Structural Reliability Assessment of Corroded Tanker Ship Based on Experimentally Estimated Ultimate Strength

Abstract

This work deals with the reliability assessment of a tanker ship hull structure subjected to a vertical bending moment and corrosion degradation. The progressive collapse and ultimate load carrying capacity are estimated based on experimentally tested scaled box-shaped-specimens. The translation of the strength estimate of the scaled specimen to the real tanker ship hull structure is performed based on the dimensional theory developing a step-wise linear stress-strain relationship. The load-carrying capacity is considered as a stochastic variable, and the uncertainties resulted from the scaled-specimen to the real-structure strength translation, and the subjected load of the real ship are also accounted for. A sensitivity analysis concerning the stochastic variables, included in the ultimate limit state function is performed. The partial safety factors, in the case of a scaled specimen and real structure, are also identified, and conclusions are derived.

Reliability assessment of ship hull girders considering pitting corrosion and crack

“…Guo-qing et al [16] numerically analyzed the ultimate strength of the corroded stiffened panels using the Monte Carlo simulations to define statistical descriptions of the ultimate strength of the corroded stiffened panels. Woloszyk and Garbatov [17] carried out the reliability assessment of the ultimate strength of a tanker ship subjected to corrosion degradation. Zayed et al [18] investigated the reliability of ship structures degraded by corrosion.…”

Risk-Based Integrity Management System of Oil Tanker Hull Structure due to Corrosion

“…Neumann et al, conducted a conditional failure assessment to explain the increased maintenance needed with age, in which a rule-based failure concept is applied along with a linear corrosion degradation model via the levels of corrosion tolerance [5]. While Woloszyk and Garbatov conducted a structural reliability assessment of a real tanker ship on the basis of experimentally estimated ultimate strength [6]. 6 years earlier Zayed et al, have analyzed the reliability of ship hulls subjected to corrosion and maintenance, taking into account the risks associated with the circumstances of loading and the events of inspection [4] [7].…”

Simulation model for analysis and evaluation of selected measures of the helicopter’s readiness

“…The papers are based on human factors concerned, inter alia, studying and comparing the non-technical capabilities used by the pilots during the search and rescue operations and maritime operations, 26 as well as an analysis and an evaluation of mental strain of the pilots. 27 Whereas taking into account the strictly operational (technical) aspects, some authors 28 emphasised the scientific side of the evaluation of the technical condition of an object or its traffic parameters, 29,30 while others concentrated on the analysis and evaluation of the reliability of the system, [31][32][33][34] of the object, 10,13,17,26 its parts, 27,28 its process, 12,35,36 population renewal considering an exchange according to an age, 12,29 and planning the development and improvement of the safety of the objects. [37][38][39] A separate group of studies are the publications related to the optimisation of the location and allocation of the search and rescue boats (SAR) and helicopters 40,41 in order to increase the efficiency of the maritime missions, 42,43 or to process 44 and improve 45 an image.…”