铁道学报
鐵道學報
철도학보
2015年
4期
75-79
,共5页
长波高低不平顺%车体垂向加速度%相干函数%非参数模型%A RX模型
長波高低不平順%車體垂嚮加速度%相榦函數%非參數模型%A RX模型
장파고저불평순%차체수향가속도%상간함수%비삼수모형%A RX모형
long-wave track profile irregularity%car-body vertical acceleration%coherence function%non-parame-ter model%ARX model
轨道不平顺是车辆振动的主要激励源，随着车辆运营速度的增加，引起车辆振动加剧的不利波长也在变化。本文利用谱分析方法对0号高速综合检测列车实测数据进行分析，得到高速条件下长波高低不平顺和车体垂向加速度在空间频域上的分布规律，分别采用非参数模型和A RX模型构建长波高低不平顺与车体垂向加速度之间的关联关系，并利用系统辨识技术对两种模型的传递函数进行估计。通过将两种关联模型分别与长波高低不平顺结合，实现车体垂向加速度的预测；并与实测车体垂向加速度进行相关性和相干性分析。结果表明，两种模型均能较好反映长波高低不平顺与车体垂向加速度之间的传递关系。通过比较，A RX模型比非参数模型更精确。
軌道不平順是車輛振動的主要激勵源，隨著車輛運營速度的增加，引起車輛振動加劇的不利波長也在變化。本文利用譜分析方法對0號高速綜閤檢測列車實測數據進行分析，得到高速條件下長波高低不平順和車體垂嚮加速度在空間頻域上的分佈規律，分彆採用非參數模型和A RX模型構建長波高低不平順與車體垂嚮加速度之間的關聯關繫，併利用繫統辨識技術對兩種模型的傳遞函數進行估計。通過將兩種關聯模型分彆與長波高低不平順結閤，實現車體垂嚮加速度的預測；併與實測車體垂嚮加速度進行相關性和相榦性分析。結果錶明，兩種模型均能較好反映長波高低不平順與車體垂嚮加速度之間的傳遞關繫。通過比較，A RX模型比非參數模型更精確。
궤도불평순시차량진동적주요격려원，수착차량운영속도적증가，인기차량진동가극적불리파장야재변화。본문이용보분석방법대0호고속종합검측열차실측수거진행분석，득도고속조건하장파고저불평순화차체수향가속도재공간빈역상적분포규률，분별채용비삼수모형화A RX모형구건장파고저불평순여차체수향가속도지간적관련관계，병이용계통변식기술대량충모형적전체함수진행고계。통과장량충관련모형분별여장파고저불평순결합，실현차체수향가속도적예측；병여실측차체수향가속도진행상관성화상간성분석。결과표명，량충모형균능교호반영장파고저불평순여차체수향가속도지간적전체관계。통과비교，A RX모형비비삼수모형경정학。
Track irregularity is the main excitation source of vibration of vehicle .The detrimental wavelength that aggravates vehicle vibration changes with the increase of vehicle operation speed .On the basis of deep a‐nalysis on the measured data from Number 0 comprehensive inspection train ,spectral analysis method is applied to extract the distribution law of long‐wave profile irregularity and car‐body vertical acceleration in space fre‐quency domain under high speed condition .Nonparametric model and ARX model are introduced to describe the relationship between the long‐wave profile irregularity and the car‐body vertical acceleration ,and the transfer function between them is estimated by the use of system identification technique .The two correlation models are combined respectively with the long‐wave irregularity to calculate the car‐body vertical acceleration .The correlation and coherence analyses are done between the predicted and measured data .The results show the two models can effectively characterize the transferring relationship between the long‐wave profile irregularity and the car‐body vertical acceleration .By comparison ,the ARX model is more accurate than the nonparametric m o del .
