液体冲击影响下的汽车罐车纵向稳定性研究

发布时间：2018-01-20 01:55

本文关键词： 汽车罐车液体冲击纵向稳定性制动稳定性 FLUENT仿真　出处：《吉林大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着我国经济发展,交通运输行业蓬勃发展,货运量日益增加。汽车罐车作为运载液体货物的最佳运输工具,其应用也就越来越广泛。由于液体货物的存在,使得汽车罐车在行驶时,纵向稳定性发生了较大的变化,容易造成交通事故。对汽车罐车的纵向稳定性的研究愈来愈多。国内外都有相关的研究,并取得了一定的成果。掌握了汽车罐车在液体冲击影响下的纵向稳定性,可以为汽车罐车驾驶人的安全驾驶提供有利的理论保证,避免一些交通事故的发生。同时可对安全体系的建立和辅助驾驶的研究提供理论基础。因此,本文的具体研究工作如下:1、在确定汽车罐车罐体参数后,对罐内液体冲击动力学进行建模。用弹簧-质量模型来代替罐内液体的冲击运动。给出了冲击力的函数表达式,并给出了一种求解该模型的方法。2、在确定罐体参数后,建立的罐内液体冲击运动的弹簧-质量模型,来表征罐内液体的冲击运动。3、制动时的纵向稳定性是纵向稳定性的一个重要组成成分。在研究汽车罐车的制动时的纵向稳定性时,首先通过影响因素分析确定了本文的研究对象。并给出了制动时的纵向稳定性评价指标——有效制动减速度的表达式。4、利用FLUENT软件进行了仿真模拟,得到了有效制动减速度表达式中的纵向冲击力的值。然后通过运算得到了不同初速度、不同初始制动减速度、不同充液比条件下的汽车罐车制动时的纵向稳定性。分析得到了初速度不是影响汽车罐车制动时纵向稳定性的影响因子,初始制动减速度和充液比是影响汽车罐车制动时纵向稳定性的重要参数。最后根据动态分析,验证了仿真模拟的可信性和真实性。
[Abstract]:With the development of China's economy, transportation industry booming, growing demand. As a tanker carrying liquid cargo best transport, its application is more and more widely. Because of the existence of liquid cargo, the tank car in the road, the longitudinal stability had great changes, likely to cause traffic accidents. More and more on the longitudinal stability of tanker. Related research at home and abroad, and achieved certain results. The longitudinal stability of tank car in the liquid under the influence of the impact, the driver can for tank car driving safety guarantee favorable theory, to avoid traffic accidents. At the same time can provide theory based on safety and driver assistance system. Therefore, the specific research work of this paper is as follows: 1, in determining the parameters of tank truck, tank liquid The impact dynamics modeling. The impact motion using spring mass model instead of the liquid tank. The expressions are given as a function of impact, and presents a method of solving the model of.2, in determining the parameters of tank, liquid spring shock motion established tank mass model, impact motion.3 fluid characterization the tank, longitudinal stability when braking is an important component of longitudinal stability. The longitudinal stability research in braking tanker when the research object of this paper is determined firstly through the analysis of the influencing factors. And gives the brake longitudinal stability evaluation index, effective braking deceleration of expression.4 use the FLUENT simulation software, effectively reducing braking force in the longitudinal impact velocity values. Then the influences of the initial velocity is obtained by calculation, different initial braking deceleration, Different filling ratio of longitudinal stability of tank vehicles under braking. The analysis of the factors affecting the stability of the initial velocity is not vertical tank car braking effect, initial braking deceleration and liquid filling ratio is an important parameter affecting the truck braking stability. According to the longitudinal dynamic analysis, verified the simulation and authenticity.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.61

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