【正文】
【英文摘要】With the increasing velocity of lootive train, the train vibration also has increased, thus the structure fatigue life is influenced. It is meaningful to study the vibration characteristics of structure, through which we can optimize the structure of vehicles, restrain the overlarge vibration and improve the performance of vehicles. Modal test is one of the major means to obtain structural vibration characteristics. Multipoint coordinated excitation modal test can accurately identify the modal parameters of railway vehicles and improve the modal purity at the same time. Taking the vehicle as the object of study, this paper developed a multipoint coordinated excitation system, and made the structural dynamic characteristics parameter two introduced the principle of the multipoint co