Mathematical Model for Calculation of Oscillations in the Main Bearing Frame of Railcar with Changing Stiffness and Physical Parameters

Abstract

This article covers the use of analytical technique of solutions for flexural and longitudinal oscillations of the bearing framework of a railcar body frame in the form

Improving the delivery of wagon shipments by mathematical-statistical methods

“…After calculating the numerical descriptions of the statistical series, we proceed to select the distribution curve that describes this distribution relatively fully. The distribution corresponding to this curve is called the theoretical distribution [10][11][12][13][14][15][16][17].…”

“…When processing statistical data on cargo transportation and analyzing them, the number of observations in the sample n can be found according to the following formula [3,14]:…”

“…where  k is the number of group intervals;  s is the number of independent (non-dependent) conditions (assumed to be for normal distribution [13][14][15][16][17][18][19][20]).…”

Analysis of the Market Development of Transport and Cargo-Carrying Services in The Republic of Uzbekistan

“…The dynamics of these indices is shown in Figure 4. As seen from Figure 4, the average transportation speed in 2021 dropped, and the average travel time increased; this increased the expenses of the carrier and the customer and reduced overall efficiency [8]. One of the reasons for these changes was the insufficient capacity in the points where cargo containers change gauge, as well as the insufficient infrastructure along the route and the lack of cargo facilities [9 -12].…”

Multivariate Analysis and Assessment of Reliability of Power Equipment of Self-Propelled Rolling Stock of the Railways

“…Как и в любых сложных технических объектах с вопросом надежности СCПС связаны следующие практические задачи: статический анализ и оценка по результатам многолетних наблюдений действующей установки, прогнозирование и нормирование оптимальной надежности, рациональный выбор технических решений при их создании и эксплуатации [1]. Особенностью анализа и оценки оптимальной надежности СCПС и его установок, в отличие от обычных объектов, является то, что сбор информации об этом объекте целесообразно начинать после первого капитального ремонта, так как СCПС имеют уникальную конструкцию и используются в небольшом количестве [2].…”