Study On Power Flow Theory And Application Of Subway Tunnel Track

In recent years,with the continuous development of urban rail transit industry,more and more urban residents choose subway as the main mode of travel.In order to reduce the impact of subway operation on the surrounding environment vibration,vibration isolation measures such as high elastic fastener monolithic track bed,trapezoid track,ballast pad,floating slab are widely used.But at the same time,some of the vibration reduction and noise reduction lines have caused secondary diseases such as abnormal wave wear,increasing operation costs and even affecting operation safety.How to actively promote new materials and technologies for vibration reduction and noise reduction,implement environmental noise and vibration control of rail transit,and improve environmental quality at the same time,ensure operation safety and reduce operation costs has attracted wide attention of people of insight.This article will trend theory applied to the underground tunnel,Vibration Energy distribution and delivery.The establishment of the orbital structure trend calculation model.Take advantage of the trend of studying the underground tunnel track structure to the vibration characteristics.The main content is as follows:1.Provides an overview of the structure of the track time-domain and frequency domain dynamic characteristics of the study of the status quo,an analysis of the structure of the orbital frequency domain dynamic characteristics.Summary of the current status of research on the theory that summarizes the various trend calculation methodology and its application scenario,the study of the Trend theory in the underground tunnel track structure vibration energy calculations.Summary of the track structure vibration energy research and applications of the orbital Structure Vibration Energy in practical engineering applications..2.The current theory in the orbital Structure Vibration performance features research applications.In the underground tunnel track,for example,the establishment of a track structure trend calculation model,and a structural trend calculation method.3.An analysis of the underground tunnel structure of the vertical vibration energy delivery mechanism.The use of structural trend calculated underground tunnel in the loading of the trend of the times.On the metro rail tunnel structure of the vibration energy transmission characteristics and structure of the orbital parameters on the trend of the times.This reveals the underground tunnel vertical vibration energy delivery mechanism.4.The trend calculation can be applied to real engineering problems.Based on the vehicle-Track-tunnel coupling of kinetic models,the use of trend analysis in the long wave and short wave irregularities inspired by the Metro Rail structure to the vibration characteristics.An analysis of the structure of the orbital parameters on the orbital structure and vibration energy distribution.The main conclusions are as follows:1.In the vibration energy of subway tunnel,the vibration energy of track is mainly distributed in the range of medium and high frequencies,while the vibration energy of ballast plate is mainly distributed in the range of medium and low frequencies.The difference of power flow between guide rail and ballast plate indicates that the fastener can reduce the vibration energy of the system,while the difference of power flow between ballast plate and liner plate fully indicates that the damping pad can reduce the vibration energy of the system.The vibrational energy of the system.2.After the vibration isolation device is added,the vibration energy will be redistributed on the vibration reduction track of the subway tunnel.The vibration energy of different structures varies in amplitude.The vibration energy of lining is much less than that of guide rail and ballast plate.3.Adding vibration isolation device in the subway tunnel can effectively reduce the vibration energy of the track and rail slab flowing towards the lining.At the same time,reducing the rigidity of vibration isolation device will greatly increase the vibration energy of track and track base plate.Therefore,how to better choose the stiffness of vibration isolator is a very important topic in the study of vibration energy of subway tunnels.4.The low interference spectrum of Germany can make the vibration energy of the subway tunnel damping track greater,which is a relatively short wave irregularity.The reason is that Germany’s low-interference spectrum is larger than its short-wave spectrum.The influence of uneven track on vibration energy of subway tunnel is mainly distributed in the middle and low frequencies.