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第 38 卷 第 3 期                                                                       Vol. 38, No. 3
             2019 年 5 月                          Journal of Applied Acoustics                      May, 2019

             ⋄ 研究报告 ⋄



                            车内某高频噪声的分析和优化控制






                                石教华      1†  赵 江     1   王 毅    1   尤勇利      2  金江恒      2


                                 (1  江铃汽车股份有限公司       江西省汽车噪声与振动重点实验室          南昌   330052)
                                            (2  浙江银轮机械股份有限公司        台州   317200)

                摘要    针对某柴油皮卡车型在急加油门时出现的高频噪声，利用声学滤波技术确定其噪声能量主要分布在
                9000∼1400 Hz 频段。采用近场声学测试、声振频谱分析等方法锁定噪声源来自废气再循环冷却器。通过理论
                分析和计算流体动力学数值仿真技术，研究了该废气再循环冷却器波纹管处介质流场情况，流场的不均匀性
                和大涡流是辐射高频噪声的主要原因。仿真分析显示优化设计后该高频噪声得到明显改善，最后通过整车实
                验验证，结果显示优化效果良好。
                关键词     波纹管噪声，近场声学测试法，声振频谱分析法，计算流体动力学
                中图法分类号: TB535           文献标识码: A          文章编号: 1000-310X(2019)03-0358-06
                DOI: 10.11684/j.issn.1000-310X.2019.03.010






                     Analysis and optimization of a high frequency noise in pickup’s cab



                          SHI Jiaohua 1  ZHAO Jiang 1  WANG Yi  1  YOU Yongli 2   JIN Jiangheng 2

                       (1 Jiangling Motor Co., Ltd., Key Laboratory of Automobile Noise and Vibration of Jiangxi Province,
                                                   Nanchang 330052, China)
                                         (2 Zhejiang Yinlun Co., Ltd., Taizhou 317200, China)

                 Abstract  A high frequency noise in pickup’s cab was studied in this paper. In order to diagnose the problem,
                 filtering technology was used. The noise frequency is mainly between 9000 to 14000 Hz. After finishing the
                 near field acoustic test and acoustic & vibration spectrum analysis test, it’s confirmed that the noise came from
                 the exhaust gas recirculation (EGR) cooler. Flow distribution inside the bellows of EGR cooler was studied
                 by numerical investigation. Fluid flow maldistribution and maelstrom are the causes of this noise problem.
                 Simulation shows this high frequency noise is improved by optimized design. Vehicle test and subjective
                 assessment show that optimization is effective in the end.
                 Key words Noise of bellows, Near field acoustic test, Spectrum analysis, Computational fluid dynamics








             2018-10-09 收稿; 2018-12-31 定稿
             作者简介: 石教华 (1986- ), 男, 湖北阳新人, 硕士, 研究方向: 汽车噪声与振动。
             † 通讯作者 E-mail: jshi1@mail.jmc.com.cn
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