Topological optimization design method for low-noise gearbox structure

Abstract

The invention provides a topological optimization design method for a low-noise gear box structure, which belongs to the field of radiation noise and comprises the following steps of: estimating the radiation noise of a gear box; selecting a field point with the maximum radiation noise sound pressure value as an optimization target field point, and performing target area screening based on board optimization of acoustic contribution; gear box structure noise reduction topological optimization calculation; after optimization design is completed, performing radiation noise calculation again, determining the field point with the maximum radiation noise again, and the gearbox structure noise reduction of the field point topology optimizes a design loop iteration criterion. According to the method, screening of areas with large contribution to radiation noise can be achieved through the acoustic contribution amount, noise reduction topological optimization is conducted with the sound pressure of a radiation noise field point as the target, and the purpose of noise reduction is directly and efficiently achieved; the method has a multi-field-point multi-target iterative loop topology optimization capability, so that the radiation noise distribution of the structure is more uniform; and inaccurate screening of an optimized area caused by the existence of a phase difference between ATVand normal vibration speed is avoided.

Description

technical field [0001] The invention belongs to the field of radiation noise, and in particular relates to a topology optimization design method for a low-noise gearbox structure. Background technique [0002] As the most important and most commonly used mechanical equipment for ship power propulsion, ship gear transmission has the advantages of reliable structure and precise transmission, which ensures its indispensable position in the national marine strategy and national economic development. As a parametric self-excited system, the gear pair is used as a parameter self-excited system. With the continuous improvement of the power and performance of the power plant, especially the large-scale high-speed ship gear transmission with a single shaft power of up to 50MW, an input speed of up to 3500r / min, and a pitch circle speed of up to 120m / s With the application of the system, the vibration intensity of its full-load operation exceeds 10mm / s, and the radiated noise generate...

AI Technical Summary

Problems solved by technology

As a parametric self-excited system, the gear pair is used as a parameter self-excited system. With the continuous improvement of the power and performance of the power plant, especially the large-scale high-speed ship gear transmission with a single shaft power of up to 50MW, an input speed of up to 3500r / min, and a pitch circle speed of up to 120m / s With the application of the system, the vibration intensity of its full-load operation exceeds 10mm / s, and the radiation noise generated is as high as 110dB, which seriously affects the service life and performance of the ship's gear transmission, and also reduces the comfort and concealment of the ship itself.

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