Deep-sea Mining Heave Compensation Simulation Test Platform

The 21st century is "the century of the marine", and it's the century for human to understand, develop and protect the marine. The severe situation that Chinese mineral resources faced need us to develop the technology of deep-sea mineral resources exploitation. In order to ensure the safety of deep-sea mining operations, deep-sea mining heave compensation system is essential equipment. First, the technology of inner and outer heave compensation are introduced , the deep-sea mining technology development is summed up. According to the ocean wave properties of Chinese mining area, the response of deep-sea mining, and the heave compensation system load, a suitable heave compensation system is put forward, a gimbal bearing system is used to compensate pitch and roll movement of the mining vessel, and hydraulic cylinder system is used to compensate the heave movementDeep-sea mining heave compensation system is a large-scale equipment, with heavy load, complex structure, difficulty technology. At the initial stage , it's difficult to test in deep-sea, so to experiment in experimental environment is necessary. Based on similar principles, the suitable similar rule is put forward. By the rule, the heave compensation test system is designed to meet the function need of the test requirements. The test systems includes the vessel movement simulation platform, the pitch and roll movement compensation system, the hydraulic cylinders heave compensation system, and the lifting pipeline simulation system.According to the general movement principles of the rigid body, the kinematic and dynamic analysis of the test system are carried out, and gained the disciplinarian of the six degrees platform. On this basis, the force of the outer ring , the inner ring and the bearing of the gimbal system are analyze. According to the relevant structural design theory, the structure of the outer ring and the inner ring are designed. Using professional finite element analysis software, the finite element analysis of the outer ring and the inner ring are carried out, and the optimization structure of the system are gained.Using the virtual prototype technology, the virtual prototype of the deep-sea mining heave compensation system is designed. In the mechanical system dynamics analysis software ADAMS , a pilot model of the system is built, and the friction, hydrodynamic, as well as dynamic parameters are loaded on the model, then the kinematics and dynamics of the system is reached. The results show that the gimbal system for compensating pitch and roll movement is very good, the rate of compensation up to 98%. At the same time, through simulation analysis, the design parameters of the heave compensation device are provided.At the end of this article, a simple outer ring model similar to the outer ring and its testing device are designed and manufactured. Through compare of the experimental data and finite element analysis data, the finite element analysis method of the fourth chapter is verified.