Abstract
The roll dynamics model of a liquid tank vehicle is developed by integrating an equivalent mechanical analogy model of the liquid cargo to the roll plane model of a heavy commercial vehicle. The mechanical analogy model of the fluid slosh is represented through an equivalent pendulum system derived from the potential flow theory for a cylindrical tank. The non-linear vehicle model equations are derived in the roll plane of the tank vehicle by the use of Lagrang’s equations. The fluid-vehicle interaction is hence dynamically coupled in order to investigate the directional behavior of the tank vehicle during typical highway maneuvers. Computer simulations are performed on the dynamic roll model of the tank vehicle under various fill conditions and dynamic maneuver conditions. The roll response of the tank vehicle is then compared to that of an equivalent rigid cargo vehicle to study the impact of fluid slosh behavior. The influence of fluid fill level, loading conditions and vehicle characteristics on the dynamic roll performance of the vehicle is also investigated.
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