Results 261 to 270 of about 1,886,804 (303)

Damage identification by wavelet analysis

Mechanical Systems and Signal Processing, 2008
Structural health monitoring (SHM) has been related to damage monitoring with operational loads playing a significant role in terms of fatigue life and damage accumulation prognostics. A lot of different techniques like acoustic emission, ultrasonic, acousto-ultrasonic, guided ultrasonic waves or Lamb waves are nowadays investigated in terms of ...
J. Grabowska, M. Palacz, M. Krawczuk
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Identification of Damaging Road Events Using Pseudo Damage Density

SAE International Journal of Passenger Cars - Mechanical Systems, 2020
<div>As a vehicle travels along a road, it experiences a variety of Damaging Events (DEs) in addition to lengthy regions that contribute insignificant damage. Identifying the DEs in a measured road profile would improve the efficiency of vehicle durability analysis and testing.
Craig Altmann, John Ferris
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Damage identification in Euler frames

Computers & Structures, 2012
The present paper examines the effect of local damage in elastic frames composed by Euler beams. The direct problems of undamaged and damaged frames are studied using the Wittrick-Williams algorithm. The related inverse problems of identifying material parameters in the undamaged structure and damage parameters, i.e.
GRECO, Annalisa, Pau A.
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Offshore platform structural damage identification versus robustness

IABSE Workshop, Helsinki 2015: Safety, Robustness and Condition Assessment of Structures, 2015
The assessment of existing offshore steel jacket structures for use beyond their initial life requires a proper design of an inspection plan aimed to constantly check-up the integrity of the structural elements. In most cases the visual inspection of structural members or joints is hard to perform and evermore economically demanding.
BETTI, MICHELE, RIZZO, MICHELE, SPADACCINI, OSTILIO, VIGNOLI, ANDREA   +3 more
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A Damage Identification Procedure for Steel Truss

2020
This paper addresses the problem of identifying structural damage affecting one element of a steel truss. The purpose is to detect damages in relation to their magnitude, location and extension. A planar model of a damaged steel truss is used to illustrate the procedure. The direct problem is addressed by FEM, proposing the local stiffness of a damaged
Crognale M., Gattulli V., Paolone A., Potenza F.   +3 more
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Damage identification in a parabolic arch

2007
A parabolic arch has been studied in its undamaged and damaged states. The damage consists in a notch that reduces the height of the cross section at a given abscissa. A damage identification technique, based on the minimization of an objective function which measures the differences between numerical and experimental variations of natural frequencies ...
A. GRECO, PAU, Annamaria, VESTRONI, Fabrizio   +2 more
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Damage Identification of Existing Structures

1982
In the classical theory of structural reliability as given by Freudenthal (1947), a structure is said to fail whenever the applied force exceeds its corresponding resistance. Although much progress has been made in the theory of structural reliability in recent years [e.g., Freudenthal et al (1975), Shinozuka and Yang (1969), Yang and Shinozuka (1971 ...
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Structural micro-damage identification

41st Structures, Structural Dynamics, and Materials Conference and Exhibit, 2000
Usik Lee, Joonho Chang, Namin Kim
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Damage detection using substructure identification

2013
As civil infrastructure ages, occupants and users are placed at risk. Due to limited funding, agencies are required to push structures past their original design lifetime. This creates an imperative for the civil engineering community to develop robust and accurate methods for monitoring the health of civil structures and ensuring public safety.
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Damage identification on spatial arches

2014
In the paper the dynamic behavior of spatial structures composed by assemblies of circular arches is studied in both undamaged and damaged states. The exact natural frequencies of vibration are evaluated by means of the Wittrick and Williams algorithm once the dynamic stiffness matrix of the entire structure is known.
CALIO', Ivo Domenico, GRECO, Annalisa, D'Urso D.   +2 more
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