Magnetic force excitation bolt joint vibration failure experiment device and test method

A technology of bolt joints and experimental devices, which is applied in vibration testing, measuring devices, testing of machine/structural components, etc., can solve the problems of inability to compare bolted connection structures, control the accuracy of boundary conditions, etc., and achieve the goal of increasing diversity Effect

Pending Publication Date: 2021-06-04
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

In the study of failure modes, most research programs only focus on a single failure mode, but in practical applications, due to the complex and changeable working environment of mechanical equipment, most of the failure modes of bolted joints are multiple failure modes. The result of mutual coupling, not caused by one of the failure modes; In terms of the selection of excitation methods, the excitation methods for the vibration failure reliability test of bolted joints are almost all in the form of contact loading. This contact loading method will not only make the vibra

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  • Magnetic force excitation bolt joint vibration failure experiment device and test method
  • Magnetic force excitation bolt joint vibration failure experiment device and test method
  • Magnetic force excitation bolt joint vibration failure experiment device and test method

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Embodiment Construction

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top / bottom" etc. are based on the orientations shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific

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Abstract

The invention discloses a magnetic force excitation bolt joint vibration failure experiment device and a test method. The experiment device comprises a supporting base, a vibration excitation device, a test device and an acquisition and analysis device. The excitation device can drive a movable magnet to operate by a driving motor and generate periodic magnetic force to act on the bolt to be tested so as to enable the bolt joint to generate vibration failure; a displacement sensor, an acceleration sensor and a strain sensor on the testing device can respectively obtain three response signals of displacement, acceleration and strain of the bolt joint; and the acquisition and analysis device can be used for researching various failure conditions such as thread looseness of the bolt joint, slippage and vibration fatigue of a connected piece and the like by analyzing the obtained response signals. Various kinds of vibration excitation in engineering are effectively simulated through reasonable design, the diversity of experiments is increased by accurately controlling various variables, vibration failure experiment effects of different connection modes are compared, and the method has important value in research on the aspects of bolt joint vibration failure dynamics reliability and the like.

Description

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Claims

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Application Information

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Owner NANCHANG HANGKONG UNIVERSITY
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