Marine gearbox body structure optimization design method

Abstract

The invention provides a marine gearbox body structure optimization design method which mainly aims at solving the problems that an existing marine gearbox body design still stays in a mode of theoretical calculation, experience analogy, model making, test comparison and then improvement, the mode is inverted at the end, time and labor are wasted, in order to solve the problems that a gearbox structure meeting the requirements can be designed with a great cost and the designed gearbox is not necessarily optimal, the invention provides the marine gearbox body structure optimization design method based on the HyperWorks analysis platform. A plurality of optimization methods are comprehensively utilized, the rigidity of the box body, the inherent frequency, the vibration of a bearing seat and the vibration of machine legs are taken as optimization targets or constraint conditions, and improvement measures are provided for places with poorer performance in the box body structure, such as parts with overlarge local stress, local deformation possibly influencing the transmission precision and overlarge vibration amplitude. Redundant design parts appearing in the box body structure are improved, so that the box body can meet the requirements for vibration and noise reduction and can also meet the requirement for lightweight design.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a method for optimizing the structure design of a marine gear box. Background technique [0002] As the most commonly used mechanical transmission components, gearboxes have been widely used in the fields of automobiles, aviation, aerospace and ships due to their advantages such as high transmission efficiency, compact structure and stable transmission ratio. The gearbox is mainly composed of transmission gear pairs, bearings and boxes. Due to the manufacturing error and installation error of the gear itself, the gears will cause vibration and meshing noise when meshing. The gear shaft transmits the vibration to the box through the bearing, which causes the vibration of the whole gearbox. The vibration of the gearbox is one of the main sources of ship radiation noise, which will directly affect the combat effectiveness of the ship. Therefore, for the marine gearbo...

AI Technical Summary

Problems solved by technology

Some large ships are usually powered by multiple main engines of different forms, which requires the gearbox to have the ability to evenly distribute the power of the main engine to achieve the best utilization of the main engine, and this kind of gearbox usually has a complex structure. In the actual transmission connection , the cabinet often produces distortion due to insufficient rigidity and then induces abnormal vibration. In addition, insufficient rigidity will also cause impact damage during operation.

In this regard, the traditional design method usually stays in the mode of theoretical calculation, empirical analogy, model making, test comparison, and then improvement. The above-mentioned design method puts the cart before the horse, is time-consuming and laborious, and requires a lot of money to design a gearbox that meets the requirements. structure, and the designed gearbox may not be optimal

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