pimiПриборы и методы измеренийDevices and Methods of Measurements2220-95062414-0473BNTU10.21122/2220-9506-2025-16-4-368-378pimi-1004Research ArticleМетоды измерений, контроля, диагностикиMethods of measurements, monitoring, diagnosticsМетод лазерной спекл-корреляции для диагностики колебаний пролётного строения мостаLaser Speckle Correlation Method in Diagnostics of Bridge Span VibrationsГубаревФ. А.GubarevF. A.

Адрес для переписки:Томский политехнический университет,пр-т Ленина, 30, г. Томск 634050,Россия e-mail: gubarevfa@mail.ru

Address for correspondence:Lenin Ave., 30, Tomsk 634050, Russia e-mail: gubarevfa@mail.ru

gubarevfa@mail.ruЕлугачевП. А.ElugachevP. A.

пл. Соляная, 2, г. Томск 634003

Solyanaya sq, 2,Tomsk 634003

БанниковА. А.BannikovА. А.

пл. Соляная, 2,г. Томск 634003

Solyanaya sq, 2, Tomsk 634003,

НурзайВ. А.NurzaiV. A.

ул. Университетская, 33,г. Севастополь 299053

Univesitetskaya str., 33, Sevastopol 299053

МостовщиковА. В.MostovshchikovA. V.

пл. Соляная, 2, Томск 634003

Solyanaya sq, 2, Tomsk 634003

ЛиЛ.LiL.

пр-т Лонгваннан, г. Хулудао 125105

Longwannan Ave., Huludao 125105

Томский политехнический университет, Севастопольский государственный университетРоссияTomsk Polytechnic University, Sevastopol State UniversityRussian FederationТомский государственный архитектурно-строительный университетРоссияTomsk State University of Architecture and BuildingRussian FederationСевастопольский государственный университетРоссияSevastopol State UniversityRussian FederationТомский политехнический университет; Томский государственный архитектурно-строительный университетРоссияTomsk Polytechnic University, Tomsk State University of Architecture and BuildingRussian FederationЛяонинский технический университетКитайLiaoning Technical UniversityChina202524122025164368378Copyright © Губарев Ф.А., Елугачев П.А., Банников А.А., Нурзай В.А., Мостовщиков А.В., Ли Л., 20252025Губарев Ф.А., Елугачев П.А., Банников А.А., Нурзай В.А., Мостовщиков А.В., Ли Л.Gubarev F.A., Elugachev P.A., Bannikov А.А., Nurzai V.A., Mostovshchikov A.V., Li L.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://pimi.bntu.by/jour/article/view/1004

Автомобильные мосты и путепроводы являются важными элементами транспортной инфраструктуры в любой стране. Оперативная диагностика с последующим мониторингом работоспособности критических элементов мостов и путепроводов увеличивает срок их службы. Целью данной работы являлась разработка метода и лазерной установки для дистанционной диагностики колебаний балки, вызванных динамической нагрузкой, и их применение на лабораторной модели моста. В статье рассматривается метод диагностики колебаний пролётного строения моста, основанный на корреляции лазерных спекл-изображений в сочетании со скоростной видеозаписью. С использованием лабораторной модели моста и предложенного метода исследуются несущие конструкции, испытывающие ударную нагрузку. При этом определяются относительные смещения поверхности, вызванные различными условиями нагружения. Программа для расчёта корреляционных функций оптимизирована с учётом характеристик пролётного строения моста. В частности, анализируются смещения поверхности с учётом частоты кадров и размера лазерных спеклов. Методика исследования апробирована на лабораторной модели моста с балками, изготовленными из различных материалов (сталь, бетон, дерево). Для этих балок показаны различные формы и амплитуды смещений, вызванных ударными нагрузками. Эксперименты демонстрируют возможности дистанционного мониторинга вибрации моста при реальных ударных нагрузках, вызванных движением транспортного средства. Полученные данные будут востребованы при использовании предлагаемого метода мониторинга вибрации моста в реальных условиях.

Automobile bridge and overpasses are essential elements of transport infrastructure in every country. Rapid diagnostics and subsequent monitoring of critical bridge and overpass components’ performance increases their service life. The aim of this study was to design a method and laser system for remote diagnostics of beam vibrations caused by dynamic loading and to apply them to a laboratory bridge model. The paper discusses a diagnostic method for bridge span vibrations based on laser-speckle correlation together with high-speed video recording. Using a laboratory model of a bridge, bearing structures under shock loading were studied by means of the proposed method. Relative surface displacements induced by different loading conditions were determined herein. The program for calculating correlation functions was optimized taking into account characteristics of the bridge span. In particular, surface displacements were analyzed with regard to the frame frequency and size of laser speckle patterns. Research technique was tested on the laboratory bridge model with beams made of different materials (steel, concrete, wood). For these beams, various shapes and amplitudes of displacements caused by shock loads are shown. Experiments demonstrate remote monitoring of bridge vibration under real shock loads caused by vehicle movement. This will be useful for further development of the proposed technique for bridge vibrations monitoring in real conditions.

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The authors declare that there are no conflicts of interest present.