| Project/Area Number |
06650277
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Dynamics/Control
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SUDA Yoshihiro University of Tokyo, Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (80183052)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | corrugation / wavy formation by wear / rolling contact / contact vibration / creepage / wear / vibration / Vibration / Damping / Corrugation / Contact mechanics / Contact vibration / High damping matarial / High damping alloy |
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| Research Abstract |
The mechanism of corrugation phenomena on the rolling contact has not been cleared in detail. This phenomenon is wavy surface deformation after repeated contacts such as rail surface, roller of mill, and causes sever vibration and noise. This study is to clear the mechanism and find the solution to prevent.
Experimental study of corrugation developed has been carried out using a corrugation simulator. This simulator can apply longitudinal and lateral creepage on rolling contact surfaces and measure vibrations, creepage, and surface deformations simultaneously throughout the corrugation development under longitudinal and lateral creepage.
The following results were obtained : Creepage vibration coupled with vertical vibration has been observed. The wear rate determined by these coupled vibrations agreed well with the deformation of the surface profile. Therefor, the cause of this type of corrugation is periodic wear caused by the coupled vibration between vertical vibration and creepage vibration.
In the experiments, the assumption of the rolling contact of two wheels is applied but the corrugation of the rail is also considered. The rail supported by the tie and the traveling wheel are identified to the elastically supported beam and the discrete spring-mass system. The coupled natural frequency of the system is affected by the contact spring, so it is important to consider this effect for corrugation studies.
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