The specific load-carrying capacity and mass of trailers as means of flax stock transportation

Abstract

According to the technology of harvesting flax stock and under the conditions of transporting rolls from the field to the places of raw storage or to the points of their primary processing, along with other transportation means tractor and transportation units consisting of tractor of various classes and tractor trailers of the corresponding load-carrying capacity and tractor trains are used. During the research the trailers were divided into 2 groups. The first group consisted of the trailers produced in the factories of the former Soviet Union and the second group comprised trailers produced abroad. The samples of the 1st and 2nd groups included 15 and 21 trailer models each. The correlation between their nominal load-carrying capacity and mass of transportation means was accepted as the specific mass of trailers. The variation scale of the nominal load-carrying capacity of trailers from the 1st and 2nd groups amounted to 2-13 and 5-24 t respectively, the mean arithmetic values and average deviation amounting to 6.0 and 3.3 13.2 and 6.0 t respectively. The variation scale of the mass of trailers from the 1st and 2nd groups amounts to 0.7-6.34 and 1.2-7.1 t respectively, and their mean arithmetic values and mean square deviations being 2.8 and 3.6 2.1 and 1.6 t accorder to the same sequence. The specific load-carrying capacity of the 1st group trailers varied from 1.85 to 2.83, and of the 2nd group-from 3.38 to 5.50. The mean arithmetic value and the square mean deviation of the 1st division group of trailers amounted to 2.27 and 0.30, and of the 2nd group of trailers-from 4.29 to 0.58 respectively. According to the specified Student-ttest and Fisher’s ration-test criteria the compared totalities of the specific load-carrying capacity of tractor trailers of various producers prove statistically different in both mean arithmetic values and dispersions. Between the specific load-carrying capacity of tractor trailers of the 1st and 2nd groups and their mass one can reveal the negative correlation amounting to minus 0.701 and minus 0.434 respectively. It has been found out that depending on the mass of trailers the change in the specific weight of their load-carrying capacity can be presented by the equations of negative slope-intercept form of the equation of a straight line. As for the trailers produced in the factories of the former Soviet Union and abroad, the equation absolute terms were 2.63 and 4.78 respectively. The slope-intercept forms of the equation amounted to 0.133 and 0.153 respectively. Taking into account the equation absolute members one can indirectly maintain that on the average the specific loadcarrying capacity of trailers of foreign production as compared to domestic production trailers. A 1.82 times higher. The above must be taken into account when designing and producing tractor trailers with the aim of decreasing their materials and metal specific consumption that will contribute to their eco-oriented use under transporting load in general, and flax stock in particular