Results 41 to 50 of about 7,683,030 (332)

Enhancing the curvature mode shape method for structural damage severity estimation by means of the distributed genetic algorithm

, 2020
An important challenge in damage detection based on the curvature mode shape (CMS) method is recognizing damage severity in damaged structures. Here, an efficient approach is proposed based on the finite element (FE) method, which detects the existence ...
A. Bagherkhani, A. Baghlani
semanticscholar   +1 more source

A Noise-Robust, Baseline-Free, and Adaptive Damage Indicator of Plate-like Structures Based on the Multicomponent Information Separation of High-Resolution Mode Shapes Using Wavelets

Sensors
Modal-based damage identification methods, particularly those utilizing mode shapes, excel in damage localization due to their spatial distribution characteristics.
Yuexin Wang, Tongfa Deng, Jinwen Huang, Maosen Cao, Dragoslav Sumarac   +4 more
doaj   +1 more source

A Review on Vibration-Based Damage Detection Methods for Civil Structures

Vibration, 2023
Vibration-based damage detection is a range of methods that utilizes the dynamic response of a structure to evaluate its condition and detect damage.
Xutao Sun, Sinniah Ilanko, Yusuke Mochida, Rachael C. Tighe   +3 more
doaj   +1 more source

Stress effects in structure formation [PDF]

, 1999
Residual velocity dispersion in cold dark matter induces stresses which lead to effects that are absent in the idealized dust model. A previous Newtonian analysis showed how this approach can provide a theoretical foundation for the phenomenological ...
A.D. Challinor, A.D. Challinor, D.R. Matravers, David R. Matravers, G.F.R. Ellis, G.F.R. Ellis, J. Bardeen, J. Binney, J. Ehlers, J. Ehlers, J.D. Barrow, J.D. Barrow, Josep Triginer, M. Bruni, M.S. Longair, R. Maartens, R. Maartens, R. Maartens, R. Maartens, R. Maartens, R. Maartens, Roy Maartens, S.N. Gurbatov, T. Buchert, T. Padmanabhan, W. Hu, W. Israel   +26 more
core   +2 more sources

Mode shape curvature of multiple cracked beam and its use for crack identification in beam-like structures

, 2020
The problem of using the modal curvature for crack detection is discussed in this paper based on an exact expression of mode shape and its curvature. Using the obtained herein exact expression for the mode shape and its curvature, it is demonstrated that
N. T. Khiem
semanticscholar   +1 more source

Shape-preserving diffusion of a high-order mode

, 2012
The close relation between the processes of paraxial diffraction and coherent diffusion is reflected in the similarity between their shape-preserving solutions, notably the Gaussian modes.
Dimitry Yankelev, Firstenberg, Firstenberg, Firstenberg, Higginbottom, MacAdam, Moshe Shuker, Nir Davidson, Ofer Firstenberg, Porras, Pratesi, Pugatch, Saghafi, Shin, Shuker, Siegman, Takenaka, Yoshikawa, Zauderer   +18 more
core   +1 more source

Numerical calculations of diffraction losses in advanced interferometric gravitational wave detectors [PDF]

, 2007
Knowledge of the diffraction losses in higher-order modes of large optical cavities is essential for predicting three-mode parametric photon-phonon scattering, which can lead to mechanical instabilities in long-baseline gravitational wave detectors.
Barriga, Pablo, Bhawal, Biplab, Blair, David G., Ju, Li   +3 more
core   +1 more source

Damage Identification of Structures Using Second-Order Approximation of Neumann Series Expansion [PDF]

Journal of Rehabilitation in Civil Engineering, 2020
In this paper, a new method proposed for structural damage detection from limited number of sensors using extreme learning machine (ELM). One of the main challenges in structural damage identification problems is the limitation in the number of used ...
Seyed Sina Kourehli
doaj   +1 more source

Shape mode analysis exposes movement patterns in biology: flagella and flatworms as case studies

, 2014
We illustrate shape mode analysis as a simple, yet powerful technique to concisely describe complex biological shapes and their dynamics. We characterize undulatory bending waves of beating flagella and reconstruct a limit cycle of flagellar oscillations,
Friedrich, Benjamin M., Riedel-Kruse, Ingmar H., Rink, Jochen C., Werner, Steffen   +3 more
core   +3 more sources

The Effect of Fiber Orientation and Crack on Dynamic Characteristics of a Unidirectional Composite Cantilevered Wing Plate

International Journal of Technology
Composite materials are becoming key elements in constructing advanced structures such as aircraft. These structures offer the benefit in terms of optimization between strength, stiffness, and weight.
Faisal Ramadhan, Rianto Adhy Sasongko, Leonardo Gunawan, Mahesa Akbar, Djarot Widagdo   +4 more
doaj   +1 more source