摘要
为探究桥梁跨径对结构噪声的影响，选取30m的混凝土箱梁为研究对象，采用有限元-边界元联合仿真技术进行数值仿真，并进行现场试验验证。在此基础上，通过改变桥梁跨径和改变桥梁结构体系，探讨了桥梁跨径对桥梁结构噪声的影响规律。研究结果表明：箱梁振动和噪声的峰值频率为50～63Hz，减小桥梁跨径能降低结构噪声，增大跨径结构噪声先升后降；改变桥梁体系能够有效改善结构噪声水平。
In order to identify the influence of bridges pan on structural noise, the 30 m concrete box girder is chosen in the research work, the finite element and boundary element combined simulation technology is used to simulate the structure, and the field test is carried out.On this basis, the influence of bridge span on the bridge structure noise is discussed by changing the bridge span and changing the bridge structure system. The results show that the peak frequency of the vibration and noise of the box girder is 50 - 63 Hz, reducing the noise by reducing span of bridge and span structure, increasing the noise at fi rst and then decreasing the noise. The change of bridge system can effectively improve and control the structure noise level.
作者
张磊
耿传智
Zhang Lei;Geng Chuanzhi
出处
《现代城市轨道交通》
2016年第6期44-48,共5页
Modern Urban Transit
关键词
城市轨道交通
桥梁跨径
结构噪声
有限元-边界元
urban rail transit
rail transit
bridge span
structural noise
fi nite element-boundary element
