Technical Diagnostics and Non-Destructive Testing, 2020, №02



2020 №02 (07)

DOI of Article 10.37434/tdnk2020.02.08

2020 №02 (01)

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Technical Diagnostics and Non-Destructive Testing #2, 2020, pp. 49-57

Investigation of the influence of risk sources on technical safety of welded structures in operation with application of nondestructive testing and technical diagnostics

Yu.K. Bondarenko, O.V. Kovalchuk

E.O. Paton Electric Welding Institute of NASU, 11 Kazymyr Malevych, Kyiv, 03150. E-mail: office@paton.kiev.ua

In keeping with mandatory requirements of technical procedures to technical documents for critical products of welding fabrication, the technical documentation should allow assessment of product compliance with regulatory requirements and should include a description of performance and results of proper analysis and assessment of risk (risks). At present there is no reliable method for assessing the welded structure risk. The paper identifies the features of risk occurrence during the product life cycle. The algorithm of occurrence of components of risk in welded structure operation, which is the aggregate of both the risks connected with deviations of the processes of design, manufacture, and operation (in other words, those connected with the processes of product life cycle), and the risks associated with dangers, which arise from impacts on the structures and the probability of the structure operation outside its application limits. It is noted that the risk in operation is the probability that the structure will reach the limit state during the specified period of operation. The limit states are divided into two groups. The first group includes limit states, the transition through which leads to complete unsuitability of the object. The second group includes those that complicate the normal operation of the object or shorten its service life, compared to the specified term. During operation, the welded metal building structure is exposed, first of all, to mechanical and corrosion impacts. References to the theory and formulas are given that determine the probabilities of a metal structure failure. It is recommended to use the Bayesian formula to calculate the total value of operational risk. 17 Ref., 8 Tabl., 4 Fig.
Keywords: risk, operational risk, risk management, probability of danger occurrence, welded structure, technical safety

Received: 07.10. 2019

References

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