Abstract: Aiming at the measurement and analysis of the nonlinear steady state sloshing force and torque dynamic signal of liquid in a cylindrical tank, an experimental device that can simultaneously realize the fixed installation of the liquid filled tank and the measurement of the dynamic sloshing force and moment of the liquid is designed and the corresponding experimental data acquisition, analysis and processing methods are presented. Then, a number of experiments are performed, meanwhile, the experimental data and the CFD simulation results have been compared meticulously, and the results show that the latter results have obvious calculation deviations under the rotating sloshing state. So the CFD simulation will not be convenient to be independently used in correctly revealing the actual characteristics of liquid sloshing in the tank. Finally, the nonlinear steady state sloshing behavior of the liquid in the tank is summarized when the lateral external excitation frequency is changed, and the nonlinear standing wave sloshing, nonlinear beating sloshing, and multiple types of complex rotating sloshing are compared, and the effects of different sloshing forms on the execution efficiency and stability of the vehicle control system are analyzed, respectively.

Key words: Cylindrical tank, Nonlinear steady state sloshing, Dynamic characteristics, Experimental device, Rotation sloshing