A Comparison of 3D and 2D FE Frictional Heating Models for Long and Variable Applications of Railway Tread Brake

Abstract

The article proposes two 3D and 2D numerical FE models of frictional heating for the estimation of temperature distributions in railway tread brake in 1xBg configuration during repeated long-term braking. The results of computations were compared with the time courses of temperature measured using thermocouples throughout the duration of the tests on a full-scale dynamometer for two different brake shoe materials in combination with a steel wheel. The resulting temperature distributions calculated using the proposed models agreed well with the experimental measurements, and the maximum difference in temperature values does not exceed 20%. It has been proven that 2D FE model can be as efficient as 3D model to estimate the temperature distribution during long-term and variable braking in the considered friction node. The differences in the calculation of the temperature values using these models did not exceed 3%, and the calculation time for the 2D model, compared to the 3D model, was shorter approximately 85 times for the braking cycle lasting 5032 s, and approximately 45 times for the braking cycle lasting 3297 s.

Influence of the Additive of Ceramic and Intermetallic Powders on the Friction Properties and Temperature of the Wet Clutch Disc

“…Such finite elements generated the most accurate results without the need to use an extremely fine mesh in the area of high temperature gradients. An experience in the construction of a finite element grid was obtained from previously conducted simulations of heat generation in disc brakes [ 25 ] and tread brakes (wheel-rail) of railway vehicles [ 26 ]. It was found that the linear finite elements significantly falsify the calculations (over 20%) even at many times higher than the default mesh density.…”

Methodology of estimation of temperature mode in the 2xBgu type railway braking system

“…The above compositions of the mixtures have already been used in the stand tests for the 1xBg braking system. The papers [18,22] contain extended information on their material, and tribological and mechanical characteristics. The bench test on a full-scale inertia dynamometer was carried out at the Railway Institute in Warsaw (Fig.…”

“…During long-lasting and repeated braking, the treads of railway wheels are subjected to complex mechanical and thermal loads [18]. In order to prevent excessive damage to the brake system components, in particular the wheel, it is important to understand the mechanisms and operating conditions that increase the undesirable processes that affect these phenomena.…”

Analytical Model of the Frictional Heating in a Railway Brake Disc at Single Braking with Experimental Verification

“…So far, various 3D FE models of frictional heating in friction elements that account for their complicated geometry have been proposed and examined [ 11 , 12 , 13 , 14 , 15 ]. A comparative numerical analysis of temperature in the solid and ventilated railway brake discs is presented in the study [ 14 ].…”

“…To remedy this, the temperature changes in the circumferential direction can be ignored in the formulation of the problems, obtaining the axisymmetric 2D models. A comparison analysis of the three- and two-dimensional FE frictional heating models has been conducted for a railway tread brake in the study [ 13 ]. It has been proven that an axisymmetric 2D model can be almost as efficient as a 3D model to estimate the temperature distribution during repeated long-term braking mode.…”