Article

Received 16.03.2022

Revised 21.07.2022

Accepted 22.08.2022

Retrieved from Vol. 26, No. 3, 2022

Pages 291 -300

Popelysh, D. (2022). To determination of transverse stability of a tank car. The National Transport University Bulletin, 26(3), 291-300. https://doi.org/10.33744/2308-6645-2022-3-53-291-300

To determination of transverse stability of a tank car

D. Popelysh

The article defines the indicators of lateral stability of a tank truck in the form of a circle, ellipse and suitcase and analyzes the factors that affect it. The object of the study - the indicators of the lateral stability of the tank truck in the form of a circle, ellipse and suitcase. The purpose of the work is a comparative analysis of the indicators of lateral stability for different body shapes of the tank car. Research methods - analytical, comparative. Calculations of transverse resistance against overturning of tank cars are carried out at full filling of tanks. To take into account the decrease in the lateral stability of the car when moving and dynamic shocks of the liquid in the case of partial filling of the tank, the permissible coefficient of lateral stability is increased by 20%. For such filling the indicators of transverse stability for the tank car KrAZ-5401H2 with a volume of 8000 l with a cross section in the form of an ellipse, a circle, a suitcase are determined. According to the results of calculations, it was found that the largest angle of the slope for a tank car in the shape of a circle and an ellipse is almost the same and 12% smaller compared to a tank truck in the shape of a suitcase. Therefore, the influence of tank parameters on the lateral stability of the tank car in accordance with DSTU UN / ECE R 111-00: 2002 was further considered. tanks in comparison with freight and passenger transport. It is shown that as a result of the action of the transverse component of the force of inertia, the center of mass of the liquid load is shifted, which leads to a change in the indicators of transverse stability. With increasing speed there is an increase in the displacement of the center of mass of the liquid in the tank and the deterioration of the transverse stability of the tank truck. Moreover, the difference between the maximum allowable radii of rotation of a fully filled tank and filled to half increases and at a speed of 70 km / h reaches 30%. However, the shape of the cross section of the tank when it is partially filled to a lesser extent affects the value of the limiting radius of rotation. The largest deviation of the turning radius from the shape of the cross section of the tank at a speed of 50 km / h occurs when filling the tank at the level of 50% and is only 7.8%. When choosing the shape of the cross section of the tank should focus on other indicators, in particular the strength of the tank and the technology of its manufacture.

 

car; tank; circuit; ellipse; suitcase; liquid cargo; stability; turn radius; speed
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https://doi.org/10.33744/2308-6645-2022-3-53-291-300