Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bridge block impact vibration detection method and detection device based on microwave radar device

A microwave radar, shock and vibration technology, applied in vibration testing, shock testing, measurement devices, etc., can solve problems such as low computational efficiency, inaccurate identification of high-order modes, and inability to calculate

Active Publication Date: 2017-01-04
张建
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the convergence of the potential energy to the modal order, the high-order modal identification of the structure is inaccurate
At the same time, because the algorithm is an enumeration method, when there are many cases, the calculation efficiency is low, or even impossible to calculate

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
  • Bridge block impact vibration detection method and detection device based on microwave radar device
  • Bridge block impact vibration detection method and detection device based on microwave radar device
  • Bridge block impact vibration detection method and detection device based on microwave radar device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] as attached figure 1 The structure model of the bridge is shown. The bridge has single-lane traffic in each direction. The entire concrete bridge deck is 6.5m wide and 15.54m long, with sidewalks 1.07m wide on both sides. The distance between three simply supported cold-rolled steel I-beams on the reinforced concrete deck is 2.18m. Microwave radar testing such as figure 1 As shown in Fig. 1, the structural response of the whole structure induced by the impact load is collected by changing the test point of the microwave radar equipment. The specific implementation steps are:

[0124] (1) Determination of substructure division scheme

[0125] According to the site environment and bridge structure form of the tested bridge structure, the bridge structure is divided into 21 monitoring points for monitoring, and all the monitoring points are divided into 2 sub-structures for monitoring. The division scheme is as follows figure 2 shown. Substructure 1 mainly includes d...

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 bridge block impact vibration detection method and a detection device based on a microwave radar device. The detection method comprises following steps of: dividing a bridge into m sub-structures, and setting an impact force input point and a displacement output point on each sub-structure; successively acting impact force on each sub-structure of a bridge block; synchronously adopting a microwave radar device to acquire displacement time-history data of the displacement output node of each sub-structure; solving a frequency response function of each sub-structure; according to the frequency response function of each sub-structure, identifying a modal parameter of each sub-structure; constructing an MAC matrix of each sub-structure and identifying front k stage modal shape direction coefficient of each sub-structure; adopting a self-adaption genetic algorithm, identifying a modal shape direction coefficient of all stages of each sub-structure; and carrying out flexibility matrix calculation and deflection prediction on all structures. According to the invention, a low-cost and highly-efficient vibration test for known input force of a bridge structure can be truly achieved and the detection method and the detection device can be prompted and applied to detection and safety general investigation of a bridge structure.

Description

technical field [0001] The invention relates to the fields of microwave interferometry technology and bridge health monitoring, in particular to a detection method and a detection device for block vibration testing of bridge structures. Background technique [0002] China is currently in a period of rapid development of new-type urbanization and industrialization, infrastructure investment has steadily increased at a rate of about 15%-20% of the gross national product, and a large number of major infrastructures have been completed or are under construction. On the other hand, my country currently has more than 90,000 dangerous bridges. From 2007 to 2012, a total of 37 bridges collapsed across the country, of which 13 bridges under construction had accidents, resulting in 182 deaths and 177 injuries. On average, there are 7.4 "killing bridges" every year, that is to say, there will be an accident in less than two months on average. During the "Eleventh Five-Year Plan" peri...

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
IPC IPC(8): G01M7/02G01M7/08
CPCG01M7/02G01M7/08
Inventor 张建赵文举郭双林李攀杰
Owner 张建
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com