Calculation of noise from railway bridges and viaducts: experimental validation of a rapid calculation model
Calculation of noise from railway bridges and viaducts: experimental validation of a rapid calculation model
复制标题
DOI：
10.1016/j.jsv.2005.12.016
复制
发表时间：
2006-06
影响因子：
4.7
通讯作者：
O. Bewes;D. Thompson;C.J.C. Jones;A. Wang
中科院分区：
文献类型：
--
作者：
O. Bewes;D. Thompson;C.J.C. Jones;A. Wang
铁路桥梁或高架桥在交通状态下发出的噪声原则上可以使用有限元技术计算，该技术考虑了桥梁的特定几何形状，但对于模态密度大的高频，这可能是非常计算密集的。这意味着执行大型参数化设计研究的好处往往被完成它们所花费的时间所掩盖。本文提出了一种轨道向桥梁传递振动功率的快速计算模型，并与振动功率传播和噪声辐射的统计能量分析方法相结合。这较少依赖于桥梁的精确几何形状，而更多地依赖于其一般特性。该模型最近已开发，以代表在低频和移动性的支持梁在高频更详细的轨道和桥梁之间的耦合。并以某钢-混凝土组合高架桥为例进行了噪声和振动分析。然后将预测结果与高架桥在交通荷载作用下的真实的实验噪声和振动数据进行比较。
The noise emitted by a railway bridge or viaduct under traffic can, in principle, be calculated using finite element techniques that take account of the specific geometry of the bridge, but for high frequencies, where the modal density is large, this can be very computationally intensive. This means that the benefits of performing large parametric design studies are often overshadowed by the time taken to complete them. Here, a rapid calculation model is described for the vibration power transfer from the rail into the bridge that is coupled with the SEA method for vibration power propagation and noise radiation. This relies less on the exact geometry of the bridge and more on its general characteristics. The model has recently been developed to represent the coupling between the rail and bridge at low frequencies and the mobility of the support girder at high frequencies with greater detail. It is used here to evaluate the noise and vibration of a concrete–steel composite viaduct. The predictions are then compared with real experimental noise and vibration data taken from the viaduct under traffic.