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Dynamic stiffness modeling method for flexible support gear transmission device

A technology of gear transmission and flexible support, applied in the fields of instrumentation, calculation, electrical and digital data processing, etc., can solve the problem of difficulty in direct expansion, and achieve the effect of reducing the calculation scale, strengthening the applicability, and improving the accuracy

Active Publication Date: 2019-11-08
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

In the vibration analysis of the gear system, the foundation usually only obtains the dynamic stiffness parameters, so it is difficult to directly extend the gearbox coupling analysis model to the gear-casing-foundation coupling model. Only the mechanical dynamic stiffness synthesis method can be applied to the gear considering the foundation coupling. Potential for System Vibration Analysis

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  • Dynamic stiffness modeling method for flexible support gear transmission device
  • Dynamic stiffness modeling method for flexible support gear transmission device
  • Dynamic stiffness modeling method for flexible support gear transmission device

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Embodiment 1

[0037] This embodiment provides a dynamic stiffness modeling method for a flexible support gear transmission. For a single-layer vibration-isolated gear system, the system is divided into a transmission system module, a box module, a vibration isolator module and a basic module, such as figure 1 As shown, it specifically includes the following steps:

[0038] Step 1, establish the lumped mass model of the transmission system module, and convert to obtain the dynamic stiffness equation of the transmission system module;

[0039] Step 2, establish the finite element model of the box body module, and obtain the dynamic stiffness equation of the box body module through harmonic response analysis;

[0040] Step 3. Simplify the vibration isolator module into a Timoshenko beam, and obtain the dynamic stiffness equation of the vibration isolator module through the wave equation;

[0041] Step 4, the basic module obtains dynamic stiffness parameters through tests;

[0042] Step 5. By...

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Abstract

The invention provides a dynamic stiffness modeling method for a flexible support gear transmission device, belongs to the field of gear system dynamic modeling, and aims to divide a common single-layer vibration isolation gear system into a transmission system, a box body, a vibration isolator and a basic module. The method comprises the steps of establishing a concentrated mass model of the transmission system, and converting to obtain a dynamic stiffness equation; establishing a box body finite element model, and obtaining box body dynamic stiffness parameters through harmonic response analysis; simplifying the vibration isolator into a Timoshenko beam, and obtaining a dynamic stiffness equation through a wave equation; obtaining dynamic stiffness parameters by a foundation through a test; by assembling the dynamic stiffness equations of the subsystems, obtaining a complete dynamic stiffness model of the gear transmission device, and hybrid modeling of theoretical parameters / test parameters can be achieved. The modeling method can greatly improve the modeling efficiency of gear transmission device analysis and the accuracy of calculation results.

Description

technical field [0001] The invention belongs to the field of dynamic modeling of a gear system, and in particular relates to a dynamic stiffness modeling method of a flexible support gear transmission device. Background technique [0002] At present, the gear system dynamic model is mainly based on the gear-rotor coupling model, and the modeling method is mainly the lumped mass method. When analyzing the vibration and noise of the box, the conventional method is to establish a finite element model of the box and take into account the bearing excitation force of the uncoupled transmission system model, without considering the interaction between the gear pair, shaft, bearing, foundation, and gearbox. [0003] Some scholars have established the coupled dynamic model of the gear transmission system and the box, using methods such as lumped mass method, finite element method, multi-body dynamics, modal synthesis method, dynamic stiffness synthesis method and statistical energy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王海伟刘更刘岚任亚峰吴立言包雪亮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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