基于冲击振动时延特性的异响源识别研究
The Abnormal Sound Source Identification Study Based on the Impact Vibration Time Delay Characteristics
杨兴国 1杨诚 2赖天华3
作者信息
- 1. 重庆工商职业学院,重庆 401520
- 2. 重庆大学机械与运载工程学院,重庆 400030
- 3. 重庆长安福特汽车有限公司,重庆 401120
- 折叠
摘要
异响影响汽车的整车NVH性能,汽车异响主要为冲击异响,识别冲击异响源对解决整车NVH性能问题有着重要意义.这里首先介绍了一种求解带阻尼多自由系统的强迫振动响应计算方法.然后利用带阻尼的五自由度质量弹簧系统介绍了冲击振动时延特性的定义,研究了质量、刚度以及阻尼对时延特性的影响.接着分析已知冲击振动源的实验数据,验证了其时延特性.最后,应用冲击振动时延特性,成功找到了某型号新下线车辆的坏路冲击异响源.因此,利用冲击振动的时延特性能寻找冲击异响源是一个行之有效的方法.
Abstract
Abnormal noise affects the vehicle's NVH performance,The abnormal noise of automobiles is mainly impact abnormal noise.Identifying the source of impact abnormal noise is of great significance to solve the problem of the vehicle's NVH perfor-mance.Firstly,it has introduced a calculation method for Solving the forced vibration response of a damped multi-free system.Then,it has presented the definition of the time-delay characteristic of shock vibration by using a damped five-degree-of-freedom mass-spring system,and studied the effects of mass,stiffness and damping on the time-delay characteristic.Next,the article has analyzed the experimental data of the known shock and vibration to verify its time-delay characteristics.Finally,by applying the shock and vibration time-delay characteristics,we successfully found the source of the abnormal noise on the bad road of a new off-line vehicle of a certain model.Therefore,it is an effective method to use the time-delay characteristic of shock vibration to find the source of abnormal shock.
关键词
汽车NVH/冲击振动/时延特性/带阻尼多自由度/异响Key words
Auto NVH/Impact Vibration/Time Delay Characteristic/Damped Multi Degree of Freedom/Abnor-mal Sound引用本文复制引用
基金项目
重庆市教委科学技术研究项目(KJQN202004005)
重庆工商职业学院科研项目(NDZD2020-02)
出版年
2024
NETL
NSTL
维普
万方数据