RESULTS OF MULTIVARIATE EXPERIMENT TO DETERMINE DEPENDENCE OF THE MAXIMUM PRESSURE OF TRACTOR WHEELS ON THE SOIL FROM TRACTOR’S PARAMETERS AND PHYSICAL AND MECHANICAL PROPERTIES OF SOIL. ANALYSIS OF THE EQUATIONS

Kamil Khafizov; Ramil Khafizov

doi:doi:10.12737/article_592fc87648e2b5.26544976

UDC 63

RESULTS OF MULTIVARIATE EXPERIMENT TO DETERMINE DEPENDENCE OF THE MAXIMUM PRESSURE OF TRACTOR WHEELS ON THE SOIL FROM TRACTOR’S PARAMETERS AND PHYSICAL AND MECHANICAL PROPERTIES OF SOIL. ANALYSIS OF THE EQUATIONS

Published в Vestnik of Kazan State Agrarian University · Volume 11, Issue 4, 2017 · Pages 99–103 · Rubrics: Tehnicheskie nauki

DOI 10.12737/article_592fc87648e2b5.26544976

Received: 05.05.1905 Accepted: 05.05.1905 Published: 05.05.1905 Language of publication: RUS

Authors

Kamil Khafizov ¹ · Ramil Khafizov ²

1 Kazan state agrarian University (Cars and Power plants Department, Professor)

2 Kazan State Agrarian University (Tractors, cars and power plants Department, Associate Professor)

ABSTRACT

During statistical processing of proceeding of several variants of experiments the equation of maximum pressure of tractor wheels on the soil were obtained, depending on the tractor parameters and physical and mechanical properties of the soil. This paper analyzes the influence of the main factors on the maximum amount of wheels pressure on the ground. We revealed performance of equations beyond the experimental values of the factors. With an increase in the width of the wheel profile, its diameter, the speed of the tractor, the maximum pressure of wheel on the ground is reduced, and with increasing tractor’s weight on one wheel, the soil hardness, the pressure in wheel tire the maximum pressure of wheel on ground increases. Comparison with the data, available in the domestic and foreign journals, showed that the most stable prediction results of maximum pressure value of tractor wheels on the ground are obtained by using the first equation in the article. The prediction error of wheels maximum pressure values is in the range of 3 to 15%, depending on the brand of tractor and its working conditions.

KEYWORDS

wheel pressure on the ground tractor’s parameters soil hardness soil density the diameter of the wheel the width of a tire a load on wheel pressure in tire the regression equation.

Information Text References

Authors:

1. Kazan state agrarian University (Cars and Power plants Department, Professor)

2. Kazan State Agrarian University (Tractors, cars and power plants Department, Associate Professor)

Type:

Article

Pages:

from 99 to 103

Status:

Published

Subject area:

UDC 63

Language:

Russian

Keywords:

wheel pressure on the ground, tractor’s parameters, soil hardness, soil density, the diameter of the wheel, the width of a tire, a load on wheel, pressure in tire, the regression equation.

Text

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Анализ полученных уравнений. Для выявления работоспособности полученного уравнения (1) проведем расчеты при изменении основных факторов в пределах их возможного варьирования. Результаты расчетов с использованием СКМ МАТЛАБ приведены на рисунках 1 - 5.

Исходные данные для расчета:

D=1.6 м; p_w=1.0*10⁵ Н/м²; H=15*10⁵ Н/м²; ρ_п=1300 кг/м³.

Как видно из рисунка 1, максимальное давление колеса на почву находится в линейной зависимости от ширины профиля колеса и нелинейной зависимости от массы трактора, приходящейся на одно колесо. Причем, с ростом ширины профиля колеса – максимальное давление колеса на почву уменьшается, а с ростом массы, приходящейся на одно колесо, увеличивается.

Рисунок 2 показывает, что максимальное давление колеса на почву находится в нелинейной зависимости и от диаметра колеса и от массы трактора, приходящейся на одно колесо. Причем с ростом массы трактора, приходящейся на одно колесо, максимальное давление колеса на почву растет и растет тем интенсивнее, чем больше диаметр колеса.

References

1. Khafizov R.N. Method of crop energy calculating, lost due to the negative impact of propulsion. [Metod rascheta energii urozhaya, poteryannogo iz-za negativnogo vozdeystviya dvizhiteley]. // Vestnik Kazanskogo gosudarstvennogo agrarnogo universiteta. - The Herald of Kazan State Agrarian University. 2015. № 3 (37). P. 81-85.

2. Khafizov R.N. Methods of complex experiment to determine the dependence of the tractor propellers pressure on the soil according to the tractor parameters, propeller and mechanical properties of the soil. [Metodika mnogofaktornogo eksperimenta po opredeleniyu zavisimosti davleniya dvizhiteley traktora na pochvu ot parametrov traktora, dvizhitelya i fiziko-mekhanicheskikh svoystv pochvy]. // Vestnik Kazanskogo gosudarstvennogo agrarnogo universiteta. - The Herald of Kazan State Agrarian University. 2015. № 3 (37). P. 86-92.

3. Khafizov K.A., Khafizov R.N. Results of multivariate experiment to determine dependence of the maximum pressure of tractor wheels on the soil from tractor’s parameters and physical and mechanical properties of soil. Statistical analysis. [Rezultaty mnogofaktornogo eksperimenta po opredeleniyu zavisimosti maksimalnogo davleniya koles traktora na pochvu ot parametrov traktora i fiziko-mekhanicheskikh svoystv pochvy. Statisticheskiy analiz]. // Vestnik Kazanskogo gosudarstvennogo agrarnogo universiteta. - The Herald of Kazan State Agrarian University. 2016. № 4 (). P. 84-96.

4. Zolotarevskaya D.I., Dzhafari Naimi K., Lyadin V.P. Change of rheological properties and soil compaction under the influence of wheel propulsion. [Izmenenie reologicheskikh svoystv i uplotnenie pochvy pri vozdeystvii kolesnykh dvizhiteley]. // Traktory i selskokhozyaystvennye mashiny. - Tractors and agricultural machinery. 2007. № 5. P. 33-37.

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RESULTS OF MULTIVARIATE EXPERIMENT TO DETERMINE DEPENDENCE OF THE MAXIMUM PRESSURE OF TRACTOR WHEELS ON THE SOIL FROM TRACTOR’S PARAMETERS AND PHYSICAL AND MECHANICAL PROPERTIES OF SOIL. ANALYSIS OF THE EQUATIONS

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