The Safety Influence Of High-speed Vehicle With Earthquake

With the rapid development of high speed railway all over the world, the research on vehcile-rail-bridge interaction vribation is more and more concerned by people Accompanying, the safty and stability of the vehicle is also concerned by people. Because of the characteristic of high speed railway, the proportion of high-speed railway bridge is taking more and more. When the earthquake comes, the chance of the vehicle on the bridge is creasing. At the same time, China is the country of the high incidence of earthquake, witeh the two earthquakes of more seven magnitude on average every three years, and China is developing the construction of high speed railway. Therefore, it is very important to research the safety and stability of vehicle-rail-bridge interaction dynamics with seismic in order to prevent the derailment of vehicle.(1) By considering the two-dimensional model including the10freedom degrees of vehicle body, two bogies and four wheelsets, the vehicle motion equation is established. By using the virtual principle, the rail-bridge interaction motion equation is established. By the large mass method, ground motion is simulated. In the platform of ansys, the research is the interaction dynamics of vehicle-rail-bridge when the vehicle is running the bridge.(2) By considering the three-dimensional model including the27freedom degrees of vehicle body, two bogies and four wheelsets, the vehicle motion equation is established. The ballastless track is considered and divided into the left semi-infinite element, central finite element and the right semi-infinite element. By using the virtual principle, the rail-bridge interaction motion equation is established. By establishing the relationship of vehicle-rail by through geometric compatibility and balance of the interaction forces and obtaining the interaction element through the dynamic condensation freedom degree, the vehicle-rail-bridge interaction is achieved. By the large mass method, earthquake forces are applied to system.(3) When the vehicle is running the bridge without seismic, the analysis is vehicle-rail-bridge interaction dynamics response, in the case of the different vehicle speed and two vehicles in crossing.(4) The analysis is vehicle-rail-bridge interaction dynamics with and without seismic. The analysis is the safety and stability of the vehicle including load decrement rate of wheel weight, derailment coefficient of vehicle, vehicle body vertical acceleration, vehicle body lateral acceleration, bridge vertical displacement bridge vertical acceleration, bridge lateral displacement, bridge vertical acceleration. condensatio...