Dynamic Correction Analysis and Optimization Model of Gear Pair Based on the Normalization of Gear Modification Parameters

In this paper, a method of condition recognition under multi-gear excitation and a method of structural dynamics model modification based on random combination stiffness of large heavy transmission equipment are studied and proposed, and the modified structural dynamics model is applied to the dynamic reliability analysis of gearbox.Firstly, a variable working condition correction method based on working condition characteristics is proposed.The working condition and other commonly used eigenvalue parameters are normalized to the eigenvalue for training.The relationship model between working condition, characteristic value and correction value is established to identify correction value.The effectiveness of the method is verified by the vibration signal of the gearbox.Secondly, the comprehensive meshing stiffness of gear pair is normalized by Fourier series, and the dynamic correction model of gear pair is established.Finally, the method of structural dynamic model modification is applied to gearbox dynamic reliability analysis, and a research method of gearbox dynamic reliability based on structural dynamic model modification is proposed.An improved dynamic model of gearbox structure is used to predict the vibration response of the actual unmeasured points.The dynamic reliability sensitivity analysis and the dynamic reliability analysis based on the first overtaking failure mechanism of the dangerous parts of the transmission are carried out.The three factors which have the greatest influence on the dynamic reliability of the gearbox are calculated.