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Detection method of joint state of explosive composite pipe based on vibration response information

A vibration response, combined state technology, applied in measurement devices, special data processing applications, instruments, etc., can solve the problems of large detection error, low detection efficiency, and high detection cost, and achieve the effect of low cost and strong real-time performance.

Active Publication Date: 2019-07-12
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the bonding state of explosive composite pipes based on vibration response information, which solves the problems of high detection cost, low detection efficiency, large detection error and inability to realize online detection in existing detection methods

Method used

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  • Detection method of joint state of explosive composite pipe based on vibration response information
  • Detection method of joint state of explosive composite pipe based on vibration response information
  • Detection method of joint state of explosive composite pipe based on vibration response information

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Embodiment Construction

[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] refer to figure 1 As shown, it is the flow chart of the combined state detection of the explosive composite pipe of the present invention. By applying pulse excitation, the free attenuation vibration response information of the structure is obtained; the adaptive dual-tree complex wavelet basis function is constructed based on the characteristics of the vibration signal, and used for the model of the vibration response signal The state features are separated, and then the time entropy index of the single-mode signal in each frequency band is extracted to form the original feature set; the time entropy index of the most sensitive frequency band is selected from the original feature set based on the distance evaluation technology as the detection index. Based on the change of the detection index, the state of the detection pipeline is de...

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Abstract

The invention discloses an explosive compound pipe combining state detection method based on vibration response information. The explosive compound pipe combining state detection method comprises: applying excitation to an explosive compound pipe through a pulse exciter, and collecting the free decaying vibration response signal of the compound pipe; based on the characteristic of the vibration response signal, constructing a self-adapting dual-tree complex wavelet based function, and using the function in the modal character separation of the vibration response signal; extracting the time entropy indices of each order modal signal to form an original character set; based on a distance evaluation technology, selecting the time entropy index of the most sensitive frequency band from the original character set as the detection index; and finally based on the detection index change, determining the explosive compound pipe combining state. According to the present invention, the vibration response information is used to detect the pipe combining state, the method has characteristics of simpleness, reliability, easy performing, low cost, strong real-time property and the like, and is suitable for the real-time detection of the pipeline condition, the on-line nondestructive detection of the explosive compound pipe combining state is achieved, and the important engineering practical value is provided.

Description

technical field [0001] The invention relates to a method for detecting the health state of a mechanical structure, in particular to a method for detecting the joint state of an explosive composite pipe based on vibration response information. Background technique [0002] The explosive composite pipe uses the huge energy and shock waves generated by the explosion of explosives to make the liner and the base pipe collide at high speed, and uses the relative deformation of the liner and the base pipe to make them bond with each other, and there is no metallurgical bonding interface between the liner and the base pipe , the combination of the liner and the base pipe is mainly maintained by the radial residual stress between the base pipe and the liner. Therefore, the quality of the bonding state of the composite pipe directly affects its application in engineering. The bonding state of the explosive composite pipe is not good, and defects such as wrinkles, bulges, separation, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04G06F17/50
CPCG01N19/04G06F30/17G06F2113/14
Inventor 魏帆张燕飞郭霖吴泽思悦张周锁袁飞晨王永芳
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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