Vibration Analysis Of The Surrounding Environment Of Subway Operation Based On ANSYS

With the rapid development of the subway,the metro has played a key role in alleviating traffic jam in major cities,which has unique features such as high volume,operating quickly and punctually and so on.The construction of the subway has greatly improved people's life.However,problems such as vibration and noise caused by subway have also become increasingly prominent when the construction of the metro is booming.At the same time,the increasing utilization of urban space has led to more and more buildings(including residential ones,museums,laboratories,etc.)constructed in the vicinity of subways,which causing buildings to be more affected by the vibration of it.It is imperative to study the influence of the subway vibration and take effective measures.The paper took a residential building and the solid along the 2nd line of Suzhou Metro from Xinjiaqiao Station to Panli Road Station as the research object.And use the finite element software named ANSYS to build the superstructure and the tunnel soil model underneath the section which was studied.According to the track acceleration test report,the vibration acceleration of the track bed was measured to analyze the dynamic response of the subway during operation.The new type of isolator was applied to the foundation of the building to investigate the effect of vibration of the subway.The main contents of this article are following:?Study the principle of subway vibration and the effect of the track bed when the subway is running.Establish the model of superstructure and tunnel solid with finite element software named ANSYS.Then apply the measured subway wave on the soil model to extract time-history curve of control points to explore the vibration of the subway.?Analyzing the tunnel wall affected by the vibration of the subway with one of the modules of ANSYS—LS-DYNA.And extracting the vertical acceleration of the corresponding control points of the tunnel wall in the soil and comparing with the measured results according to the numerical and post-processing method of finite element simulation.They show that the actual measurement and simulated ones have a high degree of coincidence to some extent.?Study the construction of the disc-spring and thick rubber isolator,and know the designs of the device.Design the isolator by calculating the vibration performance and capacity of it.?Establish the system of three-dimensional model.Based on the finite element theory,it was divided into the following two cases:(1)The vibration of the superstructure under the condition that there was no isolator;(2)What the responses of the superstructure were when the isolator was placed on the foundation of the building.Analyze the vibration of the building caused by subway with the method of time-history analysis(including acceleration and displacement).Then compare the vibration of the two cases to study the effect and practicality of the device and finally find that the disc-spring and thick rubber isolator has a good performance to resist vibration.