In the article presented there are considered the mathematical expressions of requirements to safe deformation of buffer elements of wagons according to condition of the motion deceleration by shock with introduction into equation of constant quantities depending on design of the buffer mechanisms and particularities of deformation.
To determine the conditions of destructing isotropic materials under triaxial stress state more criteria are proposed and it is suggested that for determining the conditions of destructing orthotropic materials the distortion energy can be used.
The thesis studies of use position of the probability theory and statistics at solve of questions technology processes. The thesis represents the most prevailing methods and suggests methods of developing laws of function distribution of new random variables.
The process of mutual moving and contacting of surfaces of current collecting pantograph elements and contact network is considered taking into account the particularities of inf1uence of speed and acceleration parameters, determination of which will allow to forecast mathematically the wear-out degree of contacting elements.
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