Rollover Threshold of Partially Filled Tank Vehicles with Arbitrary Tank Geometry

Abstract

Rollover threshold limits of partially filled tank vehicles equipped with tanks of arbitrary cross-sections are estimated using a simple methodology. Overturning moment caused by the lateral liquid shift within a partially filled arbitrary tank geometry is obtained as a function of the tank shape, fill level and the gradient of the free surface of liquid. The liquid load shift computed using a set of closed-form equations, developed based on the tank shape and fill level, is compared to those obtained from a comprehensive software developed based on a numerical technique. The static rollover threshold of the tank vehicles with arbitrary tank shapes are estimated by balancing the total overturning moment against the restoring moment. The results are compared to those obtained from a kineto-static analysis of tank vehicles.

Roll dynamics and lateral load transfer estimation in articulated heavy freight vehicles

“…Equation ( 9) is a well suited form of the calculation of the LLT Ai coe cient from equation (6). Namely, the longitudinal wheel slip s x estimation is practically realizable on a real vehicle.…”

“…Estimation of the wheel longitudinal slip on each axle side and transformation to the friction coe cient according to equation ( 9) enables the lateral load transfer estimation for the particular driving axle according to equation (6). The lateral load transfer for the whole tractor unit LLT A is then determined as an averaged sum of the lateral load transfers of both driving axles:…”

“…While these two parameters are of fundamental importance for any vehicle, a larger number of parameters in uences the SRT. The vehicle SRT can be assessed by simulations, but often it is simpler to determine it experimentally [3][4][5][6]. Recently, an on-board system has been developed that estimates the SRT by taking into account the vehicle loading conditions [7].…”

Análisis bidimensional de la estabilidad de vehículos pesados tipo carro-tanque

“…En este sentido, los principales modelos de estabilidad desarrollados utilizan cargas fijas para determinar el factor de estabilidad o Static Rollover Threshold (SRT) [4], [5], [6]. Sin embargo, para varios investigadores es importante determinar como el porcentaje de llenado de los carro-tanques y el movimiento del fluido transportado pueden afectar el cálculo del factor de estabilidad [7], [8], [9]. El presente artículo presenta las siguientes secciones: en la segunda sección se hace un análisis bidimensional del movimiento lineal del fluido bajo la acción de una aceleración lateral, en la tercera sección se hace un análisis bidimensional de la estabilidad de un carrotanque, lo que permite definir un factor de estabilidad para este tipo de vehículos, en la cuarta sección se realiza un estudio de caso en el que se varía el nivel de llenado del tanque, y por último se detallan las conclusiones del trabajo realizado.…”

Study on Driving Stability of Tank Trucks Based on Equivalent Trammel Pendulum for Liquid Sloshing

“…Considering the complexity of tank vehicle dynamic analysis-as tank vehicles are fluid-solid coupling multibody systemsome important simplifications have to be made before the analysis. Strandberg et al assumed that liquid free surface is a tilted straight line whose gradient is a function of vehicle's lateral acceleration and tank's roll angle [10][11][12][13]. Based on that, the center of gravity (CG) of liquid bulk can be obtained, and a quasi-static (QS) dynamic analysis of vehicle driving stability can be carried out.…”