In this study, we constructed a train running analysis model in consideration of only the linear shape of turnouts in order to evaluate train running safety on turnouts easily. Moreover, we also constructed an automatic creation tool of a simple model for creating simple turnout models automatically by setting conditions for determining the linearity of turnouts. We could create arbitrary shapes of turnouts easily and evaluate train running safety on turnouts in advance by using the tool. We created a turnout model and carry out a trial calculation and compared the calculation result with the result of past running tests. As a result, we found that the calculation result and the running test result were roughly equivalent. From this, we could utilize the train running analysis model and the automatic creation tool for the investigation of the new structure of turnouts. In the future, we would expand the tool by adding such input items on excess width of the track gauge and track irregularity.
When disaster happens in a closed space such as a subway, collecting information can be dangerous. Consequently, it is necessary to develop robots to explore in dangerous places for people. In previous studies, there were robots that could move using the subway rail. However, that robot is not able to travel a turnout. The purpose of this study is to develop robots that able to gather information during a disaster in a subway by traveling through a rail including turnouts. In this paper, we describe the design of rail traveling robot with branching mechanism and the proposal of branching mechanism.
Object detection function of turnout and switch mechanism is one of an important function for safety of railway system. An object between a tongue rail and a stock rail on a turnout is detected by a lock mechanism of a switching machine and circuit controllers, which are applied on high-speed railway. Designer of switch mechanism has checks his detecting function design by experiments, which were sole way to check it, using real turnout and switch mechanism. In this paper, we described an equation of motion of the switch mechanism and the turnout using multi-body dynamics and flexible multi-body. Moreover, we described a method, which calculate shape of tongue rails inserted an object between rails. By results of calculations, we confirmed that the proposed method could simulates the shape of rails, which is affected by object. Computing time is 40% shorter than an experiment, however, the result includes an error which causes that the model was assumed deformation of tongue rails as 2-d deformation.