Singular spectrum analysis based structural damage identification in beams with multiple breathing cracks DOI
J. Prawin

Mechanics Based Design of Structures and Machines, Journal Year: 2023, Volume and Issue: 52(6), P. 3011 - 3037

Published: April 11, 2023

This paper presents a generalized vibration-based multiple breathing crack localization technique in beams with an unknown number of cracks based on Singular Spectrum Analysis (SSA). Localization is highly challenging inverse problem, as all these (more than two) might be similar state (either opening or closing state) at any particular time instant contrasting states (while some are opening, others during vibration. The level nonlinearity vibration response strongly dependent not only each size, and location but also the application driving force along cracked beam. concept varied input frequency excitation sources employed present work for identification over tedious traditional approach varying positions. major advantage using singular spectrum analysis that it can reliably isolate extract very low-amplitude nonlinear sensitive components (super harmonics intermodulation) being buried total pairwise eigenvalue property harmonic components. Investigations have been carried out by number, spatial locations, intensities cracks. Sensitivities associated measurement noise limited sensors investigated. results both numerical experimental investigations this concluded proposed SSA effectively localize closely spaced sparsely (i.e.,, spatially far apart) data-driven, works sensors, does need reference healthy measurements.

Language: Английский

Natural frequencies of submerged microplate structures, coupled to stationary fluid, using modified strain gradient theory DOI
Korosh Khorshidi, Babak Soltannia‬, Mahdi Karimi

et al.

Composite Structures, Journal Year: 2023, Volume and Issue: 326, P. 117583 - 117583

Published: Oct. 4, 2023

Language: Английский

Citations

4
Mechanical and deformation properties of eco-bag reinforced soil retaining walls under the synergistic effect of roots and geogrids DOI
Wenchao Ma, Yunyan Zhou

Bulletin of Engineering Geology and the Environment, Journal Year: 2024, Volume and Issue: 83(6)

Published: May 4, 2024

Language: Английский

Citations

1
Mathematical Models for Ultrasound Elastography: Recent Advances to Improve Accuracy and Clinical Utility DOI Creative Commons
Ali Farajpour, Wendy V. Ingman

Bioengineering, Journal Year: 2024, Volume and Issue: 11(10), P. 991 - 991

Published: Sept. 30, 2024

Changes in biomechanical properties such as elasticity modulus, viscosity, and poroelastic features are linked to the health status of biological tissues. Ultrasound elastography is a non-invasive imaging tool that quantitatively maps these characteristics for diagnostic treatment monitoring purposes. Mathematical models essential ultrasound they convert raw data obtained from tissue displacement caused by waves into images observed clinicians. This article reviews available mathematical frameworks continuum mechanics extracting tissues elastography. Continuum-mechanics-based approaches classical viscoelasticity, elasticity, poroelasticity models, well nonlocal continuum-based described. The accuracy can be increased with recent advancements modelling techniques including hyperelasticity, biphasic theory, inversion-based incorporating scale effects. However, time taken clinical increases more complex this major challenge expanding utility As we strive provide most accurate patients, further research needed refine incorporation workflow.

Language: Английский

Citations

1
Size-dependent analysis of porous multi-directional FG shell structures based on the modified couple stress theory using the unsymmetric finite element method DOI
Songhao Wang, Yan Shang, Zhenghua Qian

et al.

Acta Mechanica, Journal Year: 2022, Volume and Issue: 233(12), P. 5105 - 5136

Published: Oct. 19, 2022

Language: Английский

Citations

6
Singular spectrum analysis based structural damage identification in beams with multiple breathing cracks DOI
J. Prawin

Mechanics Based Design of Structures and Machines, Journal Year: 2023, Volume and Issue: 52(6), P. 3011 - 3037

Published: April 11, 2023

This paper presents a generalized vibration-based multiple breathing crack localization technique in beams with an unknown number of cracks based on Singular Spectrum Analysis (SSA). Localization is highly challenging inverse problem, as all these (more than two) might be similar state (either opening or closing state) at any particular time instant contrasting states (while some are opening, others during vibration. The level nonlinearity vibration response strongly dependent not only each size, and location but also the application driving force along cracked beam. concept varied input frequency excitation sources employed present work for identification over tedious traditional approach varying positions. major advantage using singular spectrum analysis that it can reliably isolate extract very low-amplitude nonlinear sensitive components (super harmonics intermodulation) being buried total pairwise eigenvalue property harmonic components. Investigations have been carried out by number, spatial locations, intensities cracks. Sensitivities associated measurement noise limited sensors investigated. results both numerical experimental investigations this concluded proposed SSA effectively localize closely spaced sparsely (i.e.,, spatially far apart) data-driven, works sensors, does need reference healthy measurements.

Language: Английский

Citations

3