Abstract: During the steering process of the tank vehicle, the sloshing of the liquid in tank will produce a lateral impact force and roll moment. Taking the non-full-loaded liquid tank as the research object, the VOF model is used to numerically analyze the liquid sloshing under steering conditions, and the influence law of lateral acceleration and filling ratio on the liquid sloshing is obtained. The lateral dynamics model of the tank vehicle is established, and the simulation results show that the rollover threshold of the tanker is the smaller when the filling ratio is 50%-70%. The internal structure of the tank body is optimized, and an inverted V-shaped anti-wave plate is designed to reduce the impact of liquid on the tank wall. The sloshing reduction effect of nine inverted V-shaped anti-wave plates at different filling ratios is studied, and the results show that installing three V-shaped anti-wave plates with an included angle of 150° has the best anti-sway effect. In order to simulate the roll state of the tank vehicle, the electric hydraulic cylinder is used to lift the whole steel plate plane and the sliding table. At the same time, the sliding table drives the tank body to move in the opposite direction to correct the position of the center of mass, so as to reduce the liquid lateral shaking force and roll moment and improve the lateral stability of the tank vehicle.

Key words: tank vehicle, rollover threshold, lateral dynamics, center of mass