Developing an efficient method for reliability analysis of offshore structures by using an improved line sampling method

This paper aims to develop a robust and efficient method for modeling the performance of steel jacket platforms under parameter uncertainties. For this purpose, a combined approach using Linear Simulation (LS) and the improved Grey Wolf Optimization algorithm was developed. First, the performance of the developed model was evaluated on benchmark functions, and then, the probability of failure of the steel jacket structure due to wave loads was calculated. The results showed that the highest probability of platform failure occurred under wave impact with an angle of 315 degrees, a height of 12.2 meters, and a period of 11 seconds, with a probability of 1E-5. This indicates a high level of safety for the designed platform. The results showed that the proposed model has suitable accuracy and can calculate the safety level of various offshore structures with acceptable precision.