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

Method for measuring fundamental frequency and cable force of cable-stayed bridge cable

A technology of fundamental frequency and cable-stayed bridge cables, which is applied in the field of bridge structures to achieve the effects of reducing difficulty, improving recognition accuracy, and strong operability

Inactive Publication Date: 2016-07-20
XIANGTAN UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a large error in the fundamental frequency value of the cable determined by the frequency difference method

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
  • Method for measuring fundamental frequency and cable force of cable-stayed bridge cable
  • Method for measuring fundamental frequency and cable force of cable-stayed bridge cable
  • Method for measuring fundamental frequency and cable force of cable-stayed bridge cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part 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.

[0025] The measuring method of cable fundamental wave frequency and cable force of the present embodiment cable-stayed bridge comprises the following steps:

[0026] The first step is to perform self-power spectrum analysis on the measured cable vibration signal, and read the frequency value f corresponding to each peak in the spectrum diagram i , f j ,..., f n , arranged in ascending order of frequency values, and make difference between adjacent peaks to get Δf 1 , Δf 2 ,…Δf n ; Then, cal...

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 method for measuring fundamental frequency and cable force of a cable-stayed bridge cable. The method is technologically characterized in that self power spectrum analysis is performed on an actually measured cable vibration signal, thereby reading a frequency value which corresponds with each peak value in a frequency spectrum diaphragm, and obtaining an appropriate functional frequency value fc1 of the cable-stayed bridge cable through a frequency difference method; reading the frequency value which corresponds with the maximal peak value in the frequency spectrum diaphragm, calculating an order number which corresponds with the maximal peak value, and acquiring an approximate fundamental frequency value fc2 again; based on a Zoom-FFT algorithm, performing frequency spectrum fining analysis on a selected frequency band range, defining the frequency value which corresponds with the maximal peak value of the frequency band, namely the fundamental frequency f0; and substituting the fundamental frequency value f0 into a string vibration formula, thereby defining the cable force of the cable-stayed bridge cable. The method of the invention has advantages of improving identification precision on the fundamental frequency of the cable-stayed bridge cable, greatly reducing technical difficulty in accurately identifying the frequency value of the cable-stayed bridge cable and reducing time in data analysis. The method of the invention does not require a complicated judgment and processing process and has high operability.

Description

technical field [0001] The invention belongs to the field of bridge structures, and relates to a method for determining the fundamental wave frequency of a cable-stayed bridge when detecting the cable force of a cable-stayed bridge by a vibration frequency method, in particular to a method for measuring the fundamental wave frequency and the cable force of a cable-stayed bridge. Background technique [0002] Cables are important load-bearing components of cable-stayed bridges, and the magnitude of the cable forces controls the internal force distribution and bridge shape changes of cable-stayed bridges. The measurement of the cable force of the cable-stayed bridge is very important for the cable-stayed bridge in the construction period and in the completed state. [0003] Due to the limitations of on-site measurement conditions and the arrangement of measuring points, when the vibration frequency method is used to measure the cable force of a cable-stayed bridge, it is gener...

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): G01L1/10
CPCG01L1/10
Inventor 龙士国梁宝李婷李印
Owner XIANGTAN UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com