法向入射阻抗管中声学衬里试样压紧力的控制

Volume! Pub Date : 2021-06-01 DOI:10.36336/AKUSTIKA202139277

O. Kustov, V. Palchikovskiy, Igor Khramstov, R. Bulbovich

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引用次数: 0

摘要

该研究考虑了施加于在法向入射阻抗管中的声学衬垫样品的压力控制对被测样品声学特性传播的影响。介绍了一种带压样力控制系统的法向阻抗管的设计。该系统是一个活塞在一个气压控制单元的气缸中实现的。测量是在环境特征彼此不同的日子进行的。这使得更好地跟踪压紧力对减小声学特性传播的影响成为可能。在有和没有压力控制的情况下，在法向入射阻抗管上对声学衬垫样品进行了10次测量。这些测量进行了六个月。因此，研究表明，施加在声学衬垫样品上的压力控制提供了较小的声学特性扩展。

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ON CONTROL OF A PRESSING FORCE APPLIED TO ACOUSTIC LINER SAMPLE IN A NORMAL INCIDENCE IMPEDANCE TUBE

The study considers the influence of control of the pressing force applied to an acoustic liner sample in a normal incidence impedance tube on the spread of acoustic characteristics of the tested sample. The design of a normal incidence impedance tube with a control system of a sample pressing force is presented. This system is implemented as a piston in a pneumatic cylinder with a pressure control unit. The measurements were taken on days when the characteristics of the environment were different from each other. This made it possible to better track the influence of the pressing force on reducing the spread of acoustic characteristics. In total, 10 measurements of the acoustic liner sample were carried out on a normal incidence impedance tube with and without control of the pressing force. The measurements were carried out for six months. As a result, the study has shown that the control of the pressing force applied to the acoustic liner sample provides a smaller spread of the obtained acoustic characteristics.

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