Some Features of Calculating Durability of Machine Components and Parts

Abstract

The practice of trucking enterprises shows that, depending on the nature of the work performed, as a rule, there is not only the mandatory priority of several criteria, for example, when choosing a car, but also the need to obtain differentiable values of the coefficients of relative importance for a given level of efficiency. For example, when it is necessary to take into account a number of properties simultaneously, each of which is determined by a set of its indicators, and it is required to optimize the process of their implementation. In this case, it is necessary to obtain balanced values of the coefficients of relative importance following the tasks’ objectives. A scientific approach to solving this problem dictates the need to decide on not one, but several performance indicators.

Particular attention has been paid to the calculation of the durability distribution function at the design stage and the prototype development. The prospect of the Monte Carlo method for assessing the resource has been justified. An example of calculating the function of the distribution of the durability of a part under variable loads in various operating modes is given. The computed data obtained by the method proposed in the work are confirmed experimentally, which allows us to consider the possibility of using the method to assess the probability of destruction of mechanical systems. The method's universality determines its scope for various components and machine parts (bearings, gears, shafts, etc.).