摘要
为研究轨轮谐波位移激励对车轮高阶多边形几何激励的模拟效果,文章利用仿真分析软件建立了转向架高频激振试验台的轮-轮滚动接触有限元模型,求解了速度440 km/h、波深0.05 mm的20阶多边形激励下的轮-轮滚动振动行为,并在时域和频域内对比分析了两种激励的异同。结果表明,模拟轴重17 t、速度440 km/h条件下波深为0.05 mm的20阶多边形时,位移激励和几何激励所得时域轮-轮垂向力最大值仅相差1.5%;位移激励下多边形激励频率在840 Hz处的轮-轮垂向力频谱峰值和轴箱加速度功率谱密度峰值与几何激励具有良好的一致性;位移激励下的轮-轮接触点局部曲率半径恒定导致接触斑面积偏大,进而使得接触应力偏小约21.7%;轮-轮垂向力频谱和轴箱加速度功率谱密度幅值整体随轨轮位移幅值的增大而增大,峰值频率基本不变。综上所述,在转向架高频激振试验台上可采用位移激励代替几何激励模拟车轮多边形。
To study the simulation effect of rail plate harmonic displacement excitation on wheel high-order wheel polygon geometric excitation,a wheel-plate rolling contact finite element model was developed based on simulation analysis software for the bogie highfrequency excitation test bench.The wheel-plate rolling vibration behaviors under 20th-order polygon excitation with a wave depth of 0.05 mm were investigated through a solving process at a speed of 440 km/h.A comparative analysis was then conducted in both the time domain and frequency domain to identify similarities and differences between the two excitation modes.The simulation results for a 20th-order polygon with a wave depth of 0.05 mm,under an axle weight of 17 t and a speed of 440 km/h,show that the maximum timedomain wheel-plate vertical force differed by only 1.5%between displacement excitation and geometric excitation.The spectral peak of wheel-plate vertical forces and the power spectral density(PSD)peak of axle box accelerations at the polygon excitation frequency of 840 Hz under displacement excitation are in good agreement with those under geometric excitation.The constant local curvature radius at the wheel-plate contact point under displacement excitation results in a larger contact spot area and a corresponding 21.7%reduction in contact stress.The amplitude of the wheel-plate vertical force spectrum and the power spectrum density of axle box accelerations increase with higher rail plate displacement amplitudes,while the peak frequency is basically unchanged.In summary,wheel polygon can be effectively simulated using displacement excitation as an alternative to geometric excitation on the bogie high-frequency excitation test bench.
作者
吴威威
丁昊
贺冠强
李榆银
秦宇杰
周鸿敏
WU Weiwei;DING Hao;HE Guanqiang;LI Yuyin;QIN Yujie;ZHOU Hongmin(Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou,Hunan 412001,China;Hangzhou Metro Group Co.,Ltd.,Hangzhou,Zhejiang 310000,China)
出处
《机车电传动》
2025年第1期42-49,共8页
Electric Drive for Locomotives
基金
国家重点研发计划项目(2021YFB3400700)。
关键词
试验台
多边形
谐波位移
轮-轮接触力
接触应力
共振
高速动车组
有限元法
test bench
polygon
harmonic displacement
wheel-plate contact force
contact stress
resonance
high-speed EMU
finite element method
作者简介
通信作者:吴威威,男,硕士,主要从事轨道车辆非标试验台方面的研究,E-mail:wuww1@csrzic.com。
