Operability of non-ice class aged ships in the Arctic Ocean-part II: Accidental limit state approach

Accidental limit state-based ship collision analysis was undertaken to identify the operability of aged non-ice class ships in the Arctic Ocean. Internal collision mechanics analysis of the struck vessel structures was carried out at a right angle with an initial velocity. The striking ship and struck ship were the same ship, a 157,500 DWT Suezmax class double hull oil tanker. Various Arctic ambient temperature conditions, room temperature to −80 °C, were applied to the ambient exposed plating of the struck ship. Time-variant corrosion wastage was employed in the case of age-related damage. Nonlinear finite element software, LS-DYNA, was conducted to apply the nonlinear constitutive curves of the materials from a series of tensile tests at low temperatures. The operability of aged ships in the Arctic condition was estimated based on the results.