首页|Experimental and numerical investigation into development mechanism of wheel polygonalization
Experimental and numerical investigation into development mechanism of wheel polygonalization
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NSTL
Elsevier
? 2022 Elsevier LtdThe polygonal wear is a significant concern in railway engineering, and the mechanism behind it remains elusive. In this study, the polygonal wear on a specific metro line in China is analyzed. The 7th-order and 8th-order wheel polygonal wear are commonly measured on the metro, in which corresponding excitation frequency is located in the 44.3–58.9 Hz interval at the operating speeds of 60–70 km/h. Meanwhile, an obvious natural resonance at 50.7 Hz is found by analyzing the acceleration of axle box, which is verified by the eigen analysis of the corresponding metro track. Moreover, the vehicle-track coupling model with polygonal wheel is established to analyze the vertical wheel/rail forces induced by polygonal wear. The result indicates that the P2 resonance is the main contributor to the high amplitude vertical wheel/rail forces, which is also the main factor for development of polygonal wear after formation.
Field testsMetroP2 resonancePolygonal wheelSteel spring floating slab track
Mu J.、Zeng J.、Huang C.、Sun Y.、Sang H.
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State Key Laboratory of Traction Power Southwest Jiaotong University
NSTL
Elsevier
