High-frequency vertical wheel-rail contact forces - Validation of a prediction model by field testing
High-frequency vertical wheel-rail contact forces - Validation of a prediction model by field testing
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DOI：
10.1016/j.wear.2008.02.038
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发表时间：
2008-10-30
期刊：
影响因子：
5
通讯作者：
Nielsen, Jens C. O.
中科院分区：
文献类型：
--
作者：
Nielsen, Jens C. O.
自20世纪80年代后期以来，CHARMEC开发的计算机程序DIFF用于模拟高频（约20 Hz至至少2000 Hz）下的垂直车辆-轨道相互作用。两个现场测试活动的测量结果被用来验证车辆-轨道相互作用模型。第一个测试案例涉及来自车轮扁疤的冲击载荷，而另一个案例研究了波纹钢轨对动态垂直轮轨接触力的影响。比较了四种车辆模型和两种粘弹性轨道模型。根据实验室和现场测试的测试数据对轨道模型进行了校准。钢轨和车轮粗糙度的输入数据来自现场测量。对于低于2000 Hz的大多数频率，在幅度和频率含量方面，观察到计算的和测量的垂直接触力之间的良好一致性。最好的协议时，获得使用车辆模型，占两个轮对在转向架，而不是使用一个单一的轮对模型。(C)2008 Jens C.O.尼尔森Elsevier B. V.出版，保留所有权利。
The computer program DIFF,which is being developed at CHARMEC since the late 1980s, is used to simulate vertical vehicle-track interaction at high frequencies, from about 20 Hz to at least 2000 Hz. Measured results from two field test campaigns are used to validate the vehicle-track interaction model. The first test case involves impact loads from a wheel flat, while the other case studies the influence of a corrugated rail on dynamic vertical wheel-rail contact forces. Four vehicle models and two visco-elastic track models are compared. The track models are calibrated versus test data from laboratory and field tests. Input data on rail and wheel roughness are taken from field measurements. Good agreement between calculated and measured vertical contact forces is observed, both with respect to magnitude and frequency content, for most frequencies below 2000 Hz. The best agreement is obtained when using a vehicle model that accounts for both wheelsets in a bogie, instead of using a single wheelset model. (C) 2008 Jens C.O. Nielsen. Published by Elsevier B.V. All rights reserved.