车-液耦合响应下液罐车稳定性控制仿真

为了提高液罐车行驶安全性、减少液罐车侧翻、失稳所带来的危害,对于液罐车在转向或换道时车-液耦合动态响应对整车稳定性的影响进行了研究。联合液体纳维斯托克斯和流动控制方程,应用计算流体动力学软件ANSYS/Fluent建立并求解液体晃动模型,通过结合液体晃动模型和三自由度液罐车刚体模型获得液罐车车-液耦合动力学模型,分析有无控制策略情况下,液体晃动对液罐车横向稳定性的影响。仿真结果表明:提出的模糊差动制动控制策略能够有效提高车辆抗侧翻能力,减少罐车运输过程中交通事故的发生,对液罐车运输有指导意义。

Simulation of stability control of tank trucks under vehicle-liquid coupling response

In order to study the influence of vehicle-liquid coupling dynamic response on the vehicle stability when the tank truck is turning or changing lanes, a liquid sloshing model was established and solved by computational fluid dynamics software ANSYS/Fluent together with liquid Navier-Stokes and flow control equations. Combining the liquid sloshing model and the rigid body model of the three-degree-of-freedom tank truck, the vehicle-liquid coupling dynamics model of the tank truck was obtained, and could be used to analyze the influence of liquid sloshing on the lateral stability of the tank truck with or without control strategy. The simulation results show that the fuzzy differential braking control strategy, which can effectively enhance the side rollover resistant capability of a vehicle and reduce the probability of traffic accidents during tank truck transportation, will be of guiding significance for tank truck transportation.