摘要
为研究地铁列车通过咽喉区时引发的垂向振动传播规律,对某地铁车辆段咽喉区道岔进行现场实测,按现场实际工况对数据进行分类处理,采用傅里叶变换、1/3倍频程等方法研究其振动特性,最终总结出列车出入库、不同车速、不同轨道条件下的振动响应规律。研究结果表明:列车出入库时轮轨接触方向不同导致振动水平不同,入库时各测点Z振级比出库时大1.4~1.7 dB;轮轨激励主要频段处对应的振动加速度级与车速成正比,车速增大使该频率处振动加速度级也增大;道岔减振垫能吸收12.5 Hz以内和40 Hz以上的振动能量,尤其是高频能量,与普通道岔相比其减振效果平均可达9.8 dB;由于咽喉区错综复杂的柱网结构与盖板尺寸,盖板与板上立柱测点在各种频率振动相互叠加下存在多个主频,且多分布在20~50 Hz频段内。
To investigate the vertical vibration propagation patterns caused by the trains passing through throat areas,field measurements of the turnout in the throat area of a metro depot were conducted.The data were classified and processed according to actual operating conditions,and the vibration characteristics were analyzed by Fourier transform,1/3 octave band analysis,and other methods.Finally,the vibration response patterns during train movements in and out of depot,different speeds,and different track conditions were summarized.The results showed that the different wheel-rail contact directions led to different vibration levels during train movements in and out of the depot.The Z-vibration level at each measurement point was 1.4 dB to 1.7 dB higher during train entry than exit.The vibration acceleration level corresponding to the main frequency band of wheel-rail excitation showed positive correlation with train speed.An increase in train speed resulted in a rise in vibration acceleration level at this frequency band.The turnout damping pad could absorb the vibration energy below 12.5 Hz and above 40 Hz,especially the high-frequency energy,demonstrating an average vibration reduction of 9.8 dB compared with ordinary turnouts.Due to the complex column-grid structure and cover plate dimensions in the throat area,multiple main frequencies were observed at measurement points on the cover plate and column that resulted from the superposition of various frequency vibrations,and these frequencies were primarily concentrated in the 20 Hz to 50 Hz frequency band.
作者
徐宇
孙思为
杜华熹
徐浩能
刘庆杰
XU Yu;SUN Siwei;DU Huaxi;XU Haoneng;LIU Qingjie(Real Estate Business Headquarters,Guangzhou Metro Group Co.,Ltd.,Guangzhou 510335,China;School of Transportation Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《铁道标准设计》
北大核心
2025年第7期164-170,共7页
Railway Standard Design
基金
国家自然科学基金项目(51868024,52068029)。
关键词
地铁车辆段
出入库
咽喉区
道岔
现场实测
减振垫
车速
振动特性
metro depot
in and out of depot
throat area
turnouts
field test
vibration damping pad
metro speed
vibration characteristics
