走行路を考慮した連結高速走行体の地震応答挙動およびモデルの低次元化に関する検討

抄録

This paper deals with the response behavior of the high-speed-moving connected vehicles considering the running road subjected to seismic excitation. The high-speed-moving connected vehicles are modeled by a set of vehicle model that have 21 degree of freedoms. The running road is modeled by spring, mass and damper system that have 1 degree of freedom in each direction. We assumed bridge as the running road. We investigated the effect of the running road on the behavior of the vehicle by getting response behavior of the vehicle. As a result, seismic waves’ predominant frequency changed through the running road and the response behavior of the vehicle changed, too. Also, if we calculate the behavior of the connected vehicles, calculation cost and degree of freedom considerably increase. So, it is necessary to construct the reduced order model. So far, we constructed the reduced order model using modal analysis by repeating try and error. However, it was difficult to select vibration modes which influenced the safety of the vehicle on the running road during the earthquake. So, we propose the method that can select the vibration modes which influenced the safety of the vehicle on the running road during the earthquake automatically. The method adopted the theory of sparse estimation. As a result, the reduced order model using sparse estimation can reproduce the original model enough. In addition, the reduction of calculation cost and vibration modes can be expected very much, so we can simulate efficiently by using the reduced order model.