Sumiaki Ohtsuyama

The vibration of the bogie and the car body becomes remarkable with the speedup of the train, and there are effects, such as safety, riding comfort, rails or ground facilities. This is a very important problem. The problem of vibration in railway vehicles is a very important matter in terms of safety and riding comfort, and a detailed analysis is required. Our experiment was carried out using the roller rig model equipment in 4 kinds of wheel tread gradient (1/10 to 1/40). The vibration of the railway vehicle is mainly caused by wheels and bogies running on the rail, and it is transmitted to the car body. Of great concern is the danger of derailment, when the hunting occurs at high speed and it has an adverse effect on riding comfort. In this paper, the hunting or phenomenon of railway vehicle generated at high running speed in comparison to low speed is verified using the roller rig model equipment. The purpose of this study is to clarify the relation with the natural vibration of the car body from the viewpoint of the bogie hunting phenomenon.

1928年に創立された「大阪鉄道学校」の設立の経緯とその後の大学移行について概観し、そこで行われた鉄道教育を振り返り、今後のあるべき姿を展望した。

現在鉄道駅での車いす利用時は、乗車時に駅員による渡し板設置と付き添え人が必要だが、前方大車輪式車いすを使うことで単独乗降が容易になる。また、段差等価勾配角度の導入により定量的に乗降可能な段差高さを検証した。

We aim to propose a wheelchair that can be utilized at the time of a disaster or after disaster.It is possible to reduce the load exerted on the body by using a tire with less electric sassistance or less resistance.

An analysis of railway vehicle behavior was carried out using the roller rig model.In particular,this included checking for hunting.Changing the whell tread gadient,some experiments were conducted,and a comparison was made with the hunting theoretical value.