Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

Billie Spencer Jr.

University of Illinois at Urbana-Champaign (US)


Ostatnie publikacje
1.  Błachowski B., An Y., Spencer Jr. B.F., Ou J., Axial strain accelerations approach for damage localization in statically determinate truss structures, Computer-Aided Civil and Infrastructure Engineering, ISSN: 1093-9687, DOI: 10.1111/mice.12258, Vol.32, No.4, pp.304-318, 2017

Streszczenie:
This work proposes an efficient and reliable method for damage localization in truss structures. The damage is localized on the basis of measured acceleration signals of the structure followed by simple statistical signal processing. It has three main advantages over many existing methods. Firstly, it can be directly applied to real engineering structures without the need of identifying modal parameters or solving any global optimization problem. Secondly, the proposed method has higher sensitivity to damage than some other frequently used methods and allows to localize damage as small as a few percents. Thirdly, it is a model-free method, which does not require precise finite element model development or updating. Validation of the method has been conducted on numerical examples and laboratory-scale trusses. Two types of frequently used trusses have been selected for this study, namely Howe and Bailey trusses. The presented experimental validation of the method shows its efficiency and robustness for damage localization in truss structures.

Słowa kluczowe:
structural health monitoring, truss structures, damage detection

Afiliacje autorów:
Błachowski B. - IPPT PAN
An Y. - Dalian University of Technology (CN)
Spencer Jr. B.F. - University of Illinois at Urbana-Champaign (US)
Ou J. - Dalian University of Technology (CN)
45p.

Prace konferencyjne
1.  Błachowski B., An Y., Spencer Jr. B.F., Substructure-level based method for damage quantification in determinant trusses, ISMA 2016 / USD 2016, International Conference on Noise and Vibration Engineering / International Conference on Uncertainty in Structural Dynamics, 2016-09-19/09-21, Leuven (BE), pp.3283-3294, 2016

Streszczenie:
The purpose of this study is to introduce a new method of damage quantification for truss structures. Its advantage is that it can be directly applied to engineering structures without identifying modal parameters or solving a global optimization problem. The damage is localized and quantified based only on measured acceleration signals, distributed across the structure. Moreover, the method is implemented in a decentralized way rather than a centralized one; that is, for quantification of damage in a given substructure, only a small subset of sensors is considered. The method possesses higher sensitivity to damage than other frequently used methods such as Damage Locating Vectors. Validation of the method has been conducted on a numerical example and a laboratory-scale model of a truss bridge, showing its efficiency and robustness.

Słowa kluczowe:
structural health monitoring, damage detection, truss structures

Afiliacje autorów:
Błachowski B. - IPPT PAN
An Y. - Dalian University of Technology (CN)
Spencer Jr. B.F. - University of Illinois at Urbana-Champaign (US)
15p.
2.  Ruiz Sandoval Hernández M.E., Błachowski B., Spencer Jr. B.F., Uso de sensores inalámbricos en la obtención de parámetros modales, XVIII Congreso Nacional de Ingeniería Estructural, 2012-10-31/11-03, Acapulco (MX), pp.1-10, 2012

Streszczenie:
This article presents the implementation of wireless sensors in obtaining modal parameters. The Imote2 platform is used. This is an open platform developed by Intel. The application example is a simply supported wooden plate. It explains how to use the Imote2 sensor and how to extract modal information from the raw data.

Słowa kluczowe:
wireless sensors, modal analysis

Afiliacje autorów:
Ruiz Sandoval Hernández M.E. - inna afiliacja
Błachowski B. - IPPT PAN
Spencer Jr. B.F. - University of Illinois at Urbana-Champaign (US)

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