摘要
建立城市轨道车辆车体结构和车内空腔有限元模型,应用模态分析技术分别对车体结构模态和车内空间声学模态进行研究。对车体结构进行改进,对比改进前后的结构模态以及轨道客车在转向架激励下车身结构振动产生的不同频率下的车内声场分布,获得降低车内噪声的参考依据。
he finite element model（FEM）of the structure and interior acoustic cavity of an urban railway vehicle is established for modal analysis.The body structure is improved,and its vibration modes and the sound field distribution at different frequencies actuated by the bogie in the urban railway vehicle are compared with those of the unimproved structure.Some conclusions are obtained for noise abatement of urban railway vehicles.
出处
《噪声与振动控制》
CSCD
北大核心
2011年第3期76-79,共4页
Noise and Vibration Control
基金
江苏省自然科学基金(BK2009212)
关键词
声学
有限元
结构模态
声学模态
声场分布
acoustics
FEM
structure modal analysis
acoustic modal analysis
sound field distribution
