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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1. Safety Level <strong>Based</strong> Assessment• Step 1. <strong>Design</strong> Scope‣ To select initial scantling and c<strong>on</strong>cerned failure mode• Dimensi<strong>on</strong>, locati<strong>on</strong>, material, corrosi<strong>on</strong>, c<strong>on</strong>figurati<strong>on</strong>, etc.• Yielding, buckling, fatigue, impact, etc.• Step 2. Target Safety Level‣ Safety goal, i.e. <strong>the</strong> smallest allowable level securing safety‣ C<strong>on</strong>sidering member type, failure mode and damage c<strong>on</strong>sequence• Step 3-1. Limit State Equati<strong>on</strong>‣ <strong>Design</strong> criteria: Z = R – L (R & L: resistance & load factor)‣ Z = 0 : boundary between safe and fail‣ Probability of failure is <strong>the</strong> likelihood that Z < 0 occursThe 6 th ASEF- 6 -
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