Probabilistic analysis of processes of accumulation of damages at the action of the static and cyclic loadings

Abstract

Difficult character of cooperation of constructive elements with environment, and also among themselves, the casual nature of durability of materials and service conditions of engines demand in calculations on durability of application of probabilistic methods of the analysis and use of indicators of the theory of reliability. In-process created and grounded probabilistic approach to the durability’s reliability of elements of constructions of GTE analysis. The methods of probabilistic description of characteristics of durability of materials of details and probabilistic estimation of static and cyclic damaged of the controlled details are developed for a flight cycle. The probabilistic approachs are explored to the calculation of long-statical, high- and low-cyclic tireless damaged of details of engines and accumulated damaged on the basis of methods of the linear and nonlinear summation of damages as sums of independent and dependent casual sizes, casual sequences and casual processes. As a result, it is possible to estimate basic probabilistic characteristics of accumulated damageability and numbers of cycles for which accumulated damageability exceeds a critical level. The methodology for estimation of resource and other indicators of operability of CE AC (GTE) according to known probabilistic characteristics of accumulated damageability is developed.