Results 261 to 270 of about 1,891,292 (305)

Damage identification using chaotic excitation

Smart Structures and Systems, 2013
Vibration-based damage detection methods are popular for structural health monitoring. However, they can only detect fairly large damages. Usually impact pulse, ambient vibrations and sine-wave forces are applied as the excitations. In this paper, we propose the method to use the chaotic excitation to vibrate structures.
Chunfeng Wan, Tadanobu Sato, Zhishen Wu, Jian Zhang   +3 more
openaire   +1 more source

Damage Identification in 1D Structures

47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<BR> 14th AIAA/ASME/AHS Adaptive Structures Conference<BR> 7th, 2006
The paper summarizes experimental and numerical analysis directed towards identification of damages in one-dimensional constructional elements. The presented method of structural damage identification makes use of high frequency signals, which are sensitive to small discontinuities in structures. The experimental set is presented.
Magdalena Palacz, P. Kudela, Marek Krawczuk, Wieslaw Ostachowicz   +3 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +3 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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 ...
openaire   +1 more source

Structural micro-damage identification

41st Structures, Structural Dynamics, and Materials Conference and Exhibit, 2000
Usik Lee, Joonho Chang, Namin Kim
openaire   +1 more source