4. Study on the Risk-Based Methodology for Ship Structural Design
4. Study on the Risk-Based Methodology for Ship Structural Design
4. Study on the Risk-Based Methodology for Ship Structural Design
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2. Safety Level of LSM• Calculati<strong>on</strong> of <strong>Design</strong> Safety Level‣ Direct Load Analysis• is c<strong>on</strong>sidered as more reas<strong>on</strong>able than simplified <strong>for</strong>mulas that are based<strong>on</strong> plenty of assumpti<strong>on</strong> and idealizati<strong>on</strong>• is essential to probabilistic modeling of dynamic loads‣ Probability of failure can be produced by using• SRA (<strong>Structural</strong> Reliability Analysis), established well at present‣ <strong>Design</strong> safety level• For estimating DSL, HPP (Homogeneous Poiss<strong>on</strong> Process) was used• to model occurrences of a specific event within a given time period• Assumpti<strong>on</strong>s<strong>Ship</strong> experiences a wave repeatedly & independently during its lifetimeEvent: occurrence of structural failure while ship goes through a waveDSL equivalent to no occurrence of <strong>the</strong> event throughout ship’s lifetimeThe 6 th ASEF- 12 -
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