Results 231 to 240 of about 4,651,346 (275)

The role of curvatures in damage identification

2022
Natural frequencies are the observed quantities in most of the pioneering works in vibration-based damage identification; they can be reliably measured, but as a global property exhibit a limited sensitivity to local damage, mainly in the early damage state.
vestroni F, pau A, ciambella j
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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 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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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
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A methodology for identification of damage in beams

Inverse Problems in Science and Engineering, 2015
In this work, a parameter based on correlation of signals using mathematical morphology and other two parameters based on energy of a vibration signal using wavelet transform and bispectrum theory are used for approximate location of damage in a steel clamped-free beam.
Nilson Barbieri, Renato Barbieri, Hugo Augusto Tupan Silva   +2 more
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Identification of Sprout Damage in Oats

Cereal Chemistry, 2003
ABSTRACTSprout damage of oats can occur when mature grain is left in the field after maturity and rainfall induces the germination process in the seeds. Although characteristics of sprout damage have been described thoroughly in many grains including wheat, rye, triticale, and barley, such characteristics have not been identified in oats.
Douglas C. Doehlert, Michael S. McMullen
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Identification of Damage in Hysteretic Structures.

1983
Abstract : In structural engineering it is imperative to design each system to survive the inputs anticipated over the design life of the structure. Strong motion inputs cause systems to execute nonlinear responses, and during the strong motion responses, structures accumulate damage. Therefore, the capability to model nonlinear responses and to assess
F. D. Ju, T. L. Paez, M. L. Wang
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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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Identification of Corrosion Damage in Boilers

CORROSION 1984, 1984
It has been said that, from the standpoint of corrosion, a boiler is but a thin film of magnetic iron oxide supported by steel. The preservation of this film is a primary consideration of all water treatment programs, both for operating and idle boilers.
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A Plate with Orthotropic Damages: Dynamics and Damage Identification

43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2002
Usik Lee, Kyoungkeun Cho
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