罐体横截面形状对液罐车侧倾稳定性影响分析

Modified design and safety analysis of tank cross section based on roll stability

提出液罐车罐体截面形状设计方法,研究液罐横截面形状对半挂式液罐车侧倾稳定性影响,分析广泛使用的圆形截面液罐、改进的椭圆截面液罐及锥形截面液罐特点。提出两种改进的液罐截面形状,给出液罐中液体晃动产生的侧向力、侧倾力矩准静态条件的计算方法。以6轴半挂式液罐车为例计算液罐车模型的侧翻阈值、变道时横向负载转移及侧倾角响应峰值。基于准静态、动态两类指标分析该半挂式液罐车装载不同截面液罐时侧倾稳定特性。结果表明,两种改进的液罐截面形状可在较大充液比范围内提高液罐车侧倾稳定性。

The effect of tank cross-section on relative roll stability limits of a partially-filled tank trailer combination was investigated. The study includes the widely used circular and modified oval cross-sections in addition to a Reuleux triangle and two proposed modified Reuleux triangle cross-sections. The results were obtained for a six-axle tanksemitrailer combination using the TruckSim platform. The additional lateral forces and roll moment caused by the liquid cargo movement were evaluated using a quasi-static approach and integrated into the TruckSim model as an external force and a moment. The relative roll dynamic responses were evaluated, in terms of static rollover threshold, as well as the lateral load transfer and peak roll angle responses during a lane-change maneuver. The results suggest that the proposed modified Reuleux triangle cross-sections yield enhanced roll stability and roll directional performance over a wide range of fill levels.