Abstract
Purpose. The paper is devoted to dynamic characteristics evaluation of the locomotive with prospective design and determination the feasibility of its use on the Ukrainian railways. Methodology. The methods of mathematical and computer modeling of the dynamics of railway vehicles, as well as methods for the numerical integration of systems of ordinary nonlinear differential equations were used to solve the problem. Findings. The calculated diagram of a locomotive on three-axle bogies was built to solve the problem, and it is a system of rigid bodies connected by various elements of rheology. The mathematical model of the locomotive movement, allowing studying its spatial vibrations at driving on straight and curved sections of the track with random irregularities in plan and profile was developed with use of this calculated diagram. At compiling the mathematical model took into account both geometric (nonlinearity profile of the wheel roll surface) and physical nonlinearity of the system (the work forces of dry friction, nonlinearity characteristics of interaction forces between wheels and rails). The multivariate calculations, which allowed assessing the dynamic qualities of the locomotive at its movement along straight and curved sections of the track, were realized with the use of computer modeling. The smoothness movement indicators of the locomotive in horizontal and vertical planes, frame strength, coefficients of vertical dynamics in the first and second stages of the suspension, the load factor of resistance against the derailment of the wheel from the rail were determined at the period of research. In addition, a comparison of the obtained results with similar characteristics is widely used on the Ukrainian railways in six-axle locomotive TE 116. The influence of speed and technical state of the track on the locomotive traffic safety was determined.Originality. A mathematical model of the spatial movement of a six-axle locomotive with prospective design, taking into account the peculiarities of its design was developed. Evaluation of dynamic characteristics at the carriage movement along a track of arbitrary shape was made. Practical value. The developed mathematical model of the six-axle locomotive movement can be used at conducting research on development of advanced locomotives designs.
Highlights
ОЦЕНКА ДИНАМИЧЕСКИХ ПОКАЗАТЕЛЕЙ ШЕСТИОСНОГО ЛОКОМОТИВАЦель работы заключается в оценке динамических качеств локомотива перспективной конструкции при его движении по прямолинейным и криволинейным участкам железнодорожного пути и определение возможности его использования на железных дорогах Украины
В настоящее время техническое состояние тягового подвижного состава Украины не в полной мере отвечает требованиям, предъявляемым к современным транспортным системам
The paper is devoted to dynamic characteristics evaluation of the locomotive with prospective design and determination the feasibility of its use on the Ukrainian railways
Summary
Цель работы заключается в оценке динамических качеств локомотива перспективной конструкции при его движении по прямолинейным и криволинейным участкам железнодорожного пути и определение возможности его использования на железных дорогах Украины. Где βcz , βcy – коэффициенты вязкого трения в центральном подвешивании в вертикальном и горизонтальном поперечном направлениях соответственно; βaz – коэффициент вязкого трения в буксовом подвешивании в вертикальном направлении; βψ – коэффициент вязкого трения при взаимных поворотах кузова относительно рамы тележки в плане; ∆ – относительные скорости перемещений тел, связанных диссипативными элементами. Леса в точке контакта; αij – угол между касательной к профилю поверхности колеса в точке контакта и поперечной осью y ; εij – относительная скорость проскальзывания j -го колеса i -ой колесной пары по рельсу (крип); εxij , ε yij – продольная и поперечная составляющие относительной скорости проскальзывания j -го колеса i -ой колесной пары по рельсу;
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