Method for obtaining surface contact rigidity based on system characteristic frequency, and detection apparatus thereof

A characteristic frequency and surface contact technology, which is applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, can solve problems such as the difficulty in contact stiffness of the contact pair surface, and achieve the effects of ensuring repeatability, easy positioning, and easy replacement

Inactive Publication Date: 2016-06-15
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a surface contact stiffness detection method that can imitate the actual working conditions of the contact pair, design a corresponding detection device, solve the problem of difficulty in

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  • Method for obtaining surface contact rigidity based on system characteristic frequency, and detection apparatus thereof
  • Method for obtaining surface contact rigidity based on system characteristic frequency, and detection apparatus thereof
  • Method for obtaining surface contact rigidity based on system characteristic frequency, and detection apparatus thereof

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the working principle and the structural drawings.

[0030] Such as figure 1 , the surface contact stiffness detection device of the present invention includes a base (1), an upper elastic mechanism (2), a lower elastic mechanism (3), a contact sample alignment mechanism (not marked in the figure), an initial condition testing mechanism ( Not marked), vibration information collection mechanism (not marked in the figure) and computer (not shown in the figure) and other components.

[0031] The upper single-degree-of-freedom elastic mechanism consists of a T-shaped block (21), a movable support column (22), an upper elastic beam (23), an upper guide groove (231), a sample one (24), a sample one fixed seat (25 ), the upper beam fastening slide (26), etc., wherein the movable support column (22) includes an upper column (223) with an external thread, a lower column (221) and a sleeve (222) ...

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Abstract

The invention provides a detection technology capable of evaluating surface contact under different contact conditions, and specifically relates to a detection method and a detection device for obtaining surface contact stiffness based on the second-order characteristic frequency of the system; two single-degree-of-freedom unit subsystem coupling components are designed Two-degree-of-freedom vibration system, test separately and obtain the stiffness k of two single-degree-of-freedom unit subsystems 1 , ω 01 and k 2 , ω 02 , the contact stiffness value k can be obtained according to the natural modal frequency ω of the two-degree-of-freedom vibration system, which belongs to the non-destructive detection technology method; the adjustable device is designed, the contact pressure of the contact sample can be adjusted, and the parameters of the elastic system can be adjusted. Combine samples with different surfaces for contact stiffness detection; the test device is easy to adjust, easy to locate, and easy to replace, effectively ensuring the repeatability of the experiment.

Description

technical field [0001] The invention relates to a detection technology capable of evaluating surface contact under different contact conditions, in particular to a detection method and a detection device for obtaining surface contact stiffness based on the second-order characteristic frequency of the system. Background technique [0002] In the field of engineering applications, parts are in contact with each other, such as guide rails, manipulators, gear meshing surfaces, combined rotors, etc. The contact conditions directly affect the working reliability, performance, long-term working stability, and carrying capacity of the entire machine. etc., while the contact condition of the part surface is largely related to the evaluation of the actual contact condition of the surface. The macroscopically smooth contact surface is composed of many micro-concave-convex surfaces microscopically. Experiments have shown that the macroscopic part surface contact is actually a part of th...

Claims

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Application Information

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IPC IPC(8): G01N29/12
CPCG01N29/12
Inventor 傅惠南李训登王成勇
Owner GUANGDONG UNIV OF TECH
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