摘要
基于国内外轨道高低不平顺功率谱密度拟合函数,通过编程数值计算分别对比研究了普通线路谱和高速线路谱对行车平稳舒适性、安全性、轮轨动力效应的影响。结果表明,铁科院干线谱和原长沙铁道学院谱激励下列车的平稳舒适性略优于美国六级谱,而前者的轮轨动力效应介于美国六级谱和美国五级谱之间,后者则与美国六级谱相当;时速120 km等级普通线路谱和时速160 km等级提速线路谱引起的列车行驶平稳性介于美国五级谱和六级谱之间,轮轨动力效应与美国六级谱较一致;铁科院郑武线高速谱和时速200 km等级提速线路谱引起的列车平稳舒适性介于德国高干扰谱和低干扰谱之间,而前者引起的轮轨力大于德国轨道谱,后者则与德国低干扰谱相当。同时采用三角级法给出各轨道谱的时域样本,作为车辆-轨道垂向耦合动力分析模型的轮轨激励输入,仿真计算了青藏客车YZ25T在普通轨道谱激扰下以时速90 km/h行驶和高速轨道谱激励下以时速200 km/h行驶时的轮轨竖向作用力,较好地验证了基于轨道谱密度函数的轮轨力效应分析结果。研究成果可为列车行驶振动反应分析中轮-轨不平顺激励谱的选择提供参考。
Based on the previous studies on fitting functions of power spectrum density（PSD） of track vertical irregularity,the different effects of common and high-speed track spectra on the performance of train,such as running stability,safety and wheel-track dynamic response,have been compared.The results indicate that the running stability of the TKY main line spectrum and the CSTDXY track spectrum is superior to that of the American track spectrum of sixth grade,while the wheel-track dynamic response resulted from TKY main line spectrum lies between those induced by the fifth and sixth grade American track spectra,and the dynamic response induced by the CSTDXY track spectrum is almost identical with that by the sixth grade American track spectrum;the running stability induced by the spectra of 120 km/h and 160 km/h classification,respectively,all lie between those from the sixth and fifth grade American spectra,and the wheel-track forces are almost identical with the sixth grade American spectrum;the running stability of TKY high-speed spectrum and the spectrum of 200 km/h classification is in the middle level compared with German track spectra of high interference and low interference,and the wheel-track force induced by German interference track spectra,which was comparative with that induced by the latter,is smaller than the force induced by the former.Simultaneously,according to the vehicle-track vertical coupling dynamic model,applying trigonometric series method to transfer the functions of PSD into time domain samples as an input of wheel-track excitation,the wheel-track vertical forces were calculated,while the vehicle YZ25T passing by under common irregularity spectra excitation with the velocity of 90 km/h,and under high-speed spectra excitation with the velocity of 200 km/h,respectively,which can well be the validation of wheel-track dynamic effectiveness obtained by the PSD of track vertical irregularity.The results can be used for the selection of wheel-track interaction input,which can further provide
出处
《地震工程与工程振动》
CSCD
北大核心
2012年第5期33-38,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家重点基础研究发展计划第四子课题(2012CB026104)
国家自然科学基金项目(51078111
50678055)
冻土工程国家重点实验室开放基金项目(SKLFSE201007)
铁道部科学技术研究项目(2009G010-E)
关键词
轨道谱
高低不平顺
时域转化
三角级数法
轮轨力
track spectrum
vertical profile irregularity
time domain transformation
trigonometric series method
wheel-track force
