10
CPCG06F30/15G06F30/20G06F2119/10Y02T90/00
Inventor 张涛林大楷张颖哲陈超陈哲
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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