Vehicle-induced Vibration Of The Structure In Integrated Transportation Hub

With the rapid development of urbanization and industrialization in China,the transportation network has become an important hardware platform to support urban economic and social development.Large-scale integrated transportation hubs that introduce transportation modes,such as airplanes,high-speed rail,urban railways and public transportation,have also become the important needs of urban development.Large-scale integrated hubs must meet the seamless connection of multiple modes of transportation.It will become normal for railways to pass through airport terminals or runways.The vibration caused by the train will bring discomfort to the waiting passengers,and even affect the operation of the airport precision instruments,reducing their service life.Therefore,it is of great theoretical and practical significance to study the vibration comfort and vibration control of the airport terminal under the train driving excitation.First,in this paper,the research status of building vibration caused by train operation at home and abroad are summarized,and the basic research methods of vibration control of trains passing through buildings at home and abroad are discussed,and the research content and technical route are clarified(Chapter 1).Second,a train-track coupling dynamics model are established.The train-structure coupling analysis system and the wheel-rail interaction model are discussed.According to the train track parameters of the intercity high-speed railway R1 line and the subway line 4,the train-structure interaction distributed simulation platform is used to calculate the force of the track fastener on the track plate,preparing for train excitation input in a finite element model(Chapter 2).Third,the station(tunnel)-soil-terminal connection model was established to simulate the high-speed train passing through the airport terminal.Through the numerical simulation method,the vibration response of the specific functional room of the airport terminal caused by the train passing is obtained,and the re-radiated noise of the structure is calculated through the empirical formula.Evaluate vibration serviceability and structural re-radiated noise according to the corresponding standard specifications(Chapter 3).Fourth,a vibration isolation layout method optimized for the terminal building is proposed.Based on the evaluation results of the vibration analysis of the terminal building,vibration isolation measures are set for the area exceeding the corresponding standard vibration limit.In the case of vibration isolation bearings,vibration-damping tracks and both,compare the vibration serviceability of the terminal building and the re-radiated noise of the structure,and select the most effective vibration isolation mode(Chapter 4).