A review of methods to measure and calculate train resistances
A review of methods to measure and calculate train resistances
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DOI：
10.1243/0954409001531306
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发表时间：
2000-07
期刊：
影响因子：
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通讯作者：
B. Rochard;Felix Schmid
中科院分区：
文献类型：
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作者：
B. Rochard;Felix Schmid
摘要本文讨论了一种众所周知的工具，用于计算火车抵抗运动性及其适用于高速描述操作的适用性。该工具最初由阿姆斯特朗（Armstrong）和斯威夫特（Swift）[1]开发，还允许估计火车建筑各种特征的空气动力学抗性的贡献。他们将这种方法与其他用于计算火车阻力的公式的结果以及在实验工作期间进行的已发表测量值进行了比较。得出的结论是，可以认为阿姆斯特朗和斯威夫特的表达方式可为戴维斯方程的系数提供良好的估计，用于适合英国装载量规的高速和郊区火车，并且具有1：3或更少的电动汽车乘客比率无需拆卸测试。但是，表达式不适合具有动力轴优势的火车。
Abstract This paper discusses a well-known tool for calculating train resistance to motion and its suitability for describing operations at high speed. The tool, originally developed by Armstrong and Swift [1], also permits the estimation of the contribution to aerodynamic resistance of various features of the architecture of a train. They compare this approach with the results of other formulae for calculating train resistance, as well as published measurements taken during experimental work. It is concluded that Armstrong and Swift's expressions can be considered to provide good estimates for the coefficients to the Davis equation for both high-speed and suburban trains that fit the British loading gauge and have a power car-trailer ratio of 1:3 or less without the need for run-down testing. However, the expressions are not suitable for trains with a predominance of powered axles.