Page 227 - 《应用声学》2023年第4期

第 42 卷 第 4 期 Vol. 42, No. 4
2023 年 7 月 Journal of Applied Acoustics July, 2023

⋄ 经验交流 ⋄

某轻客低速轰鸣分析与改进 ∗

陈慈龙 1,2† 徐高新 1,2 郭 峰 1,2 谢 政 1,2 万 松 1,2

(1 江铃汽车股份有限公司 南昌 330001)
(2 江西省汽车噪声与振动重点实验室 南昌 330001)

摘要：某轻型客车在 1100∼1500 r/min 转速区间加速工况下存在明显车内轰鸣问题，严重影响乘坐舒适性。
该文通过对激励源、悬挂结构传递路径和车身响应详细诊断和分析，判断根本原因为传动系扭转振动激励过
大、激励前悬挂系统模态导致振动传递到车身零部件与声腔模态耦合引起车内轰鸣问题。最终通过在前风窗
下横梁和尾门增加复合车身解决方案、前围板凸筋加强和前转向节增加动力吸振器解决了轰鸣问题。该文分
析方法和优化方案为解决类似问题提供了重要的参考价值。
关键词：复合车身解决方案；声腔模态；动力吸振器；工作变形模态；轰鸣
中图法分类号: TB535 文献标识码: A 文章编号: 1000-310X(2023)04-0889-07
DOI: 10.11684/j.issn.1000-310X.2023.04.025

Booming analysis and optimization of a light commercial bus

CHEN Cilong 1,2 XU Gaoxin 1,2 GUO Feng 1,2 XIE Zheng 1,2 WAN Song 1,2

(1 Jiangling Auto Company Ltd., Nanchang 330001, China)
(2 Jiangxi Vehicle Noise and Vibration Key Lab., Nanchang 330001, China)

Abstract: There is an obvious booming noise in the acceleration process of a light commercial bus when the
engine speed is 1100–1500 r/min, serious influence on driver and passenger comfort. In this paper, through the
analysis of the excitation, structure-bore path and body panel response, the root cause is torsional vibration
excite suspension modal then transfer to body parts and coupling with acoustic mode. The booming issues were
finally solved by adding composite body solutions (CBS) in the front windshield beam, reinforce dash-panel,
adding CBS to lift gate and adding damper to front suspension knuckle. This research idea and countermeasures
provides important reference value for the subsequent solution of similar issues.
Keywords: Composite body solutions; Acoustic cavity modes; Damper; Operational deflection shape; Booming

2022-04-12 收稿; 2022-07-21 定稿
江西省汽车噪声与振动重点实验室开放课题 (JXNVHKB-KFKT-201801)
∗
作者简介: 陈慈龙 (1992– ), 男, 江西赣州人, 本科, 工程师, 研究方向: 整车噪声与振动控制。
† 通信作者 E-mail: cchen3@jmc.com.cn