Drive axle dynamic characteristic computing method considering input torque changing

A bridge dynamics and characteristic calculation technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem of not considering the influence of the bearing stiffness by the change of the input torque of the drive axle, and unable to reflect the influence of the change of the input torque.
CN103995940AActive Publication Date: 2014-08-20TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2014-08-20

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Abstract

The invention relates to a drive axle dynamic characteristic computing method considering input torque changing. The method comprises the steps that (1) a drive axle global coordinate system is defined; (2) a shafting beam unit model is established; (3) a nonlinear roller bearing model is established; (4) a gear model is established; (5) a connecting part model is established; (6) a shell finite element model and a dimension-reducing model are established; (7) a complete drive axle system dynamics model is established; (8) bearing stiffness under different input torque working conditions is computed; and (9) the drive axle system dynamic characteristics under different input torque working conditions are computed. According to the method, a finite element method and a modality comprehensive method are used for establishing the complete drive axle system dynamics model which comprises a main speed reducing assembly, a differential mechanism assembly, a hub assembly, a shell and the like, and the dynamic characteristics of a drive axle system can be computed accurately and efficiently.
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Description

technical field

[0001] The invention relates to a method for calculating dynamic characteristics of components in the field of vehicle transmission, in particular to a method for calculating dynamic characteristics of drive axles considering input torque changes. Background technique

[0002] The vibration and noise of the drive axle is the main source of vehicle noise, and the transmission error of the bevel gear of the final drive is the root cause of the vibration and noise of the drive axle. The drive axle is a dynamic system composed of shafts, bearings, gears and housings. The transmission error of the gears will generate dynamic excitations, which will be transmitted to the housing through the shaft-bearings, causing vibration and noise problems in the entire system. Establishing an accurate and efficient dynamic model of drive axle system is an effective method to study the dynamic characteristics of drive axle system, which can greatly shorten the research and devel...

Claims

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