摘要
车轮是铁路客车上重要的声辐射部件。客车运行时，轮轨表面粗糙度使车轮产生振动及辐射噪声。利用有限元软件ABAQUS建立车轮的有限元模型，并计算0—10000Hz内车轮的固有模态及振型。在车轮名义接触点施加单位力，采用模态叠加法，对车轮的频率响应函数进行分析。将车轮的频率响应作为边界条件，利用直接边界元法对其进行声辐射特性分析。
In railway carriages, the wheels are the important components radiating noise. Wheels will vibrate excited by the wheel/rail surface roughness and produce noise emission when carriages runs. FEM of the wheel is built by ABAQUS, and the natural frequency and vibration modes of the wheel of 0-10000Hz are calculated. A normal unit force is applied on the nominal contact point to analyze the frequency response function of the wheel using modal superposition method. The result of the frequency response function, is taken as boundary condition to analyze the sound radiation characteristics through the direct boundary element method （DBEM）.
出处
《机械》
2014年第3期8-10,共3页
Machinery
关键词
铁路车轮
有限元法
直接边界元法
声辐射特性
wheel of railway carriage
FEM
direct boundary element method
acoustic radiation characteristics
