Fiber bragg grating testing method for flow-induced vibration of tube bundle structure

A technology of fiber grating and testing method, which is applied in the testing of machine/structural components, fluid dynamics test, measuring device, etc., can solve the problems of many strain measuring points and complicated test installation procedures, and achieves more measuring points and testing cost. The effect of low and high test accuracy

Pending Publication Date: 2021-09-10
东方电气集团科学技术研究院有限公司
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a fiber grating test method for flow-induced vibration of a tube bundle structure, which can solve the problems of many strain measurement points and cumbersome test installation procedures in the traditional strain test method by using the characteristics of fiber gratings.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fiber bragg grating testing method for flow-induced vibration of tube bundle structure
  • Fiber bragg grating testing method for flow-induced vibration of tube bundle structure
  • Fiber bragg grating testing method for flow-induced vibration of tube bundle structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] like figure 1 As shown, a fiber grating test method for flow-induced vibration of a tube bundle structure, the steps are as follows:

[0027] Step 1. Firstly, according to the structural form and boundary conditions of the tube bundle, determine the location with a higher strain response level of the tube bundle structure. Generally, the fluid inlet and outlet areas and the longer-span tubes have a larger strain response, so it should be selected as the fiber grating layout location, such as figure 2 shown;

[0028] Step 2, according to the selected fiber grating layout position, paste the fiber grating on the outer wall of the test tube in turn, the signal connection line is arranged in the test tube, one end of the signal connection line is drawn from the test tube through the threading hole, connected with the fiber grating, and for encapsulation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a fiber bragg grating testing method for flow-induced vibration of a tube bundle structure. The method comprises the following steps: firstly, reasonably selecting the layout position of a fiber bragg grating in a test, adhering the fiber bragg grating to the outer wall of a test tube, and performing waterproof treatment. The advantages of high anti-interference capability, distributed measurement, small transmission loss and the like of the fiber bragg grating are fully utilized to replace the traditional strain gauge test, the strain measurement of more than ten measuring points can be realized only by one fiber, and the result is not interfered by external temperature; and the method has the advantages of low test cost, simple installation process, high test precision, temperature self-compensation, multiple test points and the like, can provide data input for stress and fatigue life analysis of the tube bundle structure, can easily realize distributed strain measurement of the tube bundle structure in a water environment, can replace a large number of strain gauges, is simple to operate, and low in test cost, can realize distributed accurate measurement of the flow-induced vibration strain of the tube bundle structure with low cost, and has high application and popularization values.

Description

technical field [0001] The invention belongs to the field of flow-induced vibration testing of tube bundle structures, and in particular relates to a fiber grating test method for flow-induced vibration of tube bundle structures. Background technique [0002] The tube bundle structure generally has a large number of tubes, and many strain measurement points are required in the flow-induced vibration test. The traditional measurement method, at most, is to use strain gauges for measurement. However, this traditional measurement method, in addition to the high purchase cost of strain gauges, also has disadvantages such as cumbersome installation and operation of strain gauges, complicated connection relationships, and many and messy connection signal lines. In the installation process, it will also consume a lot of manpower and material resources. [0003] The fiber grating technology is a relatively popular testing technology in the near future. With its strong anti-interfe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00G01H9/00
CPCG01M10/00G01H9/004
Inventor 王立闻刘标彭凡莫堃张沛杨霄徐娜张帆邓超
Owner 东方电气集团科学技术研究院有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap