Research on gear modification and modal optimization of centralized transmission system based on genetic algorithm
The centralized transmission system has a compact layout and close component spacing,which puts forward higher requirements for its NVH(noise,vibration,harshness)control.Taking the centralized transmission system of an engineering machinery as the research object,firstly,the vibration and noise test was carried out,and the principle of gear micro-modification was analyzed.Secondly,the mutual coupling of system modal resonance and gear meshing was considered,the finite element model of the transmission system was established,and the simulation results showed that the simulation results of gear pair contact patches and modes were consistent with the test results,which verified the feasibility of the modeling method.Then,based on genetic algorithm,the gear micro-modification parameters were solved,the optimal design of the gear micro-modification was realized,and the resonance of the system was avoided by modal optimization.Finally,the experimental verification was carried out,and the results showed that the noise of the transmission system sample was reduced to 95.2 dB after the gear modification,which was 4.8 dB lower than that before modification.The vibration and noise of the transmission system can be reduced by using micro-modification and modal optimization method based on genetic algorithm,which provides a reference for NVH control of the centralized transmission system.
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