Abstract: The traditional ISO dynamic comfort evaluation could only measure the vibration comforts qualitatively and the comfort of the highspeed train when seat and body separated. A nonlinear human bodyseat coupled simulation model with seven degrees of freedom is established considering the annoyance rate， which subjects to irregular excitation of a railway with speed of 350km/h. The model is simulated by annoyce rate， and its result is compared with that of the ISO evaluation method. The result shows that the ride comfort evaluation based on the annoyance rate model can compensate the defects of the traditional method， and the result of the evaluation can be quantitative.

Key words: highspeed train, dynamic comfort, annoyance rate, coupled simulation model, ride comfort