Study of Traffic Vibration Influence Based on Complicated Ground and Traveling Conditions

By using four-DOF vehicle vibration model,the influence degree of traffic vibration was predicted completely and systematically under various conditions.Based on vibration source condition,material characteristics of wave propagation medium and wave propagation path,some parameters were selected to calculate vibration response of ground condition.Combining vehicle vibration theory with Finite Element Method(FEM) considering the viscosity boundary condition,a forecast way of traffic vibration which influenced by the spread path of vibration wave under traveling condition,pavement flatness and complicated ground condition was presented.The analysis result of an engineering example shows that(1)the reaction force shocked by vehicle tire increases in a certain extent with vehicle load and vehicle speed increase and pavement flatness comes down;(2) vibration isolation groove can effectively restrict the response of acceleration and velocity caused by traffic vibration,but it cannot relieve the response of displacement evidently.