Thus,the calculation and analysis of train running safety on the girder are made. And the main conclusion is as follows: when the freight train passes under the speed of 80km/h,transverse vibration of train-bridge time variant system is stable. That is,the train will not derail,and the train running safety on the girder is guaranteed.
To study the seismic influence on the running safety of train passing high-speed railway bridges,a dynamic model of coupled bridge-train system subjected to earthquakes is established by connecting the motion equations of the bridge under earthquakes and those of the vehicles through the nonlinear contact relations between wheels and rails,in which the nonuniform characteristics of the seismic waves input from different foundations are considered. A computer simulation program is worked out.
This paper points out the force characteristics of continuous beam arch composite bridge,introduces basic meaning and evaluation criterion of train safety,comfort and smoothness,and calculates and analyzes train running safety,comfort and smoothness of Kunyang grand bridge in Wen-fu line based on space vibration computational model of train-bridge time-varying system.
Many derailment cases on bridge show that derailment on bridges cannot be prevented with the existing limit value of steel bridge lateral rigidity. The reason is that the train running safety on bridge cannot be analyzed by means of the existing method for bridge lateral rigidity analysis.
Moreover, how to study and establish the freeway AID system is one of the core research fields in Intelligent Transportation Systems (ITS), it is urgently necessary to reduce the congestion and damage resulted from the freeway incident, ensure the vehicle running safety, and avoid the second accident.
Next, shows the system structure of TOAS,works out the whole logic model and concrete function modules, explains thetechnical steps which are taken to insure the TOAS running safety, describes the basicideas about designing the user interface.
Running conditions closely related to the running safety of vehicles in forest areas and factors affecting using performance are analyzed and a battery of measures are put forward to ensure running safety in forest areas.