A super large centrifuge foundation was buried inthe soft soil. the vibration characteristics research was very necessary andimportant. The equivalent soil spring model and structure-soil coupling modelwere established to compare and analyze the vibration characteristics based on differentfoundation simulation methods. The dynamic time history analysis was carriedout base on the white noise excitation

to analyze the influence of thefoundation participating mass on the vibration characteristics. The resultsshow that: (1) The first two modes of the super-large centrifuge foundation arehorizontal and vertical swings.(2) The vibration modes obtained by differentfoundation simulation methods are consistent

and the natural frequencydifference is within 3%. (3) The foundation participating mass of the first twomodes are 1.376 times and 0.998 times the total foundation mass respectively; consideringthe influence of the foundation participating mass

the vibration responseamplitude of the structure is reduced by about 50%

and the peak frequency ofthe spectrum is reduced by about 2 Hz. The conclusions have guiding and referencesignificance for the vibration research of the embedded large scale powermachine foundation.