Dynamic Diagnosis Method and Maintenance Suggestions for Out-of-round Wheel of China High-speed Railway EMU
The out-of-round wheel problems on China High-speed Railway EMU is difficult to be detected with conventional methods.It could induce impact vibrations in high frequency,prompting the fatigue failure of on-board components and deformation of rails.Train performance detection system for EMU provides an effective detection method for rapid diagnosis of EMU wheel polygon.TPDS-1 adopts the dynamic monitoring scheme of ground-to-ground vehicles.By building a full continuous wheel-rail force detection platform in the high-speed running section of the main railway line,it can realize the quantitative diagnosis of EMU wheel tread damages,including local out-of-circle,low-order polygon and high-order polygon,which are invisible to the naked eye.In this paper,TPDS-1 monitoring technology is used to put forward the suggestion of wheel condition repair guided by EMU wheel condition.Compared with the existing planned repair strategy,this scheme can not only guide the timely repair of the wheels with large roughness amplitude,but also save the unnecessary waste caused by planned full-row rotary repair.It not only reduces the abnormal vibration,noise and secondary harm of EMU caused by wheel polygon,but also improves the economy of wheel rotation and repair.
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