Page 38 - 《应用声学）》2023年第5期
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第 42 卷 第 5 期                                                                       Vol. 42, No. 5
             2023 年 9 月                          Journal of Applied Acoustics                 September, 2023

             ⋄ 研究报告 ⋄



                             纳米填充硅橡胶超声干耦合特性                                               ∗





                                  宋寿鹏      †  张泽林 樊素文 魏明惠 钮臣浩



                                               (江苏大学机械工程学院       镇江   212013)

                摘要：针对工业超声无损检测领域干耦合材料种类匮乏且声能透射率低的问题，在室温硫化硅橡胶基底材料
                中添加不同成分和配比的纳米颗粒，制备了不同种类的干耦合材料，给出了干耦合条件下超声波的传输模型，
                得到了声学传输规律，对比分析了干耦合材料种类、厚度、硬度、超声中心频率及载荷因素对声能传输特性的
                影响。搭建了声学特性测试试验平台，分别对添加氧化铝、铁和二氧化硅纳米颗粒制备的干耦合材料进行了
                测定，试验结果表明填充二氧化硅质量分数为 5% 时，所形成的纳米填充硅橡胶的声阻抗提高了 13.5%，使用
                200 kPa 预载荷对试块测量时回波幅值提高了 18.0%，具有良好的声耦合性能。可为实际超声检测时干耦合材
                料的制备及应用提供参考。
                关键词：超声；干耦合；硅橡胶；纳米颗粒；传输特性
                中图法分类号: TB55           文献标识码: A          文章编号: 1000-310X(2023)05-0930-08
                DOI: 10.11684/j.issn.1000-310X.2023.05.005




                  The ultrasonic dry coupling characteristics of nano-filled silicone rubber



                       SONG Shoupeng ZHANG Zelin         FAN Suwen    WEI Minghui     NIU Chenhao

                               (School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China)

                 Abstract: In order to overcome the shortage of dry coupling materials and low transmittance of sound energy in
                 the field of industrial ultrasonic nondestructive testing, different kinds of dry coupling materials were prepared
                 by adding different nanoparticles with different composition and ratio in room temperature vulcanized silicone
                 rubber base materials. The ultrasonic transmission model under dry coupling conditions was given and the law
                 of acoustic transmission was obtained. The influence of different dry coupling materials, thickness, hardness,
                 center frequency of ultrasound and load on the acoustic energy transfer performance is compared and analyzed.
                 An experimental platform for testing the acoustic properties was set up. The dry coupling materials prepared
                 by adding alumina, iron and silicon dioxide nanoparticles were measured. The results show that the acoustic
                 impedance of the nano-filled silicone rubber increased by 13.5% when the mass fraction of filled silicon dioxide is
                 5%, and the echo amplitude increased by 18.0% when the pre-load of 200 kPa was used. Therefore, it has good
                 acoustic coupling performance than other materials. This research can provide a reference for the preparation
                 and application of dry coupling materials in the actual ultrasonic testing.
                 Keywords: Ultrasonic; Dry coupling; Silicon rubber; Nanoparticles; Transmission characteristics



             2022-06-14 收稿; 2022-08-08 定稿
             国家自然科学基金项目 (52175511)
             ∗
             作者简介: 宋寿鹏 (1967– ), 男, 山西定襄人, 博士, 教授, 研究方向: 无损检测。
             † 通信作者 E-mail: songshoupeng@126.com
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