城市轨道车辆车内噪声特性研究

采用有限元法结合边界元法研究按额定速度行驶的城市轨道客车车内噪声特性。车辆行驶工况下车身所受到的结构激励力以车底架上的载荷谱描述,采用有限元计算该激励下车体表面的振动速度,并采用边界元法预报相应的车内声场。最后,分析车身表面不同位置对声场最大声压级点的贡献量及其随频率和空间分布的规律。

Study on Characteristics of Interior Noise of Urban Railway Passenger Vehicle

In this paper, the interior noise characteristics of an urban rail passenger vehicle traveling at rated velocity are studied by using the combination of finite element method and boundary element method.The structural excitation forces acting on the vehicle's body are described by the load spectra at the vehicle's bottom frame.The body surface's vibration velocities are calculated by means of finite element method, while the interior noise field is predicted by using boundary element method.Finally, the contributions of the different portions of the body's surfaces to the maximum SPL field points are analyzed, and their features versus frequency and space are also analyzed.