Page 14 - 《应该声学》2022年第2期
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第 41 卷 第 2 期                                                                       Vol. 41, No. 2
             2022 年 3 月                          Journal of Applied Acoustics                    March, 2022

             ⋄ 研究报告 ⋄



               复合声子结构的声场模拟及噪声-压电转化设计                                                                    ∗





                 全飞熊      #   陈浠庆      #   李 晨 陈亚柯 尹 源 陈瑞扬 阎一诺 罗 雯                                      †


                                                (武汉理工大学理学院      武汉   430070)

                摘要：城市噪声作为一种污染源，给人们的生活带来不便；同时噪声中蕴含的能量没有被合理利用，造成浪费。
                为了解决此问题，该文设计引入了点缺陷的声子晶体、纤维层、压电材料复合结构，对入射噪声进行有效吸收
                并在点缺陷处对入射声压有较明显的声压加强。采用有限元和边界元的方法，对该复合结构的降噪发电效果
                进行数值模拟。结果显示在输入声压为 2 Pa 时，声子晶体结构带隙 1.1 kHz 处，吸声系数达到 0.6，压电片有最
                                                              3
                高的输出电压 0.5 V，输出功率密度达到 308.49 µW/cm 。与传统降噪结构相比能更好地实现对声能的吸收
                与利用。
                关键词：点缺陷声子晶体；纤维颗粒复合吸声结构；压电材料；声能 -电能转化
                中图法分类号: O429           文献标识码: A          文章编号: 1000-310X(2022)02-0182-10
                DOI: 10.11684/j.issn.1000-310X.2022.02.002





              Sound field simulation based on a compound phonon structure and a design of
                                           noise-piezoelectric conversion


                     QUAN Feixiong CHEN Xiqing LI Chen CHEN Yake YIN Yuan CHEN Ruiyang

                                                  YAN Yinuo LUO Wen

                                 (School of Science, Wuhan University of Technology, Wuhan 430070, China)

                 Abstract: As a kind of pollution source, urban noise causes inconvenience to people’s life. At the same time,
                 the energy contained in the noise is wasted, but not used properly. In order to solve this problem, a phonon
                 crystal, fiber layer and piezoelectric composite structure with point defects are introduced in this work to
                 effectively absorb incident noise and enhance incident sound pressure obviously at point defects. Finite element
                 and boundary element methods are used to numerically simulate the noise reduction effect of the composite
                 structure. The results show that when the input sound pressure is 2 Pa, the sound absorption coefficient
                 reaches 0.6 at 1.1 kHz of the band gap of phonon crystal structure, the piezoelectric plate has the highest
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                 output voltage of 0.5 V, and the output power density reaches 308.49 µW/cm . Compared with traditional
                 noise reduction structures, the new structure can realize the absorption and utilization of sound energy better.
                 Keywords: Phonon crystal structure with point defects; Fiber-granule composite structure of sound
                 absorption; Piezoelectric materials; Acoustic-electrical energy conversion


             2021-03-15 收稿; 2021-05-31 定稿
             ∗ 国家自然科学基金项目 (51904216) , 国家大学生创新训练项目 (202010497007)
             作者简介: 全飞熊 (2000– ), 男, 湖北荆州人, 本科在读。
                    陈浠庆 (2000– ), 男, 湖北武汉人, 本科在读。
             †  通信作者 E-mail: luowen_1991@whut.edu.cn
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