Aluminum plate impact load positioning analysis method based on acoustic mode superposition

A technology of impact load and analysis method, which is applied in the direction of analyzing materials, using sonic/ultrasonic/infrasonic waves for material analysis, and processing the response signals of detection, which can solve problems such as casualties and equipment damage.

Active Publication Date: 2021-04-16
HOHAI UNIV
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Problems solved by technology

If the correct response measures are not taken in the early stage, it will cause damage to the equipment, and may even cause casualties due to improper operation.

Method used

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  • Aluminum plate impact load positioning analysis method based on acoustic mode superposition
  • Aluminum plate impact load positioning analysis method based on acoustic mode superposition
  • Aluminum plate impact load positioning analysis method based on acoustic mode superposition

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Embodiment Construction

[0072] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, and Not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0073] Such as figure 1 As shown, a localization analysis method of impact load of aluminum plate based on acoustic mode superposition, the analysis method includes radiation modal analysis of aluminum plate, establishment of radiation sound field of aluminum plate, measurement of local sound field information and inversion of load shock signal;

[0074] S1: The radiation modal analysis of the aluminum plate takes a rectangular thin plate as the...

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Abstract

The invention provides an aluminum plate impact load positioning analysis method based on acoustic mode superposition. The aluminum plate impact load positioning analysis method comprises the steps of radiation mode analysis of an aluminum plate, establishment of a radiation sound field of the aluminum plate, measurement of local sound field information and inversion of a load impact signal. The radiation modal analysis of the aluminum plate takes a rectangular thin plate as a research object, and the inherent frequency and modal shape function of the aluminum plate can be calculated according to a free vibration differential equation of the thin plate. And according to an acoustic mode superposition method, an external radiation sound field of the aluminum plate can be obtained, and a corresponding relation between the radiation sound field and a load impact signal is established. The microphone array is reasonably arranged on the aluminum plate, so that certain local sound field information can be measured. The inversion of the load impact signal adopts a near-field acoustic holography theory, the information of the whole sound field is inverted from the local sound field information, the position of the load impact is positioned according to the corresponding relation between the radiation sound field and the load impact signal, and the load impact characteristic is inverted.

Description

technical field [0001] The invention relates to a method for positioning and analyzing the impact load of an aluminum plate based on acoustic mode superposition, and belongs to the field of structural health monitoring. Background technique [0002] In structural health monitoring, it is a key step to realize the localization of the impact part to deduce the damaged part. The inverted load shock characteristics provide an important reference for subsequent damage judgment and damage assessment. When using mechanical equipment, various forms of damage may gradually occur to the structure due to the load, which belongs to the damage caused by the impact of the load. If the correct response measures are not taken in the early stage, the equipment will be damaged, and there may even be casualties due to improper operation. Therefore, it is very important to be able to detect the damage caused by the load impact in time, and make an alarm, so as to evaluate the structural damag...

Claims

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Application Information

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IPC IPC(8): G01N29/22G01N29/44
CPCY02T90/00
Inventor 梁栋蔡宇航詹啸强余凯军杨兆宝
Owner HOHAI UNIV
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