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Research on the classification of life-cycle safety monitoring levels of subsea tunnels

Lu J., Xue X.

Polish Maritime Research

2017

S 2

125--132

As a traffic engineering project across straits or gulfs, subsea tunnel is one of the oceaneering with great construction difficulties, and the key to the success of subsea tunnel engineering lies in timely and accurate assessment of the structure safety of subsea tunnel engineering construction and life-cycle. Xiang’an Xiamen subsea tunnel is China’s first subsea tunnel which crosses complex formation conditions, engineering accidents such as collapse, sudden inflow of water or mud might occur during tunnel construction and operation. Therefore, the concept of subsea tunnel life-cycle monitoring is proposed aiming at the particularity of subsea tunnels. The variation forms of subsea tunnel mainly include large deformation, collapse, primary support cracking, water leakage, water pressure increase, steel arch corrosion, concrete corrosion, longitudinal differential settlement, etc., and classification of the life-cycle safety monitoring levels of the subsea tunnel is conducted based on risk assessment theory and risk level management benchmark to determine the possible variation forms in the monitoring level segments. The research results will provide reference for the subsea tunnel life-cycle monitoring, disaster warning as well as risk management under construction or to be built at home and abroad.

Stoimost' ziznennogo cikla pitatel'nyh nasosov energoblokov moscnost'u 500-1200 MVT

Vasil'ev V.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Nauki Techniczne

2008

Z. 10, Vol. 2

333-341

In the paper the component parts of the life-cycle costs of powerful feed-pumps of electric stations are described. Difference between lump-sum and fixed costs are shown. Current costs cover considerable part in the costs of complete life-cycle and a part of these costs grows constantly.

Application of a modeling and simulation framework for assessing the impact of diagnostics on life-cycle cost and availability

Borgia O., De Carlo F., Tucci M.

Journal of KONBiN

2006

No. 1

5--18

The use of complex technologies, including mechanical and electronic components, doesn’t often permit an early and effective detection of the failures. This tendency underlines the necessity to enrich the probabilistic analysis, based solely on a-priori information, with diagnostic methodologies and systems implementing them, leveraging on a-posteriori knowledge of components’ behavior. The goal of this study is to propose a modeling and simulation framework to operate a technical and an economic comparison between two configurations: with or without diagnostic support.