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Experimental research on sound absorption properties of impedance gradient composite with multiphase
Liu RX(刘瑞霞); Pei DL(裴东亮); Wang YR(王育人)
Source PublicationIOP Conference Series: Materials Science and Engineering, Volume 733
2020
Pages10.1088/1757-899X/733/1/012009
Conference NameInternational Conference on Novel Functional Materials
Conference Date8–9 November 2019
Conference PlaceShanghai, China
Abstract

In order to improve the sound absorption performance of the sound absorbing material in water, impedance gradient underwater sound absorbing composite with multiphase (IGCM) is prepared in this study. By superposing several layer materials of different impedance gradients, the mixture is poured in the mold layer by layer so that three kinds of IGCM with different mass density gradients of iron powder, tungsten powder and mixture of iron powder and tungsten powder are prepared. Under two operating conditions of the incident angle of 0°and 20°, the results show that the three IGCMs have good broadband absorption characteristics. The sound absorption frequency ranges of the three samples of IGCM under normal incident conditions are concentrated between 6kHz and 10kHz. The sound absorption performance of IGCM under oblique incidence is better than that under normal incidence, especially the IGCM with iron-tungsten powder, which could achieve wide-band strong sound absorption from 2kHz to 10kHz under the condition of oblique incident. The IGCM with iron-tungsten phase under sound wave's incident angle of 20 ° exhibits better sound absorption performance than the other two, which provides a theoretical reference for the design and manufacture of gradient sound absorbing materials.

Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81649
Collection微重力重点实验室
Recommended Citation
GB/T 7714
Liu RX,Pei DL,Wang YR. Experimental research on sound absorption properties of impedance gradient composite with multiphase[C]IOP Conference Series: Materials Science and Engineering, Volume 733,2020:10.1088/1757-899X/733/1/012009.
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