Influencing factors for vehicle vibration characteristics in transition section of highway soft ground

In order to analyze the influence on vehicle vibration characteristics after settlement deformation occurred on pavement structure,a vehicles pavement coupled system was established by 1/4vehicle model with two degrees of freedom,random excitation pavement model and discrete incentive model.Take vertical vibration acceleration as indicator,influence to vehicle vibration response from pavement deformation mode,vehicle parameters,speed,travel direction and other factors were analyzed.The results show that difference of vehicle vertical vibration acceleration of different pavement deformation mode are about 32.2%to 84.6% with the same absolute settlement,vertical vibration acceleration is more sensitive to speed change when it is higher than80km/h.Pavement deformation mode and vehicle speed are major factors of influencing vehicle vibration characteristics,the settlement control standards based on vehicle vibration characteristics should consider the settlement deformation mode and speed.