Sensor placement for structural damage identification by means of topology optimization

The success of virtually all structural health monitoring (SHM) methods depends on the information content of the measurements, and thus on the placement of the available sensors. This paper presents an efficient method for finding optimal sensor distribution over structural system with many degrees...

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Bibliographic Details
Main Authors: Błachowski, Bartłomiej, Ostrowski, Mariusz, Tauzowski, Piotr, Świercz, Andrzej, Jankowski, Łukasz
Format: Conference Proceeding
Language:English
Subjects:
Damage detection
Finite element method
Fisher information
Frame structures
Mathematical analysis
Optimization
Placement
Structural damage
Structural health monitoring
Topology optimization
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Summary:The success of virtually all structural health monitoring (SHM) methods depends on the information content of the measurements, and thus on the placement of the available sensors. This paper presents an efficient method for finding optimal sensor distribution over structural system with many degrees of freedom (DOFs). The objective function is based on the classical Fisher information matrix. Originally, this yields a computationally hard discrete optimization problem. However, the proposed numerical solution method is based on a concept taken from structural topology optimization, where a discrete optimization problem is replaced with a continuous one. Two numerical examples demonstrate the effectiveness of the proposed methodology. These are a 5-bay truss with 24 DOFs and a two-story frame structure whose finite element model has been condensed to 14 DOFs.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0007817