Analysis of Dynamic Properties and Movement Safety of Bogies with Diagonal Links and Rubber-Metal Vibration Absorbers Between the Rubbing Elements of Freight Cars

Abstract

This article aims to study experimentally the dynamic properties and traffic safety actions for gondola cars with bogies with diagonal links, operated on the territory of the Republic of Kazakhstan. The main results obtained during tests of gondola cars on bogie with diagonal links when they move along straight and curved sections as well as on switches are presented. The estimation of: dynamics coefficients, stability margin coefficients against derailment, lateral forces transmitted from the wheel to the rail, ratio of frame forces to a static load from the wheelset on the rails, and accelerations are made. The paper analyses the simulation of a polymer layer of rubber vibration absorber, to be installed between the rubbing surfaces, such as the link side of frame axle unit, and host unit is open-bearing, with lateral support of the three-piece freight car bogies, operating on the territory of the Commonwealth of Independent States. The model developed in this article consists of a rheological model of a Maxwell cell, a Fancher spring and an element which has the function of non-linearity. The simulation model can be used to study the characteristics of vibration dampers, gaskets and other power elements that have polymer properties and are installed at other types of transport and not only.

Situational Modernization: Dynamic and Strength Characteristics of a Passenger Wagon Universal Design

“…The equivalent stress of the center beam for the 1st version in the area of the pivot beam was 105 MPa, with gradual dissipation closer to the center of the wagon up to 6 MPa, and for the 2nd version 125 MPa, at the junction with the pivot beam and dissipation up to 13 MPa closer to the center of the wagon. As can be seen from (see Figure 5 b), the tension of the center beam for version 2 is maintained along the entire length, while for version 1 the tension is closer to zero [21].…”

“…3 weelsets, left acceleration of the passenger wagon body [21][22]. The graph (see Figure 21) shows the 1st and 3rd wheelsets of the wagon in the direction of travel.…”

Analysis of dynamic instability of the wheel set of a railway vehicle using the method of generalized hill determinants

“…( 7). The condition existence of a nontrivial solution system is that its determinant is equal to zero [3]. Thus, the characteristic exponents h are roots of the algebraic equation:…”

“…Note that under sufficiently broad assumptions about properties matrices 𝐺 and 𝐻 the infinite determinant turns out to be convergent. Consequently, reduction to determinants of finite order is allowed [3]. Now we take into account the third harmonic in solving the Mathieu equation:…”

Analysis of forced oscillations of wheelset bouncing from multiplicative perturbation specified by harmonic function

“…Let us study the influence of external force perturbation on the parametric system, assuming that there is no physical connection between them. In other words, the excitation sources are independent of each other [3]. This will allow us to obtain an analytical solution to the problem and establish some preliminary information, for example, regarding the phase shift angle between force and parametric effects.…”