Title:
LATTICE TOWER STRUCTURE DISPLACEMENT RECONSTRUCTION METHOD BASED ON IMPROVED VIBRATION MODE SUPERPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/004534
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of lattice tower structure monitoring. Disclosed is a lattice tower structure displacement reconstruction method based on improved vibration mode superposition. The method comprises: uniformly providing D strain sensors on a lattice tower main material along a height; processing collected strain data {ε}D×1 by using a stochastic subspace identification (SSI) method, so as to obtain a matrix I of first n-order strain vibration modes; calculating, according to a lattice tower design drawing, a function relationship y(x), which is between the distance from a measuring point to a neutral layer and the height; respectively performing polynomial fitting on the first n-order strain vibration modes and the height coordinates x of a lattice tower, so as to obtain a strain vibration mode function Ψi(x), expanding function II according to Taylor's theorem, performing double integration on an expansion result, and substituting a boundary condition to obtain a displacement vibration mode function Φi(x); solving modal coordinates {q}n×1 by means of a least square method; and substituting the height coordinates x of a target point to be subjected to displacement reconstruction, and multiplying a displacement vibration mode function value Φi(x) and the modal coordinates {q}n×1. By means of the improved vibration mode superposition method in the present invention, the number of sensors required is little, a calculation process is simple, and a calculation result is accurate, thereby achieving strong operability and practicability.
More Like This:
Inventors:
FU XING (CN)
ZHANG QING (CN)
REN LIANG (CN)
LI HONGNAN (CN)
ZHANG QING (CN)
REN LIANG (CN)
LI HONGNAN (CN)
Application Number:
PCT/CN2021/108398
Publication Date:
February 02, 2023
Filing Date:
July 26, 2021
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G06F30/13; G06F30/23; G06F119/20
Foreign References:
| CN107103111A | 2017-08-29 | |||
| CN109543258A | 2019-03-29 | |||
| CN107330176A | 2017-11-07 |
Other References:
ZHANG QING; FU XING; REN LIANG; JIA ZIGUANG: "Modal parameters of a transmission tower considering the coupling effects between the tower and lines", ENGINEERING STRUCTURES, ELSEVIER, AMSTERDAM, NL, vol. 220, 29 June 2020 (2020-06-29), AMSTERDAM, NL , XP086225759, ISSN: 0141-0296, DOI: 10.1016/j.engstruct.2020.110947
Download PDF: