Dynamics modeling and lateral stability of tank transport vehicles

In this paper,the equivalent elliptic gauge pendulum model of liquid sloshing in tank is established,the pendulum dynamic equation of tank in non-inertial frame of reference is derived,and the dynamics model of tank transporter is constructed by force analysis of the whole vehicle.A liquid tank car model was built in TruckSim to study its dynamic response characteristics.Aiming at the problem that the coupling effect between liquid sloshiness in tank and tank car can easily affect the rolling stability of vehicle,the roll dynamics model of tank heavy vehicle is established based on the parameterized equivalent elliptic gauge single pendulum model,and the influence of different lateral acceleration and suspension system on the roll stability is studied.The results show that the coupling effect between the motion state of the tank car and the liquid slosh lengthens the oscillation period of the liquid slosh in the tank,and the amplitude of the load transfer rate of the tank car increases with the increase of the lateral acceleration,thus reducing the stability of the vehicle.In addition,the study also pointed out that the liquid viscosity mainly affects the transient response of the vehicle,which is manifested in that the steady-state response time of the vehicle is shortened and the overshoot is reduced with the increase of the liquid viscosity,and this effect is more significant when the tank length axis ratio is increased.In summary,this study not only reveals the key mechanical characteristics of tank transporters during dynamic driving,but also provides optimization suggestions for different liquid filling ratios and tank shapes,providing an important reference for improving the stability and safety of tank vehicles.