Generalized dynamic model of hydrodynamic vibration dampener subject to viscous damping

Abstract

Use as an elastic body of the working fluid improves the efficiency of the hydraulic damper, reliability, and durability, in this case, the issues of improving the reliability of existing locomotives hydraulic dampers by upgrading separate the components for major repairs with the extension of the useful life are relevant. To increase the efficiency of damping dynamic vibrations and reduce the load on the support units and running gear elements, a modernized design of a hydro friction damper with improved damping properties was developed, for which an application was filed for the Patent of the Republic of Uzbekistan for Invention No. IAP 2021 0002.

Numerical and analytical method of calculation of dynamic strength of modernized air springs for high-speed electric trains

“…Then, in this article a numerical-analytical model was developed for the dynamic calculation of the side wall of the elastic shell of a modernized air spring in the form of a plate with a mesh frame; this model is a logical continuation of the calculation methods proposed in [7][8][9][10].…”

Calculation of dynamic characteristics of elastic self-aligning gear wheel of the locomotive

“…𝐺𝐺 𝑅𝑅𝑅𝑅 = 2 𝐺𝐺 𝑅𝑅𝑅𝑅 = 2 • 70343 = 140686 Н/cm or 𝐺𝐺 𝑅𝑅𝑅𝑅 = 14068,6 Н/mm (10) Thus, according to the formula (1), the tangential force at the radius of installation of elastic elements in the SWAG at selection of radial clearance ∆ 0 = 4 mm up to the stop in the thrust elements of the rubber-metal block will be as follows…”

Method of calculation for dynamic strength of complex configuration frame structures of locomotives for transport engineering

“…The equated load-bearing frame of a locomotive of complex configuration is modeled by an elastic rod of variable cross-section with variable mass, bending and extension stiffness. The difference of the proposed model from the existing ones [9,10,13] is that it takes into account the variability of cross-section, mass, bending and extension strength along the length of the equivalent beam, which complies with the real operating conditions. In existing calculation methods, for simplicity, it is assumed that the beam is of equal resistance or an approximate calculation is performed using a model with concentrated parameters without taking elasticity into account.…”

“…In existing calculation methods, for simplicity, it is assumed that the beam is of equal resistance or an approximate calculation is performed using a model with concentrated parameters without taking elasticity into account. These approximate models in dynamics can create errors up to 150 -200 % [10] from real deformations and stresses. Therefore, in practice, it is always necessary to perform experimental studies and introduce dynamic correction factors in the strength and stability calculations.…”