Analysis Of Liquid Dangerous Goods Transport Vehicle Rollover Stability Simulation

In recent years, with the rapid growth of economy in our country, the demand for allkinds of dangerous chemical products increased year by year. Road transport ofdangerous goods is taking increasingly bigger proportion. The amount of transportationof hazardous chemicals is about300million tons annually, of which80%are conveyedby road system. According to statistics, Dangerous chemicals transportation accidentsaccounted for30%to40%of the total hazardous chemical accidents. The accidenthappened frequently in road transport of dangerous chemicals, causing great damageand potential threat to the social public security.This paper establishes the mathematical model of liquid tank vehicles, analyses theinfluence factors of roll stability, and deduces the lateral load transfer rate (LTR) as wellas rollover threshold expression. Liquid dangerous goods transport vehicles are featuredby these facts: they have large tonnage; center of mass relative to ordinary truck ishigher; wheel track relative to body height is narrow. As the cargo loaded is liquid,when the vehicle enters a curve from a straight line, the liquid cargo centroid will tilt toone side under the action of centrifugal force, so that the roll stability is greatlydecreased. This article details the calculation method of liquid centroid position underdifferent conditions, this liquid centroid position will serve as one of the importantparameters in modeling and simulation.This paper makes use of ADAMS software, follows the necessary assumptionsaccording to the template—subsystem—assembly sequence, and sets up the liquiddangerous goods transport vehicles dynamics model, the modeling process of eachtemplate has a detailed exposition. Along with the condition that our countrygovernment gradually pays attention to the highway maintenance and restricts overload,it is an inevitable trend of development that heavy-duty vehicle’s suspension air springwill definitely replace leaf spring. Since the weight of goods mainly relies on the rearaxle support, the model front axle uses leaf spring suspension while rear axle uses airspring suspension. In addition, software self-checking and steady turning test verify thecorrectness of the model.Based on the actual bend radius of highway, first class roads, second class roads, thirdclass roads, this thesis renders a simulation on the roll stability of liquid dangerousgoods transport vehicle. Make liquid dangerous goods transport vehicle loading coefficient equals0.9,0.7,0.5and0.3respectively. The article establishes the tankmodel in the CATIA software, calculates the actual liquid mass, inertia corresponding todifferent loading coefficient, and adds the quality parameters to the liquid centroid inADAMS to simulating different load, different speed, different road conditions, and theliquid sloshing situation. The simulation resulted in a finding that due to the liquidity ofliquid cargo, those vehicles suffer from worse roll stability when loading the liquidcargo, and when the loading capacity is halved, roll stability is the worst. The paperprovides further analysis of different loading coefficients of vehicle, the rollover limitturning radius at the same speed and the rollover limit speed with the same turningradius and vehicle rollover or sideslip condition on highways with different roadadhesion coefficients. Ultimately, it provides data reference for the early warning of airspring suspension liquid dangerous goods transport vehicle’s rollover.