Reliability-Based Design For Pressure Shell Of Submarine Pipeline Inspection Auv With 1,500 Meters Depth

Along with the fast development of the ocean exploitation, the cost-effective requirement of autonomous underwater vehicle (AUV), which can perform more complicated missions such as the oil exploitation and the inspection of the submarine pipeline is more urgent. The shell types of submarine pipeline inspection AUV are divided into pressure shell and permeable shell, and ring-stiffened cylinder is one of the most important structure types in pressure shell. In pressure shell optimization design problem, both discrete and continuous variables are involved and uncertainties are ubiquitous in any stage of the AUV development. In this paper, reliability-based design (RBD) with mixed discrete and continuous random variables is proposed to handle the pressure shell design. The effectiveness of the proposed method for pressure shell design is validated by energy module pressure shell of submarine pipeline inspection AUV with 1500 maters depth.