城市轨道交通轨道不平顺对振动源强环境影响评价研究

为研究城市轨道交通不平顺程度的振动环境影响，通过车辆-轨道空间耦合动力学模型和轨道-隧道-土体三维有限元-无限元耦合模型进行仿真，并用振动源强实测数据验证列车运行速度为100~120 km/h、不同轨道不平顺谱条件下的速度修正系数。
结果表明：当轨道条件恶劣时，振动环境影响速度修正系数建议值为36.2；当轨道条件一般时，振动环境影响速度修正系数建议值为31.0；当轨道条件较好时，振动环境影响速度修正系数建议值为23.3。

Research on environmental impact assessment of urban rail transit track roughness on vibration source intensity

In order to study the vibration environmental impact of the unevenness of urban rail transit, by applying the vehicle-track space coupling dynamics model and the track-tunnel-soil three-dimensional finite element-infinite element coupling model, and verified with the measured data of vibration source intensity, the speed correction coefficients under the train speed of 100-120 km/h and different track irregularity spectrum conditions was obtained. When the track conditions were severe, the recommended value of correction coefficient of vibration environment influence speed was 36.2; when the track conditions were normal, the recommended value of correction coefficient of vibration environment influence speed was 31.
0; when the track conditions were good, the recommended value of correction coefficient of vibration environment influence speed was 23.3. This research could provide a reference and basis for the evaluation of urban rail transit vibration environmental impact and vibration reduction design.