Page 94 - 《应用声学》2024年第1期
P. 94

第 43 卷 第 1 期                                                                       Vol. 43, No. 1
             2024 年 1 月                          Journal of Applied Acoustics                   January, 2024

             ⋄ 研究报告 ⋄



               某乘用车加速工况车内轰鸣声诊断分析及控制方法





                                      蒋 邹    1   梁 莹    2    吴文栋      1   罗玉军      3†



                                              (1 柳州铠玥科技有限公司       柳州   545006)
                                           (2 上汽通用五菱汽车股份有限公司         柳州   545006)
                                                 (3 广西科技大学     柳州   545006)

                摘要：该文针对某乘用车加速工况出现的轰鸣声进行诊断分析与控制。首先通过主观评价确定问题工况，通
                过实车测试发现 2400 r/min 左右车内存在明显轰鸣声。利用阶次分析、模态分析及错频验证可知，发动机激
                励经悬置传递副车架，引起副车架的共振，进而传递到车内引起轰鸣声。最后通过传递分析及柔性连接点导纳
                法，优化副车架橡胶衬套结构。结果表明，优化后在 2400 r/min 声压总级与 2 阶声压差值为 7.5 dB(A)；声压总
                级较原状态降低 2 dB(A)，2 阶噪声降低 7.8 dB(A)，声压总级和 2 阶噪声声压差值增大，轰鸣声明显减小，主观
                评价可接受。
                关键词：轰鸣声；模态分析；传递路径分析；副车架衬套优化
                中图法分类号: U461.4; TB53          文献标识码: A          文章编号: 1000-310X(2024)01-0090-05
                DOI: 10.11684/j.issn.1000-310X.2024.01.011




                 Diagnosis analysis and control method of booming noise in car’s passenger


                                JIANG Zou 1   LIANG Ying  2   WU Wendong   1  LUO Yujun  3


                                    (1 Liuzhou Kaiyue Technology Co., Ltd., Liuzhou 545006, China)
                                   (2 SAIC GM Wuling Automobile Co., Ltd., Liuzhou 545006, China)
                                 (3 Guangxi University of Science and Technology, Liuzhou 545006, China)

                 Abstract: In this paper, diagnosis, analysis and control of the roar of a passenger car under acceleration
                 conditions are carried out. First of all, the problem conditions are determined through subjective evaluation, and
                 through the real vehicle test, it is found that there is obvious roaring noise in the car around 2400 r/min. Using
                 order analysis, modal analysis and frequency-staggered verification, it can be seen that the engine excitation
                 is transmitted to the sub-frame through the suspension, causing the resonance of the sub-frame, which is then
                 transmitted to the interior of the vehicle to cause a roaring sound. Finally, the subframe rubber bushing
                 structure is optimized by transfer analysis and flexible connection point admittance method. The results show
                 that after optimization, the difference between the overall level at 2400 r/min and the second-order sound
                 pressure is 7.5 dB(A); The overall level and the second order noise sound pressure increase, and the roaring
                 sound decreases significantly. The subjective evaluation is acceptable.
                 Keywords: Booming noise; Modal analysis; Transfer path analysis; Subframe bushing optimization



             2022-08-17 收稿; 2022-09-20 定稿.
             作者简介: 蒋邹 (1991– ), 男, 广西桂林人, 本科, 工程师, 研究方向: NVH 测试。
             † 通信作者 E-mail: lyjlzd@163.com
   89   90   91   92   93   94   95   96   97   98   99