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| Similarity Relationship of Fretting Amplitudes Between Scaled-Model Wheel-Set and Prototype Wheel-Set |
| ZENG Fei-1, 2 , CHEN Guang-Xiong-1, ZHOU Zhong-Rong-1 |
| (1. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China; 2. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621000, China) |
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Abstract In order to provide a reference for designing model tests and analyze the results of the model tests, the similarity relationship of fretting amplitudes of the interference fitting surfaces between the prototype wheel-set and its geometrically similar scaled-model one was deduced based on the dimensional analysis theory. The material of the prototype wheelset was the same as that of the scaled-model one. The results show that when the size of the model wheelset, the interference value and the axle load are 1/n, 1/n and 1/n2 of those of the prototype one respectively, the fretting amplitudes of the interference fitting surfaces of the model wheelset is 1/n of that of the prototype one. Finally, the fretting amplitudes of scaling 1∶2, 1∶5, and 1∶10 model wheelsets were compared with those of the prototype one from ANSYS analyses, respectively, which verifies the correctness of the similarity relationship.
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Received: 22 June 2011
Published: 28 May 2012
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