Calculation method for driving axle gear dynamic characteristics considering main speed reducer housing

Abstract

The invention relates to a calculation method for driving axle gear dynamic characteristics considering a main speed reducer housing. The calculation method comprises the steps of (1) defining an overall coordinate system, (2) building an axis finite element model, (3) building a nonlinear bearing model, (4) building a gear mechanical model, (5) building a dimension reduction finite element model of the main speed reducer housing, (6) building a static model of a driving axle main speed reducer gear transmission system, (7) calculating bearing stiffness formed during static balance, (8) building a dynamic model of the driving axle main speed reducer gear transmission system, (9) calculating natural vibration characteristics of the driving axle main speed reducer gear transmission system, and (10) calculating the driving axle main speed reducer gear dynamic characteristics. According to the calculation method for the driving axle gear dynamic characteristics considering the main speed reducer housing, the gear transmission system dynamic model comprising the main speed reducer housing is built through a finite element method and a modal comprehensive method, the mutual effect of the main speed reducer housing and the transmission system is considered, the driving axle gear dynamic characteristics considering the effect of the main speed reducer housing can be accurately and efficiently calculated, and the calculation method can be widely applied to calculation and analysis of the dynamic characteristics of various gear transmission structures comprising housing bodies.

Description

technical field [0001] The invention relates to a method for calculating the dynamic characteristics of parts in the field of vehicle transmission, in particular to a method for calculating the dynamic characteristics of drive axle gears considering the final reducer casing. Background technique [0002] In the drive axle, the transmission error of the final drive gear is the main excitation source of the vibration and noise of the drive axle system. On the one hand, the transmission error will cause the whistling problem of the gear itself. On the other hand, the dynamic excitation generated by the gear transmission error passes through the transmission shaft, The bearings are transmitted to the shell, and the drive train and the shell interact with each other, causing vibration and noise problems in the entire system. The difficulty in the dynamic analysis of the drive axle final drive gear transmission system lies in how to establish an accurate and complete system dynami...

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Problems solved by technology

[0003] Most of the existing research methods use simplified lumped parameter models when analyzing the dynamics of the drive axle final drive gear transmission system. The system components are treated as lumped masses, and the bearings are treated as springs. , one end is grounded, and the influence of the main reducer shell cannot be considered

Although this method has high computational efficiency, the system model is too simplified to reflect the dimensional characteristics of the drive train components, especially without considering the influence of the final drive housing, which cannot accurately reflect the dynamic characteristics of the system

Another research method directly establishes a solid element finite element model including all parts of the drive axle, and uses the finite element contact calculation method to analyze the dynamic characteristics of the drive axle system. However, the modeling process of this method is very complicated, and the scale of the system model is too large. Large, contact analysis needs to consume a lot of computing resources, and the computing efficiency is low

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