Reliability Analysis and Updating of Inspected Ship Structures subject to Spatially Variable Corrosion

We address the effect of spatial variability of corrosion on the reliability of ship structures conditional on inspection results. We apply a hierarchical spatial model to model the spatial variability of corrosion. To tackle the high-dimensional reliability and Bayesian updating problem, which arises from the spatial corrosion model, computations are performed by the BUS approach in combination with subset simulation. To reduce computation time in the evaluation of the time-dependent reliability, we propose to perform subset simulation in reverse chronological order. A series of numerical investigations is performed to investigate the effect of different spatial corrosion models, as well as the inspection coverage, on the resulting reliability.     «

We address the effect of spatial variability of corrosion on the reliability of ship structures conditional on inspection results. We apply a hierarchical spatial model to model the spatial variability of corrosion. To tackle the high-dimensional reliability and Bayesian updating problem, which arises from the spatial corrosion model, computations are performed by the BUS approach in combination with subset simulation. To reduce computation time in the evaluation of the time-dependent reli...     »