Calculation Of Lubricative Characteristics Of Marine Stern Tube Bearing With Propeller Hydro-oscillation Force

With the development of the Transportation, running benefit and safety all put forward higher requirement about the dependability of ships. The stern tube instrument, pivotal parts of ships, can not follow the traditional structure type and the routine static design technique any more. It has become the hotspot of the shipping industry in the world.The marine stern tube bearing is a special structure and complicated load sliding bearing, which is always under foul lubricative state in real work, and always produces bad abrasion to get premature invalidation. This brings a great influence to ship' s safely sailing and economic benefit. So, to ameliorate its capability, we must betterment the traditional design technique and put forward a effective dynamic design technique to increase its work life and stay in best work status.This thesis tried to connect the dynamic factor of the propeller hydro-oscillation force and the lubricative state of it to analyze and calculate the lubricative characteristics of it with many variables, and them to explore a feasible way for the lubricative characteristics calculation of it, reckoning the propeller hydro-oscillation force in and put up a flat roof for reckoning all dynamic factor in future.Concretely, the main contents are obtained in this paper as follows:1. It constructed the math model of the ship shafting transverse vibration and the lubricative capability calculation of stern tube bearing. This was the theory gist of the thesis to calculate it, reckoning the propeller hydro-oscillation force. By the research on them, it made the theory basis for the opening of the system software.2. By transfer matrix technique, it studied the shafting transverse vibration model, whose fountain is hydro-oscillation force, and sought the respond characteristics of stern tube bearing.3. By modifying Reynolds equation properly and applying hydro-dynamic lubricative theory and finite element theory, it sought the answer of the math model and studied the press' s variety of stern tube bearing under every rank respond, and more about the oil film stiffness and damp coefficient, and at last put some discusses about the dynamic design technique of stern tube bearing.4. Introduced the opening and using of the stern tube system software.5. Calculated the given data to validate the correction of the model and available of software, and analyzed the results.6. Took the friction and wearing trial to validate the correcting of results of water-lubricated bearing lubricative characteristic.