• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Aerodynamics and ventilation of tunnels. >Pressure gradients during train entry - Practical design data
【24h】

Pressure gradients during train entry - Practical design data

机译：列车进入过程中的压力梯度-实用设计数据

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Predictions of rates of change of pressure caused by trains entering tunnels with simplernportals are presented in sufficient detail for use to be made of them in practical tunnelrndesign. The analytical method is not new; it is the work of MS Howe and collaborators.rnHowever, the results are presented in a form that is more accessible to most engineersrnthan the mathematical expressions used by Howe to present extensive work in a concisernform. It is shown that the maximum rate of change of pressure for trains with short nosesrnis almost independent of the nose length (provided that they are suitably rounded), butrnthat rates of change reduce with increasing nose length. Detailed data are presented inrngraphical and tabular form for three generic nose shapes and a practical method of usingrnthe data for non-generic shapes is proposed. The overall purpose of the paper is tornprovide a simple means of avoiding the need for resource-intensive calculations in designrnstudies where it is not obvious a priori whether special precautions will be needed atrntunnel entrances to prevent the radiation of unacceptable MPWs from tunnel outlets.
机译：充分详细地介绍了列车通过简单入口进入隧道所引起的压力变化率，以供在实际隧道设计中使用。分析方法不是新方法；这是MS Howe及其合作者的工作。然而，结果的显示方式比大多数工程师以Howe的形式以简洁的形式展示广泛的工作时，大多数工程师更容易获得。结果表明，短鼻翼火车的最大压力变化率几乎与前鼻梁长度无关（假设它们适当地变圆了），但是随着前鼻梁长度的增加，变化率减小。给出了三种通用鼻形形状的表格和表格形式的详细数据，并提出了一种将数据用于非通用形状的实用方法。本文的总体目的是提供一种简单的方法，从而避免在设计研究中不需要进行资源密集型计算的情况，因为在先验条件下是否需要在隧道入口处采取特殊预防措施以防止不可接受的MPW从隧道出口辐射并不明显。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号