Results 241 to 250 of about 4,075,278 (310)

Modal analysis identification techniques

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2001
Summary: The objective is to give a general panorama of modal analysis identification techniques, as a detailed explanation is not possible due to the vast amount of available information concerning the many existing methods. Beginning with an introduction, followed by the various types of classification and a short historical note, the reader is led ...
Maia, N. M. M., Montalvão e Silva, J. M.   +1 more
openaire   +1 more source

Modal Identification of High-Speed Railway Bridges through Free-Vibration Detection

, 2020
In the dynamic characteristic analysis of high-speed railway bridges, free-vibration responses after a train passes are valuable for modal identification.
Yang Xiaomei, T. Yi, Qu Chunxu, Hongnan Li, Hua Liu   +4 more
semanticscholar   +1 more source

Modal parameter identification using simulated evolution

AIAA Journal, 1997
A global optimization algorithm based on the Darwinian evolutionary theory is implemented for the identification of modal parameters of linear vibrating structures. The capability of the evolutionary search method in locating the global minimum among numerous local minima is demonstrated.
Chiang, Dar-Yun, Huang, Si-Tsong
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Modal Parameter Identification of Controlled Structures

Journal of Guidance, Control, and Dynamics, 1997
A simple procedure to extract the modal parameters of the closed-loop structural system is proposed. It is formulated by using the extended Kalman filter (EKF) technique. The unknown parameters are eigenfrequencies, damping ratios, mode shapes, and modal masses.
Kasai, Tokio, Komatsu, Keiji, Sano, Masa
openaire   +2 more sources

Structural modal identification through ensemble empirical modal decomposition

Smart Structures and Systems, 2013
Identifying structural modal parameters, especially those modes within high frequency range, from ambient data is still a challenging problem due to various kinds of uncertainty involved in vibration measurements. A procedure applying an ensemble empirical mode decomposition (EEMD) method is proposed for accurate and robust structural modal ...
J. Zhang, R.Q. Yan, C.Q. Yang
openaire   +1 more source

Thermoelasticity-based modal damage identification

International Journal of Fatigue, 2020
Abstract The response of linear dynamic structures can be decomposed into modal components, where each natural frequency is also represented by a corresponding mode shape and damping ratio. While vibration-fatigue-damage identification was recently expanded using modal decomposition, this research proposes a modal-decomposition-based thermoelastic ...
Capponi L., Slavic J., Rossi G., Boltezar M.   +3 more
openaire   +1 more source

Clustering Number Determination for Sparse Component Analysis during Output-Only Modal Identification

Journal of engineering mechanics, 2019
Output-only modal identification plays an important role in the structural health monitoring of large-scale structures.
T. Yi, Yao Xiaojun, Qu Chunxu, Hongnan Li   +3 more
semanticscholar   +1 more source

Instantaneous modal identification under varying structural characteristics: A decentralized algorithm

, 2020
One of the latest trends in structural health monitoring involves the use of wireless decentralized sensing systems, developed to reduce costs and speed up the whole monitoring process.
Said Quqa, L. Landi, P. Diotallevi
semanticscholar   +1 more source

Parametric analysis of SSI algorithm in modal identification of high arch dams

, 2020
The covariance-driven stochastic subspace identification (SSI–COV) is widely used in the operational modal analysis of structures. However, the appropriate selection of user-defined parameters in the SSI–COV algorithm remains a challenging issue ...
Shuai Li, Jin‐Ting Wang, Ai-Yun Jin, G. Luo   +3 more
semanticscholar   +1 more source

Comparison of two dissimilar modal identification techniques

Journal of Guidance, Control, and Dynamics, 1992
Recent laboratory results using a refined phase resonance method and the eigensystem realization algorithm on the same test structure are reported. These methods are dissimilar modal identification techniques suitable for future large spacecraft. The theory, application approach, and results obtained for each technique are summarized and compared ...
Pappa, R.S. (1), Schenk, A., Niedbal, N., Klusowski, E.   +3 more
openaire   +3 more sources