基于液固双向耦合的罐式半挂车侧翻阈值辨识  

Identification of rollover threshold value of tank semi-trailer based onliquid-solid coupling

作　　者：孙文财[1] 李伟建 张景海[1] 王海利[2] 杨威 温雪 SUN Wen-cai;LI Wei-jian;ZHANG Jing-hai;WANG Hai-li;YANG Wei;WEN Xue(College of Transportation,Jilin University,Changchun 130022,China;Department of Computer Science,Shandong College Information Technology,Weifang 261061,China)

机构地区：[1]吉林大学交通学院,长春130022 [2]山东信息职业技术学院计算机系,山东潍坊261061

出　　处：《吉林大学学报（工学版）》2020年第4期1387-1395,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2017YFC0804804);吉林省科技发展计划项目(20180101074JC);吉林省教育厅“十三五”科学技术项目(JJKH20190152KJ)。

摘　　要：为了研究动态条件下液体晃动对于罐式半挂车侧倾稳定性的影响,基于Trucksim和Fluent建立了液固双向耦合仿真模型,并推导了其瞬时液体质心运动轨迹求解方程,在双移线工况下针对不同充液比、不同车速得出侧向力和侧倾力矩变化曲线,分析了液固耦合变化规律;利用微元法思想提取了液体质心,得出了不同充液比下罐内液体质心运动轨迹变化规律,并选取车辆侧倾角和侧向加速度作为侧翻阈值指标对罐式半挂车在该工况下的侧翻阈值进行辨识。结果表明:在充液比较低时,液体晃动对罐式半挂车侧倾稳定性影响占主导地位,且在充液比0.6左右时其侧翻阈值最低,在较高充液比范围液体总质量对车辆侧倾稳定性影响较大。研究结果可为后续罐体优化设计及防侧翻控制策略开发提供理论参考。In order to study the influence of liquid sloshing on the stability of tank semi-trailer under dynamic conditions,a two-way liquid-solid coupling simulation model was established based on Trucksim and Fluent,and the equation for solving the instantaneous liquid centroid trajectory was deduced. The curves of lateral force and roll moment are obtained for different filling ratios and different vehicle speeds.The variation law of liquid-solid coupling is analyzed. The liquid centroid is extracted by the idea of microelement method,and the liquid centroid trajectories in the tanks with different filling ratios are obtained.The vehicle roll angle and lateral acceleration are selected as the rollover threshold indicators to identify the rollover threshold of the tank semi-trailer under this condition. The results show that when the liquid filling is relatively low,the liquid sloshing has a dominant influence on the roll stability of the tank semi-trailer,and its rollover threshold is the lowest in the range of filling ratio of 0.6. The total mass has a greater impact on vehicle roll stability in the higher filling ratio range. The research results provide a theoretical reference for the subsequent tank optimization design and anti-rollover control strategy development.

关 键 词：车辆工程 侧倾稳定性 瞬态液体冲击 侧翻阈值辨识 

分 类 号：U469.5[机械工程—车辆工程]