吸声结构

有限元法研究结果表明：有限元分析软件ANSYS用于木质穿孔板吸声结构的吸声性能分析效果显著。

The results of the finite-element method show that the effect of application of the finite-element analysis software ANSYS to wooden sound structure absorption performance analysis is obvious .

研究了飞机APU排气噪声的降噪设计，建立了排气管道的微穿孔板吸声结构几何参数、气流参数等与吸声特性参数之间的关联关系，发展了排气管道微穿孔板吸声结构的理论设计方法。

Based on this theoretical formula , a micro perforated absorber used to reduce ex-haust noise of flow duct was designed and was used in the noise reduction for the airplane MA60 APU .

为了节省材料，选择了平板尖劈平行通道型吸声结构，它的总长是20cm和15cm（过渡部分分别为15cm和10cm）。

Rib structures with parallel channel with total lengths of 20 cm and 15 cm ( transition part being 15 cm and 10 cm respectively ) have been used for the purpose of economy of the testing material .

宽频带复合吸声结构在汽轮发电机组噪声控制中的应用

Application of Wide-Frequency Compound Sound-Absorbing Structure in Noise Control of Turbo-Generator

水下复合层吸声结构中反向声能与振动能量传输的研究

Investigation of inverse energy transmission in composite sound absorption structures in water

大空腔穿孔板吸声结构的吸声特性

A study on sound absorption properties of large - cavity perforated structure

低频宽带共振吸声结构与原理

Broadband resonance sound absorption and it ′ s principle for low frequency

多孔性金属薄板共振吸声结构中的热传导效应

Thermal conduction effect in a sound resonant absorber with porous metal plate

爪式粉碎机筛片吸声结构模型的建立与分析

Establishment and Analysis Absorbing Sound Structure Model for Disk-Mill Sieve

共振吸声结构在汽车降噪中的应用

The Application of Resonance Sound - Absorbing Structures in Lowing Noise of Automobiles

阻抗复合吸声结构的理论与声学特性研究

A Study of the Acoustical Properties of Compound Impedance in Sound Absorbing Structure

穿孔板吸声结构的吸声性能及其应用

Sound Absorptivity and Application of Perforated Panel Structure

在消声水池、大型消声室及水面舰艇上尖劈吸声结构得到广泛应用。

Wedge is widely used in anechoic pools , large anechoic chambers and surface ships .

对穿孔板吸声结构的声学特性进行了理论分析与计算。

Theoretical analysis and calculation on the acoustic properties of perforated panel absorber were described herein .

此外，还计算分析了微穿孔板吊顶吸声结构对车内噪声的影响。

Meanwhile , the influence of sound-absorbing structure consisted of micro-perforated panel and ceiling is researched .

一种新型吸声结构&柔性管束穿孔板共振吸声结构

A brand new type sound absorbing structure & the perforated panel resonator with flexible tube bundles

试验表明，微穿孔板吸声结构可有效地降低排气噪声。

Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise .

宽频带阻抗复合吸声结构应用&氨制冷螺杆压缩机组噪声控制。

Noise control on refrigerator of screw compressor with ammonia by using compounding large channel sound-absorbing structure .

用实验的方法，对改进的狭缝共振吸声结构的共振频率公式进行修正，使其适合该虚拟仪器系统。

The formant frequency formula can be adapted to the virtual instrument system after being corrected through experiment .

微穿孔板吸声结构以其众多的优点，在噪声控制领域得到越来越广泛的应用。

Microperforated panel absorbers are getting more and more widely use in noise control field for it 's large advantage .

铝纤维板与背后空腔组成的吸声结构具有明显的共振吸声特性。

The absorbing structure made of an aluminum fiberboard and a cavity on its back has clear resonance absorption characteristics .

穿孔板吸声结构模态分析及位置选择

The research of perforated plate sound absorption in the flow The Mode Analysis and Position Selection of Perforated Panel Absorber

文中还分析了有肋吸声结构声反射传递函数的变化。

The changes of the transfer functions of reflected sound waves were analysed in the case of absorption structure with ribs .

采用微穿孔板吸声结构，对某型单级轴流压缩机排气噪声进行了降噪研究。

Denoising experiment is carried out on discharge noise of single stage axial compressor by using acoustic system of micro perforation plate .

并在现场采集了噪声的原始数据，运用频谱分析，分析了其噪声频率组成的特点，阐述了噪声控制的原理，对隔声结构、吸声结构、宽频带阻抗复合吸声结构进行了研究。

Also , the original data on spot was collected and the composition character of noise frequency was analyzed by the spectrum .

最后提出一种微穿孔吸声结构的有限元模型，可以直接集合传递函数法计算微穿孔结构的吸声系数，而不用事先计算微穿孔板的声阻抗。

With the FEM modal , the sound absorbing coefficient can be directly obtained without calculating the impedance of micro-perforated panel in advance .

在此基础上基于薄膜阻尼理论和亥姆霍兹共振原理，分别设计了薄膜阻尼消声结构和亥姆霍兹穿孔板吸声结构。

Then design the film-damping structure based on the film-damping theory and the Helmholtz resonance structure based on the Helmholtz resonance theory respectively .

提出一种可用于吸收低频斜入射声波的有源吸声结构。

In many applications , such as reduction of the reflected noise of highway traffic , active surface of sound absorption is highly useful .

应用有限元方法计算静水压力变化下几种橡胶吸声结构的形变和吸声性能。

We applied the finite element method to study the variation of sound absorption structure and performance of rubber material under variable hydraulic pressure .

根据吸声结构理论基础以及多孔吸声材料的吸声机理，结合非织造布的结构特点，系统分析了非织造布的吸声原理。

According to acoustic structure theory base , acoustic principle of multi-holes acoustextile and nonwovens characteristics , nonwovens acoustic theory are analysed in the paper .