The present paper shows the development of a strategy for the calculation of the air brake forces of European freight trains. The model is built to upgrade the existing Politecnico di Torino longitudinal train dynamic...The present paper shows the development of a strategy for the calculation of the air brake forces of European freight trains. The model is built to upgrade the existing Politecnico di Torino longitudinal train dynamics(LTD) code LTDPoliTo, which was originally unable to account for air brake forces. The proposed model uses an empirical exponential function to calculate the air brake forces during the simulation, while the maximum normal force on the brake friction elements is calculated according to the indication of the vehicle braked weight percentage.Hence, the model does not require to simulate in detail the fluid dynamics in the brake pipe nor to precisely know the main parameters of the braking system mounted on each vehicle. The model parameters are tuned to minimize the difference between the braking distance computed by the LTDPoliTo code and the value prescribed by the UIC544-1 leaflet in emergency braking operations. Simulations are run for different configurations of freight train compositions including a variable number of Shimmns wagons trailed by an E402B locomotive at the head of the train, as suggested in a reference literature paper. The results of the proposed method are in good agreement with the target braking distances calculated according to the international rules.展开更多
5月16日至17日,美国高速铁路协会(US High Speed Rail Association,USHSR)在美国华盛顿哥伦比亚特区举行会议,会议介绍了美国铁路项目最近的状况,特别是对高速铁路部署的大力支持。在主题为“世界各地的高铁”的会议上,UIC负责高铁的高...5月16日至17日,美国高速铁路协会(US High Speed Rail Association,USHSR)在美国华盛顿哥伦比亚特区举行会议,会议介绍了美国铁路项目最近的状况,特别是对高速铁路部署的大力支持。在主题为“世界各地的高铁”的会议上,UIC负责高铁的高级顾问菲利普·罗兰(Philippe Lorand)分享了UIC成员在全球范围内的项目进展。除了已经投入运营的项目外,在所有区域都在扩建和发展许多铁路网,在不久的将来,高铁将成为可持续交通的关键参与因素。展开更多
欧洲铁路网(Rail Net Europe,RNE)和UIC将开展更加密切的合作,为更高效、更有竞争力、更加数字化、更具有可持续性的欧洲铁路系统做出贡献。RNE是由欧洲铁路基础设施管理者组成的协会,在运力管理、运输管理、走廊管理和IT领域,欧洲铁路...欧洲铁路网(Rail Net Europe,RNE)和UIC将开展更加密切的合作,为更高效、更有竞争力、更加数字化、更具有可持续性的欧洲铁路系统做出贡献。RNE是由欧洲铁路基础设施管理者组成的协会,在运力管理、运输管理、走廊管理和IT领域,欧洲铁路网使其成员的国际流程相互协调,重点关注数字化解决方案,从而支持与国际铁路运输相关的运营流程。2023年1月25日,RNE主席保罗·玛扎陶德(Paul Mazataud)和UIC总干事弗朗索瓦·达韦纳(Fran?ois Davenne)在巴黎UIC总部签署了一份谅解备忘录,正式确定双方将加强合作。展开更多
文摘The present paper shows the development of a strategy for the calculation of the air brake forces of European freight trains. The model is built to upgrade the existing Politecnico di Torino longitudinal train dynamics(LTD) code LTDPoliTo, which was originally unable to account for air brake forces. The proposed model uses an empirical exponential function to calculate the air brake forces during the simulation, while the maximum normal force on the brake friction elements is calculated according to the indication of the vehicle braked weight percentage.Hence, the model does not require to simulate in detail the fluid dynamics in the brake pipe nor to precisely know the main parameters of the braking system mounted on each vehicle. The model parameters are tuned to minimize the difference between the braking distance computed by the LTDPoliTo code and the value prescribed by the UIC544-1 leaflet in emergency braking operations. Simulations are run for different configurations of freight train compositions including a variable number of Shimmns wagons trailed by an E402B locomotive at the head of the train, as suggested in a reference literature paper. The results of the proposed method are in good agreement with the target braking distances calculated according to the international rules.
文摘欧洲铁路网(Rail Net Europe,RNE)和UIC将开展更加密切的合作,为更高效、更有竞争力、更加数字化、更具有可持续性的欧洲铁路系统做出贡献。RNE是由欧洲铁路基础设施管理者组成的协会,在运力管理、运输管理、走廊管理和IT领域,欧洲铁路网使其成员的国际流程相互协调,重点关注数字化解决方案,从而支持与国际铁路运输相关的运营流程。2023年1月25日,RNE主席保罗·玛扎陶德(Paul Mazataud)和UIC总干事弗朗索瓦·达韦纳(Fran?ois Davenne)在巴黎UIC总部签署了一份谅解备忘录,正式确定双方将加强合作。
