摘要
以某型客车白车身的试验模型和车门车窗的有限元模型求取结构模态信息,获取结构20-200 Hz的振动速度特性后,建立车内空腔的边界元模型。在LMS Virtual.Lab中计算声学传递向量特性,从而进行车身板件声学贡献分析,得出各板件对车内场点总声压的贡献度,并找出对车内某点声学贡献大的板件。通过实施改进措施,改善了该车车内噪声水平。
The experimental model of the bus body-in-white and the finite element models of the doors and windows are used to identify the modal parameters,and to calculate the vibration response of the structure in a frequency range of 20-200 Hz.Boundary element model for the interior cavity of the vehicle is set up.The acoustic transfer vector（ATV） is calculated with LMS Virtual.Lab.The panel acoustic contribution analysis is done to determine the contribution of vehicle body panels to the noise levels at the field point and to find the panels which contribute more.By taking improvement measures,the interior noise level is improved.
出处
《汽车技术》
北大核心
2012年第12期30-33,共4页
Automobile Technology
关键词
客车白车身
声传递向量
边界元
板件贡献分析
Bus body-in-white
Acoustic transfer vector
Boundary element
Panel contribution analysis
