Auteur Betti, Raimondo
Documents disponibles écrits par cet auteur (21)
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Lee, Vincent W., Auteur ; Luo, Hao, Auteur ; Liang, Jianwen ; Betti, Raimondo, Éditeur scientifique |An improved accurate closed-form wave function analytic solution of two-dimensional scattering and diffraction of antiplane SH waves by a semicircular cylindrical hill on an elastic half space is presented. In the previous solution, stress and d[...]
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Naif B. Almutairi, Auteur ; Hassan, M. F., Auteur ; Abdel-Rohman, M. ; Terro, M. ; Betti, Raimondo, Éditeur scientifique |The flexibility and low damping of the long-span suspended cables in the suspension bridges make them prone to vibrations due to wind and moving loads, which affect the dynamic response of the suspended cables and the bridge deck. This paper sho[...]
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Chen, Su Huan, Auteur ; Zhang, Xiao Ming, Auteur ; Betti, Raimondo, Éditeur scientifique |Using the interval finite-element method, the vibration control problem of structures with interval parameters is discussed, which is approximated by a deterministic one. Based on the first-order Taylor expansion, a method to solve the interval [...]
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Huang Jin H., Auteur ; Liu, Yu-Chen, Auteur ; Betti, Raimondo, Éditeur scientifique |The paper deals with the fully coupled response characteristics of a multilayered composite plate with piezoelectric layers. The response quantities of the plate are coupled by the mechanical field and the electric field. Based on the three-dime[...]
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Richard E. Christenson, Auteur ; Spencer Jr., B. F., Auteur ; Johnson, Erik A. ; Betti, Raimondo, Éditeur scientifique |Stay cables, such as are used in cable stayed bridges, are prone to vibration due to their low inherent damping characteristics. Transversely attached passive vicous dampers have been implemented in many bridges to dampen such vibration. However[...]
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Lu, Z. R., Auteur ; Betti, Raimondo, Éditeur scientifique ; Law, S. S., Auteur |A new method is proposed for identifying the time history of the input excitation using the dynamic response of the structure. The sensitivities of dynamic response with respect to the parameters of the input force are calculated in the time do[...]
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Franco, Guillermo, Auteur ; Betti, Raimondo, Auteur ; Hilmi Lus ; Ghanem, Roger G., Éditeur scientifique |The problem of system identification is an inverse problem of difficult solution. Currently, difficulties lie in the development of algorithms that use measured data from the system to characterize it without significant a priori knowledge of th[...]
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Karim, Mohammed Réda, Auteur ; Hoo Fatt, Michelle S., Auteur ; Betti, Raimondo, Éditeur scientifique |A Numerical simulation of the aircraft impact into the exterior columns of the World Trade Center (WTC) was done using LS-DYNA. For simplification, the fuselage was modeled as a thin-walled cylinder, the wings were modeled as box beams. Actual m[...]
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Hilmi Lus, Auteur ; Ghanem, Roger G., Éditeur scientifique ; De Angelis, Maurizio ; Yu, Jun ; Betti, Raimondo, Auteur |This article briefly presents the theory for a system identification and damage detection algorithm for linear systems, and discusses the effectiveness of such a methodology in the context of a benchmark problem that was proposed by the ASCE Tas[...]
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Yang, Jann N., Auteur ; Shuwen Pan, Auteur ; Silian Lin ; Betti, Raimondo, Éditeur scientifique |System identification and damage detection for structural health monitoring of civil infrastructures have received considerable attention recently. Time domain analysis methodologies based on measured vibration data, such as the least-squares e[...]
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Modares, Mehdi, Auteur ; Mullen, Robert L., Auteur ; Muhanna, Rafi L. ; Betti, Raimondo, Éditeur scientifique |Frequency analysis of a structural system with bounded uncertainty is presented. An interval (set-theoretic) formulation is used to quantify the uncertainty present in the structure’s parameters such as material properties. Independent variation[...]
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T. Kijewski-Correa, Auteur ; Betti, Raimondo, Éditeur scientifique ; Ahsan Kareem, Auteur |Recently, there has been growing utilization of time-frequency transformations for the analysis and interpretation of nonlinear and nonstationary signals in a broad spectrum of science and engineering applications. The continuous wavelet transfo[...]
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Zhao, X. B., Auteur ; Hefny, A. M., Auteur ; Cai, J. G. ; Betti, Raimondo, Éditeur scientifique |When an elastic wave propagates through a rock mass, its amplitude is attenuated and velocity is slowed due to the presence of fractures. During wave propagation, if the shear stress at a fracture interface reaches the fracture shear strength, t[...]
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Alhan, Cenk, Auteur ; Betti, Raimondo, Éditeur scientifique ; Aldemir, Unual ; Gavin, Henri P., Auteur |Passive damping in shock and vibration isolation systems reduces the deformation of the isolation system but can increase the acceleration sustained by the isolated object. Semiactive (i.e., controllable) damping systems offer a solution to the[...]
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Lin, Chi-Chang, Auteur ; Chang, Chang-Ching, Auteur ; Chen, Huang-Lin ; Betti, Raimondo, Éditeur scientifique |An H+∞ direct output feedback control algorithm through minimizing the entropy, a performance index measuring the tradeoff between H+∞ optimality and H2 optimality, is developed in this paper to reduce the earthquake response of structures. To a[...]
