Primary Faculty Mentor Name

Eric Hernandez

Status

Graduate

Student College

College of Engineering and Mathematical Sciences

Program/Major

Civil Engineering

Primary Research Category

Engineering & Physical Sciences

Presentation Title

Damage identification on large-scale truss structure using sparse vector recovery

Time

3:00 PM

Location

Silver Maple Ballroom - Engineering & Physical Sciences

Abstract

In recent years, finite element model updating methods which target sparse solutions have been suggested as a means to quantify and locate spatially local damage from highly incomplete modal information. Despite the growing number of sparsity approaches to damage identification, most proposed methods were tested on numerical simulations and experiments comprised of simple model structures. In this paper, the author investigates the application of sparse vector recovery methods on a large-scale and complex aluminum structure strictly using shifts in the identified natural frequencies. Three sparse vector recovery algorithms are considered: l1-norm optimization, non-negative constrained least squares, and a novel approach l0-norm optimization. The algorithms are tested on vibration data taken from a 17.4(m) long three dimensional aluminum highway sign support truss in various damage states.

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Damage identification on large-scale truss structure using sparse vector recovery

In recent years, finite element model updating methods which target sparse solutions have been suggested as a means to quantify and locate spatially local damage from highly incomplete modal information. Despite the growing number of sparsity approaches to damage identification, most proposed methods were tested on numerical simulations and experiments comprised of simple model structures. In this paper, the author investigates the application of sparse vector recovery methods on a large-scale and complex aluminum structure strictly using shifts in the identified natural frequencies. Three sparse vector recovery algorithms are considered: l1-norm optimization, non-negative constrained least squares, and a novel approach l0-norm optimization. The algorithms are tested on vibration data taken from a 17.4(m) long three dimensional aluminum highway sign support truss in various damage states.