Along with the increasing velocity and high speed development of railway,many questions have emerged,such as the aggravating abrasion in vehicle-track system,fatigue failure in key components,as well as the noises etc...Along with the increasing velocity and high speed development of railway,many questions have emerged,such as the aggravating abrasion in vehicle-track system,fatigue failure in key components,as well as the noises etc.After summarizing pinety of technique literatures,it′s found that dynamic research of vehicle-track system in high,intermediate and low frequency spectrum must be carried out.Only suing the traditional methods and without analyzing the essentiality of problems,these rising questions will not be solved reasonably.Rolated theories and experiments show that,by the difference of excitation and wavelength the complete vehicle-track system dynamics should be divided into three frequency spectrums:high,intermediate and low frequency respectively.According to the character and frequency of the three different speetrums,the dynamic model can be set up to meet the research requirements and can be solved using appropriate mathematic technique.In this way,full vehicle-track system dynamic research can be conducted based on the system frequency character.And reasonable model can be developed,which is significant to develop the high-speed railways.展开更多
文摘Along with the increasing velocity and high speed development of railway,many questions have emerged,such as the aggravating abrasion in vehicle-track system,fatigue failure in key components,as well as the noises etc.After summarizing pinety of technique literatures,it′s found that dynamic research of vehicle-track system in high,intermediate and low frequency spectrum must be carried out.Only suing the traditional methods and without analyzing the essentiality of problems,these rising questions will not be solved reasonably.Rolated theories and experiments show that,by the difference of excitation and wavelength the complete vehicle-track system dynamics should be divided into three frequency spectrums:high,intermediate and low frequency respectively.According to the character and frequency of the three different speetrums,the dynamic model can be set up to meet the research requirements and can be solved using appropriate mathematic technique.In this way,full vehicle-track system dynamic research can be conducted based on the system frequency character.And reasonable model can be developed,which is significant to develop the high-speed railways.
