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Honeycomb structure with adjustable sound absorption performance and design method thereof

A honeycomb structure, adjustable technology, applied in computing, special data processing applications, instruments, etc., can solve the problem that the noise environment cannot play a good role in targeting, and achieve the effect of easy engineering and wide application prospects.

Pending Publication Date: 2019-11-08
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing structure generally adds a micro-perforated plate structure to the honeycomb structure, endowing the overall structure with a relatively fixed sound absorption performance, which cannot play a good role in targeting the changing external noise environment.

Method used

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  • Honeycomb structure with adjustable sound absorption performance and design method thereof
  • Honeycomb structure with adjustable sound absorption performance and design method thereof
  • Honeycomb structure with adjustable sound absorption performance and design method thereof

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings. see Figure 2 to Figure 9 .

[0049] In order to obtain better sound absorption characteristics of the honeycomb sandwich structure, the present invention considers making the upper surface plate into a micro-perforated plate, such as figure 2 shown.

[0050] in such as figure 2 Take out a honeycomb core 9 in the shown honeycomb sandwich structure, and add a piece of honeycomb core 9 inside Figure 5 As shown in the micro-perforated plate 3 in the core, one side of the surface of the micro-perforated plate 3 in the core is closely mounted as follows Figure 6a The fixed plate 4, the central position of the fixed plate is installed with two symmetrically distributed such as Figure 6b The electro-induced SMP drive arm 5, the free ends of the drive arm are respectively symmetrically installed as Figure 6c The adjustable sound-absorbing baffle6. The electro-SMP dr...

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Abstract

The invention designs a honeycomb structure with adjustable sound absorption performance based on a composite material honeycomb plate structure. The design steps are as follows: calculating accordingto a theoretical model of a double-layer micro-perforated plate to obtain the influence of the perforation rate on the sound absorption performance of the structure; according to the shape memory polymer composite material driving arm, the position of an adjusting plate can be changed by controlling external voltage. And a perforation rate adjusting range suitable for adjustment is found out through numerical simulation and calculation. The design method is simple in principle, and the characteristic that the sound absorption peak value can be adjusted only by partially adding the structure to a traditional honeycomb structure is achieved. Practicability is high, and operation and popularization are easy.

Description

technical field [0001] The invention belongs to a low-noise design method for honeycomb structure design, in particular to a honeycomb structure with adjustable sound absorption performance and a design method thereof. Background technique [0002] Honeycomb sandwich structure is a commonly used engineering structure with sound insulation characteristics and good mechanical properties. In order to achieve the integrated design of sound absorption and insulation, the traditional honeycomb sandwich structure generally uses additional porous materials for the purpose of sound absorption, and the structural weight of porous sound-absorbing materials is too large, which will bring additional damage to the aviation and construction fields. adverse effects. Therefore, it is of great significance to study the low-noise design method of the honeycomb sandwich structure under the premise of maintaining light weight for the study of vibration and noise reduction of the honeycomb sandw...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张翔吴锦武
Owner NANCHANG HANGKONG UNIVERSITY
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