The Technical Research Of Dynamic Examination Of Taxiway Bridge

As the main transportation facility of the flight area field road system, the mechanics performance or health status of the taxiway bridge is related directly to the airport safety. So, it is necessary to test its health and assess its mechanics performance regularly. The conventional methods of bridge detection have been misfit, because that compared with the common bridge, the taxiway bridge has characteristics of more width, heavier load and more difficulties to obstruct the traffic. Therefore, it is essential to develop a new method that can finish the evaluating quickly and without loss. This new method aimed at the taxiway bridge features can realize the effective health assessment and ensure the safe operations.The influence factor of displacement impact factor under airplane load is analyzed and researched in depth though ANSYS simulation modeling analysis. The impact factor modal is established according to the comprehensive response analysis of pavement roughness, vibration condition and speed of the aircraft and vibration of the taxiway bridge structure. Using this modal, the static displacement can be calculated according to the dynamics test results. Then the normal static load test can be used to check the taxiway bridge security condition, this is a new method to test bridge structure without interrupting the traffic.The simplified algorithm used in this article to analyze the aerocraft-bridge couple, as well as the realization in ANSYS, are introduced, moreover, smoothness rank modals and the hollow modal to simulate the partial uneven of bridge surface are set up by Matlab.Based on the configuration and load rank of the existing taxiway bridge in domestic airport, taxiway bridge modals are established. Using 10 types of aircrafts whose weight are increase progressively, the factors, such as the base frequency of bridge , the smoothness of the bridge surface, to affect the impact factor and the influence rule between them are researched by ANSYS simulation computation.According to the change rule of the impact factor along with each influence factor, the impact factor modal is established by appropriate regression function.On the basis of actual measurement of number five taxiway bridges, the vibration situation of the taxiway bridge under the airplane moving load has been studied, and each influence factor of impact factor is analyzed, meanwhile, it confirms that, the impact factor formula inferred is accurate and the research technique proposed in this paper is effective.