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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Modelling of nonlinear hunting instability for a high-speed railway vehicle equipped by hollow worn wheels
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Modelling of nonlinear hunting instability for a high-speed railway vehicle equipped by hollow worn wheels

机译：带空心轮的高速铁路车辆非线性寻迹不稳定性建模

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One of the reasons for frequent vibrations of coaches and hunting instability are hollow worn wheels. The main purpose of this paper is to investigate the effect of the wheel surface hollowing on the inconstancy and vibrations of a wagon. Considering the nonlinearity of the hollow surface, as well as both single and double point wheel-rail contacts are the significant points of this study. In order to do this, 800 wheel profiles of 100 coaches were measured in a controlled manner in a period of six months as an infield study. Statistical methods were used to categorize the measured hollow wheel profiles and select eight of the most observed ones. Then, a nonlinear mathematical model of a high-speed railway vehicle with 21 degrees of freedom was used for dynamic analysis of a wagon equipped by the hollow worn wheels on a tangent track. In order to model the effect of hollowing on the dynamic behaviour of the vehicle, the nonlinearity of wheel profile was taken into account. Also, both single and double point wheel-rail contacts were considered for accurate modelling of the wheel-rail interaction forces. Based on the results of the study, the tread hollowing must be considered as an independent dimensional parameter in periodic inspections. Also, it was concluded that worn wheels should be inspected regularly and re-profiled before their false flanges exceed a limit of 2mm, in order to prevent the hunting phenomenon, and ensure being away from derailment of a passenger railway vehicle. Validation of the mathematical modelling was performed through the modelling of vehicle in ADAMS/Rail and comparing the results.
机译：教练经常振动和打猎不稳定的原因之一是空心磨损的车轮。本文的主要目的是研究车轮表面打孔对货车的不稳定性和振动的影响。考虑到空心表面的非线性以及单点和双点轮轨接触都是本研究的重点。为了做到这一点，在六个月的时间内，以受控的方式测量了100个教练的800个车轮轮廓，作为现场研究。统计方法用于对测得的空心轮轮廓进行分类，并从中观察到最多的八个。然后，将具有21个自由度的高速铁路车辆的非线性数学模型用于对切线轨道上装有中空磨损车轮的货车进行动力分析。为了模拟空心现象对车辆动态行为的影响，考虑了车轮轮廓的非线性。同样，单点和双点轮轨接触都被考虑用于轮轨相互作用力的精确建模。根据研究结果，胎面挖空必须在定期检查中视为独立的尺寸参数。此外，得出的结论是，应定期检查磨损的车轮，并在其假法兰超过2mm的限制之前对其进行重新轮廓处理，以防止出现摆动现象，并确保远离客车的脱轨。通过在ADAMS / Rail中对车辆进行建模并比较结果来进行数学建模的验证。

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