A noise reduction and modification optimization method for traction gears of high-speed EMUs

Abstract

An optimization method for noise reduction and modification of traction gears in high-speed EMUs. The maximum modification amount and modification length of the driving wheel are selected as the parameters of tooth profile modification, and the Walker curve is used as the modification curve to construct a parameterized model of gear modification. ;Design the range of modification parameters, use the optimal Latin super-cubic method to sample and obtain multiple sets of modification parameter combinations, and construct a virtual prototype model of modified gear transmission; carry out simulation analysis according to the process of dynamic meshing force-harmonic response-acoustic boundary element, and obtain Multiple sets of data with modification parameters as input and radiation noise as output; the above multiple sets of data are trained and compared through radial basis neural network, and a modification parameter-noise prediction model with stable mapping association is established; noise is minimized as The optimization objective is to solve the optimal gear modification parameter combination with the help of multi-island genetic algorithm. The optimal modification parameter combination obtained by the invention under the minimum radiation noise of the gear transmission system can be effectively applied to the noise reduction modification design of the traction gear of the EMU.

Description

technical field [0001] The invention belongs to the technical field of gear processing, and relates to a method for reducing transmission noise of traction gears of high-speed EMUs through gear modification. Background technique [0002] Noise inside the carriages of high-speed EMUs can reduce passenger comfort. The traction gear transmission system of the EMU is located under the carriage, which becomes one of the main sources of noise in the carriage. Therefore, how to improve the sound radiation characteristics of the traction gear transmission system of high-speed EMUs and control the noise from the source has become an urgent problem to be studied and solved. Tooth profile modification is an effective way to improve the impact of meshing and meshing in the process of gear transmission. However, for the problem of how to determine the modification parameters, it still largely relies on traditional formula method estimation or continuous correction through a large numbe...

AI Technical Summary

Problems solved by technology

If you want to traverse the entire solution space through real experiments or finite element simulation calculations, it will not only cause a huge consumption of resources, but also make it difficult to achieve the goal.

Images