Results 251 to 260 of about 4,345,353 (297)

Cable Modal Parameter Identification. I: Theory

Journal of Engineering Mechanics, 2009
Cable modal parameters (natural frequencies and damping ratios) that represent the cable inherent dynamic characteristics play an important role in the construction, vibration control, condition assessment, and long-term health monitoring of cable-supported structures.
Wei-Xin Ren, Wei-Hua Hu
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Identification of Modal Parameters of Rotors

1984
The occurence of instability in rotating machinery may be caused by different effects: oil film in journal bearings, sealings, internal damping etc.
openaire   +1 more source

Identification of time varying modal parameters

The Aeronautical Journal, 1990
AbstractThe ability to track time varying frequency and damping parameters using on-line versions of seven time domain system identification algorithms; Least Squares, Double Least Squares, Correlation Fit, Instrumental Variables, Instrumental Matrix with Delayed Observations, Extended Least Squares and Maximum Likelihood, is examined.
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Multi‐modal parameter identification by automata approach

Journal of the Chinese Institute of Engineers, 1993
Abstract In this paper, we consider the multi‐modal function optimization problem. An automata model with improved learning schemes is proposed to solve the global optimization problem. Theoretically, we prove that the automaton converges to the global optimum with a probability arbitrarily close to 1.
Zen‐Kwei Huang, Sheng‐De Wang, Te‐Son Kuo   +2 more
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Identification of modal parameters from transmissibility measurements

Journal of Sound and Vibration, 2008
Abstract It is a well-known fact that linear dynamic behavior of structures can be studied by modeling the relation between force(s) [input(s)], acting on a structure, and their resulting structural vibration response(s) [output(s)]. For industrial structures, in their real in-operation conditions, it often becomes hard (or impossible) to ...
Devriendt, Christof, Guillaume, Patrick
openaire   +3 more sources

Modal Testing and Parameters' Identification of Spray Boom

Applied Mechanics and Materials, 2014
In order to research dynamic characteristics of the spray boom, this paper described a modal testing about a self-designed spray boom, the testing introduced the way that multi points and multi directions exciting, one point and one direction response to obtain the FRFs, after importing the dates to the computer, accorded to the stability diagram which
Yao Jie He, Bai Jing Qiu, Ya Fei Yang
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Modal parameter identification for a GFRP pedestrian bridge

Composite Structures, 2008
Dynamic experiments were conducted on an all-FRP composite pedestrian bridge. The structure was excited by impact and human-induced vibrations. The peak-picking method and stochastic subspace identification method were used to extract structural dynamic characteristics without knowing the input excitation. Both methods proved to be applicable as output-
Bai, Yu, Keller, T
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Identification of the Modal Parameters of a Flexibly Supported Casing

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, 1997
Satisfactory means for evaluating the vibration behaviour of gas turbine installations where it is impractical to obtain a satisfactory model of the support structure and where it has natural frequencies in the operating range are not yet available.
N. S. Feng, Eric J. Hahn
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A DUAL FITTING ALGORITHM FOR MODAL PARAMETERS IDENTIFICATION

Mechanical Systems and Signal Processing, 2003
A dual fitting algorithm (DFA) for modal parameters identification is presented. The method is implemented in three steps: first, the coefficients of the Forsythe orthogonal polynomials for the rational fraction of the frequency response functions (FRFs) are obtained by fitting the experimental FRF data; then the coefficients of the orthogonal ...
H.H. CHEN, F. XU
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On the automatic identification of modal parameters by subspace methods

2011
The paper presents an alternative approach for the automatic selection of modal parameter estimates obtained by subspace methods. The proposed methodology represents an improved version of existing approaches and it is based on a noise modes elimination procedure and on a clustering analysis.
UBERTINI, Filippo, Gentile, Carmelo, MATERAZZI, Annibale Luigi   +2 more
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