Page 65 - 应用声学2019年第4期
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第 38 卷 第 4 期                                                                       Vol. 38, No. 4
             2019 年 7 月                          Journal of Applied Acoustics                      July, 2019

             ⋄ 李启虎院士八十华诞学术论文 ⋄



               散射条件下声源分离及参数获取的平行障板方法                                                                     ∗






                                                        莫喜平      †


                                               (中国科学院声学研究所       北京   100190)

                摘要    声呐系统或水声设备湿端不可避免存在某些散射体，克服散射体干扰对声源本身辐射特性进行测量目
                前还缺乏简捷有效的方法。依据刚性圆盘散射规律，通过有限元建模分析了与观察方向平行布设的刚性圆盘
                对声源辐射特性的影响规律，结果表明：在满足远场条件时，在较小的允许误差范围内观察轴线上声压幅值分
                布与引入平行障板无关。并在此基础上尝试提出一种简捷有效的平行障板方法，实现散射条件下声源分离与
                参数获取。通过有限元仿真分析，在 1 kHz ∼ 20 kHz 频率范围内，半径 0.4 m、厚 8 mm 的钢板对脉动圆管声
                源级分离测量引入误差在 ±0.6 dB 以内。
                关键词     散射，参数获取，远场条件，平行障板，声源
                中图法分类号: TB565           文献标识码: A          文章编号: 1000-310X(2019)04-0525-05
                DOI: 10.11684/j.issn.1000-310X.2019.04.008




                    Parallel-baffle method for separateness and parameters acquisition of
                                     a sound source under scatting condition




                                                        MO Xiping

                                (Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)

                 Abstract  In underwater part of sonar system and sound device some scatting objects exist ineluctability, it
                 is empty of a simple and efficient method for measurement radiation parameters of a sound source without
                 disturbance form scatting objects. Based on the sound scatting theory of rigid disk, have been analyzed the
                 effect of a parallel baffle to observed direction on radiation parameters of a sound source. The results are
                 shown that: on the far-field condition, pressure amplitude distribution in observed direction is independent of
                 the parallel baffle with a smaller admissible error. On that basis, we have attempted to develop a simple and
                 efficient parallel-baffle method to separateness and parameters acquisition of a sound source under scatting
                 condition. Radiation performances of a pulsating tube transducer and with a parallel baffle are comparatively
                 simulation analyzed by finite element method with ANSYS software, which gives the results that the calculated
                 error of source level of the pulsating tube transducer by using a parallel baffle (steel plant with thickness of
                 8 mm and radius of 0.4 m) in a frequency range from 1 kHz to 20 kHz was not exceed ±0.6 dB.
                 Key words Scatting, Parameters acquisition, Far-field condition, Parallel baffle, Sound source



             2019-02-15 收稿; 2019-05-07 定稿
             ∗ 中国科学院声学研究所率先计划项目
             作者简介: 莫喜平 (1966- ), 男, 辽宁人, 研究员, 博士生导师, 研究方向: 水声换能器。
             † 通讯作者 E-mail: moxp@mail.ioa.ac.cn
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