基于实测数据的高铁道岔区轮轨作用性能研究OA
Research on the performance of wheel-rail interaction in high-speed railway turnouts based on measured data
为揭示高铁线路道岔区轮轨作用性能随车辆通过速度及线路运营时间的变化规律,以高速线路上一组18号道岔作为考察对象,采用实测轮轨力和轨道不平顺数据分别从时域、频域研究车辆通过目标道岔区时轮轨相互作用特征,分析道岔区空间形位、轮轨作用力、车辆平稳性等指标的分布特性,厘清尖轨、心轨等结构上轮轨作用的能量分布频段,并引入0～400 Hz频段上轮轨力广义能量表征道岔区轮轨力作用性能的速变和时变指标.结果表明,道岔区轨道高低和轨向的标准差、脱轨系数、轮轴横向力等随通过速度变化较小.当通过速度在260～350 km/h时,轮重减载率随速度变化较快,而当通过速度在350～380 km/h时,轮重减载率变化不大.尖轨附近左侧及心轨附近右侧轮轨垂向力广义能量随车辆通过速度的增大而较快增加,轮轨横向力广义能量随车辆速度变化不大,前者增速约为后者的5倍.随着道岔服役时间的增加,道岔区高低和轨向标准差先减少后增加,轮重减载率和轮轴横向力则先增加后减少再平缓增大,道岔区轮轨横向力和轮轨垂向力平均广义能量增大.其中,尖轨和心轨附近左侧轮轨垂向力广义能量在0～17月内减少,而后在21～38月缓慢增加;2号和4号接头附近右侧轮轨垂向力广义能量值在0～9月内有所减小,10～20月内略微平稳后再在21～38月内缓慢增加.研究成果可为运营期道岔区轮轨作用性能演化机制、道岔区轨道状态变化规律、道岔部件养护维修等提供数据参考.
To reveal the performance of the wheel-rail interaction in the turnouts on high-speed railways,the measurement of wheel-rail forces and track irregularity on a selected turnout was studied in the time and frequency domains in relation to running speed and operating time.The distribution characteristics of track irregularity,wheel-rail force and vehicle stability indicators were analyzed,and the main energy bands of wheel-rail interaction in the special turnouts such as switches and crossing noses were clarified.The generalized energy of wheel-rail force in the frequency range of 0～400 Hz was introduced to characterize speed-varying and time-varying characteristics.The results show that the standard deviation of track profile and alignment,the derailment coefficient,and the lateral wheel-axle force vary insignificantly with speed.However,the wheel-load reduction rate changes rapidly within the speed range of 260～350 km/h,whereas it remains relatively constant within the speed range of 350～380 km/h.The generalized energy of the left wheel-rail vertical force near the switch rail and the right wheel-rail vertical force near the crossing nose increases rapidly with speed.In contrast,the wheel-rail lateral forces change slightly with the speed,and the former increases at a rate about five times greater than the latter.As the service time of the turnout increases,the standard deviation of the profile and alignment first decreases and then increases.Meanwhile,the wheel-load reduction rate and the lateral wheel-axle force first increase,then decrease,and finally increases genthy.The generalized energy of the wheel-rail lateral and vertical forces increases.Near the switch and crossing nose,it first decreases within 0～17 months after railway operation,and then slowly increases between 21 and 38 months.The generalized energy of the wheel-rail forces in the right rail near the No.2 and No.4 joints decrease within 0～9 months,and stabilize slightly within 10～20 months,then increases again within 21～38 months.The research can provide a detailed reference for the wheel-rail performance in the turnouts in the interaction mechanisms,the service status,management,maintenance and treatment,etc.
牛留斌;孙鹏田;田新宇
中国铁道科学研究院集团有限公司 基础设施检测研究所,北京 100081中国铁道科学研究院集团有限公司 研究生部,北京 100081中国铁道科学研究院集团有限公司 基础设施检测研究所,北京 100081
交通工程
高速铁路道岔轮轨力小波变换广义能量速变、时变特性
high-speed railway switchwheel-rail forcewavelet transformgeneralized energyspeed and time-varying characteristics
《铁道科学与工程学报》 2026 (4)
1497-1510,14
国铁集团重大课题项目(K2024T006)
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