铁道科学与工程学报2025，Vol.22Issue(4)：1407-1419,13.DOI:10.19713/j.cnki.43-1423/u.T20240874
时速400km级无砟轨道轮轨耦合共振及影响因素研究
Research on wheel-rail coupled resonance and influencing factors of 400 km/h ballastless track
摘要
Abstract
The 400 km/h high-speed railway is a key development direction for China's railways,and the relationship between the periodic excitation of wheel-rail system at higher speeds and the modes of ballastless track(BT)with different structural parameters remain unclear.To explore the 400 km/h+wheel-rail coupled resonance problem for ballastless track,a high-speed vehicle-BT system dynamic model considering the influence of complex excitations was established.The model was validated based on the power spectral density of the measured axle-box acceleration on high-speed railway.The wheel-rail dynamic response characteristics at higher speeds under broadband random excitation,wheel eccentricity,and periodic irregularity excitation of ballastless track were investigated,and higher speed wheel-rail coupled resonance variation law under the influence of different structural parameters of BT was analyzed.The results show that the increase in operating speed under broadband random excitation did not change the characteristics of the wheel-rail coupled resonance distribution,but only significantly exacerbated the wheel-rail broadband dynamic response amplitude.The wheel-rail system under wheel eccentricity excitation resonates in the range of 400～500 km/h,and the critical speed of resonance decreased with decreasing wheel diameter.The periodic irregularity excitation of CRTS I and III type slab BTs at the 2nd harmonic frequency pressed close to the natural frequency of wheel-rail coupled vibration at speeds of 400 km/h and 450 km/h,respectively,inducing superharmonic resonance in the wheel-rail system.The CRTS II type slab BT did not exhibit superharmonic resonance within the speed range of 500 km/h due to its long slab length.Low fastener stiffness,cushion layer on long-span bridges,and subgrade foundations reduced the wheel-rail P2 resonance modal frequency,lower the critical speed of wheel-rail coupled resonance to near 400 km/h,and exacerbated wheel-rail dynamic response at this operating speed.At a 400 km/h operating speed,special attention should be paid to these factors that may trigger wheel-rail coupled resonance.The research provides a theoretical foundation for further ensuring the higher speed wheel-rail dynamic interaction at a lower power level.关键词
更高速轮轨系统/无砟轨道/车辆-轨道耦合动力学/共振/超谐波共振Key words
higher speed wheel-rail system/ballastless track/vehicle-track coupled dynamics/resonance/superharmonic resonance分类
交通运输引用本文复制引用
马超智,赵闻强,周鹏,高亮..时速400km级无砟轨道轮轨耦合共振及影响因素研究[J].铁道科学与工程学报,2025,22(4):1407-1419,13.基金项目
国家自然科学基金资助项目(52308468) （52308468）
江苏省卓越博士后计划资助项目(2023ZB020) （2023ZB020）
中国博士后科学基金资助项目(2022M723390) （2022M723390）
