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Teaching-learning-based optimization of an ultra-broadband parallel sound absorber

机译:基于教学的超宽带平行声音吸收器的优化

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摘要

The average sound-absorption coefficient of an ultra-broadband parallel sound absorber, between 0 and 2000 Hz, is optimized in certain conditions. This is accomplished using a teaching-learning-based optimization algorithm, where the geometric parameters are used as optimization variables. The optimized ultra-broadband parallel sound absorber has an average sound-absorption coefficient of 0.9255. The surface impedance of its structure is almost perfectly matched with the surrounding air - thanks to the optimized lengths of both the lateral and micro-perforated plates. The effective-medium model, the transfer-matrix method, and the finite-element method are applied and show consistent results. The acoustic-impedance tube measurements confirm that the optimized ultra-broadband parallel sound absorber shows high sound-absorption from 200 to 1715 Hz. The investigated passive acoustic design opens new possibilities for new absorber types in the future. (C) 2021 Elsevier Ltd. All rights reserved.
机译:超宽带平行吸声器的平均吸声系数,0和2000赫兹之间,在一定的条件进行了优化。这是使用基于教学 - 学习的优化算法,在几何参数作为优化变量来实现的。优化的超宽带平行吸声器具有0.9255的平均吸声系数。其结构的表面阻抗几乎完全与周围空气相匹配 - 由于横向和微穿孔板的优化长度。有效介质模型,转移矩阵的方法,以及所述有限元法被应用,并且显示出一致的结果。声阻抗管测量证实,优化后的超宽带平行吸声器显示出高的吸声从200到1715赫兹。被调查的被动声学设计打开了未来的新吸收类型的新的可能性。 (c)2021 elestvier有限公司保留所有权利。

著录项

  • 来源
    《Applied Acoustics》 |2021年第7期|107969.1-107969.8|共8页
  • 作者单位

    Northwestern Polytech Univ Sch Marine Sci & Technol Key Lab Ocean Acoust & Sensing Xian 710072 Peoples R China|Nanyang Technol Univ Sch Phys & Math Sci Div Phys & Appl Phys Singapore 637371 Singapore;

    Qingdao Airjj New Mat Co Ltd Qingdao 266100 Peoples R China;

    North Univ China Sch Mechatron Engn Taiyuan 030051 Peoples R China;

    Northwestern Polytech Univ Sch Marine Sci & Technol Key Lab Ocean Acoust & Sensing Xian 710072 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Broadband sound absorption; TLBO algorithm; Effective medium model; Transfer matrix method;

    机译:宽带吸声;TLBO算法;有效媒体模型;转移矩阵法;

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