Rolling friction torque generated by time delay during stress wave transmission

被引：1
作者：
Sasaki, Shosuke [1 ]
Namba, Yohe [2 ]
Iwanari, Tadao [3 ]
Kitano, Yasuyuki [4 ]
机构：
[1] Osaka Univ, Ctr Adv High Magnet Field Sci, Grad Sch Sci, Osaka, Japan
[2] Izumo Shimane Prefectural High Sch, Izumo, Shimane, Japan
[3] Matsue Minami High Sch Supplementary Course, Matsue, Shimane, Japan
[4] Shimane Univ, Matsue, Shimane, Japan
来源：
TRIBOLOGY INTERNATIONAL | 2023年 / 186卷
关键词：
Rolling motion; Rolling friction; Torque; Train; CONTACT; MODEL;
D O I：
10.1016/j.triboint.2023.108571
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A new type of rolling resistance was discovered in Shinkansen trains. Rolling resistance at 300 km/h is four times larger than at low speeds. This increased part of the rolling resistance is proportional to the train's speed. The reason is currently unknown. This paper makes it clear. The stress in the contact area travels upwards and reaches the axle with some delay. The delay time affects the stress distribution at a high speed running. The 3Ddistributed stress approximately satisfies recurrence equations that can be solved numerically. The result reveals that the stress distribution is shifted forward from just below the wheel center. The frictional resistance calculated by this theory agrees well with the experimental values measured on Shinkansen 700 series.
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页数：12
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