Optimal Design And Simulation Research Of Subsea Flange Connection Tool

Exploration of Deep-water oil and gas is one of the key global energy strategies, and China has begun to pay great attention to the development of automation equipments in offshore oil industry. Aimed at developing the experimental prototype of the Subsea Flange Connection Tool (SFCT) and performing the experiments in 2010, this dissertation carried on the structural design and research of SFCT, preparing theoretical foundation and practical experience for the design and manufacture of engineering system in the future.The current research situation of SFCT, especially the research work of our research group was introduced. The general planning of the prototype and the modular design approach were proposed, and the design assumptions of the prototype were also given. The virtual prototypes of adjusting system of three tool magazines'posture and position were designed, and the interference checking and kinematics simulation were conducted. The kinematics-equivalent mechanism model of the system was established, the feasibility and the kinematic analysis was carried out, ensured the adjustment range of the tool magazines operating position and posture. Through the dynamics calculation, the models and parameters of the dynamic component were determined. The statics analysis and the finite element analysis of adjusting system of three tools'posture and position were conducted, the strength of the key load-bearing parts and the stiffness of the key positioning components were checked. Focus on the phenomenon of stress concentration and the deformation of supporting surfaces, the structure was improved and the dimensions were optimized to achieve the supporting requirements and reliability requirements of the tool magazines. The structural finite element analysis of out-frame was finished. With the prerequisites of satisfying structural strength and locating requirements of inner-frame, weight optimization and structure optimization of out-frame were conducted.The hydrodynamic simulation of SFCT's subsea navigating was conducted. Taking minimal water resistance as the target, the structure and arrangement of the buoyant materials were optimized, which effectively reduces the external load of ROV and ensures the equipment position and posture stability?...