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A method to verify the vibration coupling characteristics of two-stage fixed shaft gear transmission system

A technology of gear transmission and fixed shaft, which is applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., can solve the problem of unclear vibration coupling mechanism of two-stage fixed shaft gear transmission system, and solve the problem of unknown vibration coupling mechanism Effect

Active Publication Date: 2019-07-16
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for verifying the vibration coupling characteristics of a two-stage fixed-axis gear transmission system. The method is based on a lumped parameter model to simulate and calculate the vibration response of a two-stage fixed-axis gear , which solves the problem that the vibration coupling mechanism of the two-stage fixed-axis gear transmission system is unclear, provides a new idea for the vibration decoupling of the two-stage fixed-axis gear transmission system, and can be extended to multi-stage gear transmission systems

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  • A method to verify the vibration coupling characteristics of two-stage fixed shaft gear transmission system
  • A method to verify the vibration coupling characteristics of two-stage fixed shaft gear transmission system
  • A method to verify the vibration coupling characteristics of two-stage fixed shaft gear transmission system

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Embodiment

[0037] This embodiment provides a method for verifying the vibration coupling characteristics of a two-stage fixed shaft gear transmission system. The flow chart of the method is as follows figure 1 As shown, the modeling diagram of the two-stage fixed-axis gear transmission system is shown in figure 2 As shown, the method includes the following steps:

[0038] S1. According to the actual two-stage fixed-axis gear transmission system, consider the torsional stiffness and bending stiffness of the connecting shaft between the two-stage fixed-axis gears, and establish a corresponding lumped parameter model, where the length of the middle connecting shaft of the two-stage fixed-axis gears is 160mm, diameter 48mm is the reference axis, called axis a; the relevant parameters of the two-stage fixed axis gear transmission system are shown in Table 1:

[0039]

[0040] Table 1

[0041] Establish the coordinate system of the two-stage fixed-axis gear transmission system, analyze t...

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Abstract

The invention discloses a method for verifying vibration coupling characteristics of a two-stage fixed-axis gear transmission system. The method comprises: S1, establishing a corresponding concentrated parameter model according to an actual two-stage fixed-axis gear transmission system, listing dynamic differential equations of the system, obtaining a mass matrix M, a stiffness matrix K and a damping matrix C; S2, determining an operating condition of the system, including the input speed n, the driving torque Tinput, the load Toutput and the error excitation e, and obtaining the torque matrixT and the error excitation matrix E; S3 calculating the mass, stiffness and damping of each part of the concentrated parameter model in the system; S4, using the average meshing stiffness kma to analyze the inherent characteristics of the system through the complex modal method, and obtaining the natural frequencies and corresponding vibration modes of each order of the system; S5, using the Runge-Kutta method to solve the dynamic differential equations of the system, and obtaining the dynamic response of the system; and S6, using a first-order meshing frequency amplitude ratio of different levels under the same degree of freedom as an evaluation index to analyze the two-stage vibration coupling of the system.

Description

technical field [0001] The invention relates to the field of gearbox vibration research and is used for verifying the vibration coupling phenomenon of two-stage fixed-axis gears, in particular to a method for verifying the vibration coupling characteristics of a two-stage fixed-axis gear transmission system based on a concentrated parameter model. Background technique [0002] Multi-stage gear transmission systems are widely used in industry. When the vibration signal of the two-stage fixed-axis gear transmission system is collected in the actual test, there is a coupling phenomenon between the vibration signals of the gear transmission system, that is, the second-stage meshing frequency and its high-order multiple exist in the vibration signal collected by the first stage. Similarly, the vibration signal collected by the second stage contains the first-stage meshing frequency and its high-order multiplier signal. At present, the research on the coupling mechanism of the vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/021G01M13/028
CPCG01M13/021G01M13/028
Inventor 钟伟楠丁康何国林杨小青
Owner SOUTH CHINA UNIV OF TECH
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