نتایج جستجو برای: beam modal function model

تعداد نتایج: 3203367  

2013

This experiment consists of determining the modal properties of a model structure. Many buildings in the practical world can be reasonably approximated by shear structures in which only one translational degree of freedom is taken into account for each floor level. Due to the simple characteristics of a shear structure, it is possible to determine its modal properties, such as the natural frequ...

2003
M. A. NASSER

This paper aims to introduce two new adaptive designs of vibration control systems. First is an absorber and the second is an isolator. Absorbers are used for suppressing unwanted vibrations, while isolators isolating them. Structural parameter changes and excitation directions significantly affect the behavior of the conventional passive controllers. A Tuned Stiffness Damper (TSD), stepper mot...

Journal: : 2023

In this study, a genetic algorithm (GA) is used to detect damage in curved beam model, stiffness as well mass matrices of the elements formulated using Hamilton's principle. Each node element possesses seven degrees freedom including warping degree freedom. The had been derived based on Kang and Yoo’s thin-walled theory. identification an optimization problem, binary continuous algorithms(BGA, ...

2002
Richard V. Field

This study presents a combined analytical and experimental effort to characterize and improve the ride qua/;ty of the Department Of Energy fractork?i/er combination. The focus is to augment the experimental test results with the use of a high quality computer model. The discussion includes an overview of the finite element model of the vehicle and experimental modal tesf results. Sysfem identif...

F. Abdollahi, S. M. Tavakkoli,

In this paper, topology optimization is utilized for damage detection in three dimensional elasticity problems. In addition, two mode expansion techniques are used to derive unknown modal data from measured data identified by installed sensors. Damages in the model are assumed as reduction of mass and stiffness in the discretized finite elements. The Solid Isotropic Material with Penalization (...

Journal: :Journal of Civil Engineering, Environment and Architecture 2015

Journal: :International Journal of Research in Engineering and Technology 2016

Journal: :Mechanical Systems and Signal Processing 2013

2010
George V. Frisk

An experimental technique is being developed for mapping the normal mode field and its wavenumber spectrum as a function of position in a complex, shallow-water waveguide environment whose acoustic properties vary in three spatial dimensions. By describing the spatially varying spectral content of the modal field, the method provides a direct measure of the propagation characteristics of the wa...

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