A Calculation Method for Displacement Adjustment of Ship Shafting Bearings

Abstract

A ship shafting bearing displacement adjustment calculating method belongs to the ship propulsion system technical field; aiming at single construction demand of tail tube rear bearing load adjustment in a real construction field, the invention provides a bearing displacement adjusting optimization method based on Quadratic programming, wherein the method simultaneously take two optimization objectives: minimum tail tube rear bearing load and minimum bearing displacement adjustment amount. Aiming at various bearing load adjusting demands in the real construction field, the minimum absolute value of the difference between bearing displaced load and expected load is taken as the optimization objective; the ship shafting bearing displacement adjustment calculating method is clear in objective, optimization constrained conditions comply with real construction demands, and calculation is simple and easy to realize, thus solving the problems that bearing displacement is difficult to make in shafting adjusting, and improving shafting alignment efficiency.

Description

technical field [0001] The invention relates to a calculation method for adjusting the displacement of a ship shafting bearing, which belongs to the technical field of ship propulsion systems. Background technique [0002] With the increasing size of cargo ships, it becomes more and more difficult to align the propulsion shafting of the ship. Poor alignment of the shafting will lead to high temperature of the bearing, cause the phenomenon of burning tiles, and in severe cases cause the ship to stop operating and bring huge economic losses. At present, it is very difficult for domestic and foreign shipyards to install the shafting system at one time to achieve a reasonable distribution of bearing loads. Usually, it is necessary to adjust the bearing displacement to make the bearing loads meet the requirements of shafting alignment. When formulating the bearing displacement adjustment plan, the general method is to adjust the bearing based on the work experience of the constru...

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Problems solved by technology

[0003] Regarding the formulating method of bearing displacement adjustment in the process of shafting alignment, many scholars often take the minimum load of the stern tube rear bearing as the optimization goal. This optimization method oriented to the minimum load of the stern tube rear bearing does not meet the actual construction needs At the same time, the influence of bearing load on the basis of establishing the optimization algorithm of bearing displacement adjustment did not consider the influence of bearing stiffness, and the bearing of the main engine was not considered as a whole when setting the constraint conditions, which did not conform to the actual construction technology

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