PSI - Issue 20

4

V.I. Kuksova / Structural Integrity Procedia 00 (2019) 000 – 000

V.I. Kuksova / Procedia Structural Integrity 20 (2019) 98–102

101

Fig. 1. Main directions and conditions of formation of effective systems of technical diagnostics.

reduce the costs of maintaining equipment in working condition; an increase in the average time between repairs (increased productivity and reduced maintenance costs);

actual elimination of unforeseen refusals (increased reliability and efficiency); elimination of an excessive expense of details (replacement of serviceable parts); reduce the volume of renewals (issue of warning of need of the order of renewals); increased safety (decrease in probability of unforeseen refusals); increase in efficiency of productions; increases in non-failure operation, reduction of restoring time; increase availability and technical use; improvements of indexes of a longevity, etc.

An important index of safe operation of OD is the sum of losses, prevented from reducing accident rates OD as a result of functioning of STD. The sum of the prevented losses, depending on branch specifics, is defined by the extent of the prevented losses from decrease of number of refusals as a result of work of a system, the prevented accidents and emergency on potentially dangerous objects, etc. In a general view, STD «contribution» to decrease in an accident risk and risk from operation of OD can be estimated on the basis of the following functional:

min ( )

( ) D R D R

opt R

.

(2)

1

2

Using the Ropt functional in the development of a special system of technical diagnostics allows optimizing the costs of creating and operating STD taking into account the possible level of risk of its accident (refusal).

4. Increasing of the efficiency of STD Practice shows that the inefficiency of STD is, as a rule, caused by discrepancy of characteristics (parameters) of