摘要
提出一种基于全局传递率矩阵的相对传递路径分析方法,该方法建立传递路径分离模式,对分离模式下的响应进行预测,并计算出传递路径相对贡献度。针对轿车车身振动问题进行应用研究,选取发动机悬置安装点加速度和车内座椅安装处加速度作为振动传递分析的研究对象,试验结果表明,基于全局传递率矩阵的相对传递路径分析方法可以有效预测振动传递分离模式下的目标加速度,能够识别出贡献度较大的传递路径,验证了方法的工程可行性,为开展轿车车身NVH性能分析提供了可借鉴的方法和途径。
A relative transfer path analysis method based on global transmissibility matrix is proposed in this paper,that establishes transfer path separation mode and predicts the system response under this mode. The relative transfer path contribution is then calculated. The method is applied to passenger car body NVH issue, in which the acceleration at engine mounting point and seat mounting point are chosen as objects of study. The results show that the proposed method can predict the target acceleration under the vibration transfer separation mode effectively, recognize the transfer path with greater contribution. Engineering feasibility of this method is proved, which provides referential methods and approach for passenger car body NVH analysis.
出处
《汽车技术》
CSCD
北大核心
2017年第9期34-39,共6页
Automobile Technology
关键词
车身振动
传递路径
传递率矩阵
相对贡献度
Vehicle body vibration
Transfer path
Transmissibility matrix
Relative contribution
