Abstract
The article deals with the way of calculating tangential stresses over non-elliptical contact patch where Kalker's simplified method FASTSIM can be used advantageously. This method named FASTSTRIP is adapted for non-elliptical contact area calculated by means of the Strip method. This method is almost as quick as FASTSIM and the results are similar to the CONTACT results. This method may be useful for rail vehicles in track dynamics computation.
Highlights
The rail /wheel contact relations for purposes of rail vehicles dynamics are often calculated by means of Hertz method [1] and Kalkers simplified method applied in the program code FASTSIM [2]
Normal stresses and contact patches areas are assessed with the program code NORM [3], tangential stresses and tangential forces with the program code TANG [3]
The resultant values of our brand new procedure presented in this article are closer to calculation results achieved by Kalker’s variation method [3], while the computation speed is similar to the computation speed of FASTSIM [2]
Summary
The rail /wheel contact relations for purposes of rail vehicles dynamics are often calculated by means of Hertz method [1] and Kalkers simplified method applied in the program code FASTSIM [2]. Kalker’s variation method [3] used to be considered as an etalon for contact patch and contact stress between railway wheel and rail calculation. The computation with Kalker’s variation method takes longer time than the computation with the simplified method. The Strip method procedures [4] give more opportunities to solve the contact with respect to non-elliptical contact patch. The resultant values of our brand new procedure presented in this article are closer to calculation results achieved by Kalker’s variation method [3], while the computation speed is similar to the computation speed of FASTSIM [2]. The authors’ initial remarks on the wheel/rail tangential contact stress evaluation by means of the modified Strip method can be found in [6] and first article in [7]
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