Abstract
The tank truck had stability very poor during movement due to affecting of internal vibration of the liquid in tank. So to assess the rollover stability of a circular tank truck in case of double lane change maneuver corresponding to each liquid level in the tank, the research investigated the load transfer ratio (LTR) value and the roll angle of suspension. The paper used the Lagrange method for the quasi-static model of the circular tank and the D'Alembert's principle for the roll model of the vehicle. Then the system of differential equations for rollover stability was built from the two models above. The simulation results showed that when the vehicle moves at a speed of 100 km/h corresponding to the liquid level height of 0.4, 0.8 m compared to the tank diameter, the vehicle was rolled causing danger to people and property. Therefore, during the tank truck operation, the driver should noted the vehicle movement speed and it is necessary to propose speed limit warning signs along the road.
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