PSI - Issue 22

S.V. Belodedenko et al. / Procedia Structural Integrity 22 (2019) 51–58 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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the series systems will be significantly smaller than RSI of the redundanced systems. Thus, the RSI-method is invariant to systems of different configurations.

Fig.4. Dependences of the initial RSI of the BF shaft casing on the load block parameter col obtained by the elemental calculation by the formulas (8 ) (βEXP), (βLND) and by the calculation of the casing as a monoblocate (LDFΣ). The β PΣLND model, which is recommended for the upper assessment of the systems reliability with a large number of elements, in the risk analysis has an analogue of the Farmer risk aversion curve. A situation arises when an mechanical structural does not perceive risk at the expected level, demonstrating a more optimistic scenario. Conclusions 1 . The RSI-method is suitable for assessing and predicting of the systems safety of various configurations, in particular, large bearing structures of industrial equipment. 2 . In this paper, an attempt was made to solve the problem of multifocal damage by introducing into the block load level c olz , which has the content of the construction fraction, which suffers from over-design deformations. The RSI-method is demonstrated on an example of an evaluation of the technical condition of a blast furnace casing. 3 . Despite the cessation of the 14-year campaign of a blast furnace, the metal in its casing retains a sufficient level of mechanical properties. With an active maintenance strategy, the guaranteed lifetime of the casing can be increased by 3 - 5 times and will be over 25 years. References Fischer, K., Asmolovkiy, N., Custer R., Schubert M., Keil D., Braun B. and Faber, M.H., 2016. New Approaches for Reliability Assessment of Mechanical Systems and Parts. Submitted to ECSSMET. www.researchgate.net/publication/308898708. Mansour, M. M., Hamed, S. M., 2015. A new generalization of power Lindley distribution: with application to lifetime data. Journal of Statistics: Advances in Theory and Applications. 13, 33-65. Belodedenko, S.V., Hanush V.I., and Hrechany, О . M., 2019. Rules for Amalgamating the Reliability of Elements of Powertrain Systems at Maintenance. Journal of Mechanics Engineering and Automation 1(V.9), .24-32. Belodedenko, S.V., Bilichenko, G.N., 2015. Quantitative risk-analysis methods and mechanical systems safety. Metallurgical and mining industry 12, 272-279. Belodedenko, S.V., Chechenev, V.A., 2015. Safety protection of blast-furnace jackets when in operation. Metallurgical and mining industry 11, 127-132. Reinoud van Laar and Edo Engel, 2016. Modern blast furnace design. Millennium steel. 35-40. Chechenev, V.A., 2011. Large-size cooled blast furnace shaft modules. Dnepropetrovsk, pp. 280 (in Russian). Ibragimov, M.S., Shlemko, Y.I., Pelykh, I.V., 2018. Some peculiarities of the blast furnace overhaul under mixed maintenance. Metallurgical and Mining Industry 7, 219-223. (in Russian). https://nmetau.edu.ua/ua/mdiv/i2043/p2441.