Optimal Design of Dampers and Stiffeners in Structures Using Active Control Approaches

Reinhorn, A. M.; Glück, Nikolai; Gluck, J.; Levy, Robert

doi:10.1142/9789812811707_0041

Cited by 2 publications

(2 citation statements)

References 8 publications

(10 reference statements)

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“…As it was mentioned above the addition of damper controllers has a positive influence on the dynamic behaviour of regular or irregular structures. In order to effectively control the seismic response, damping parameters of energy dissipation devices as well as their position must be optimized (Reinhorn 2000).…”

Section: O P T I M U M Of Damping Parameter-controlled Modesmentioning

confidence: 99%

Seismic control of regular and irregular buildings using viscoelastic passive dampers

Sophocleous

2001

J. Struct. Control

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This paper illustrates the vibration control effectiveness of passive viscoelastic dampers for regular or irregular structures. Its optimum installation location is determined from the controlled mode shape values and the optimal system parameters of the viscoelastic passive dampers are evaluated by minimizing the modal displacement response and maximizing the damping energy dissipation capacity between the structure with and the structure without the dampers. The analytical results of the parametric investigation show that the seismic response of regular or irregular structures are greatly improved by using viscoelastic dampers, leading to an alternative method of strengthening compared to the traditional rehabilitation techniques.

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Section: O P T I M U M Of Damping Parameter-controlled Modesmentioning

confidence: 99%

Seismic control of regular and irregular buildings using viscoelastic passive dampers

Sophocleous

2001

J. Struct. Control

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“…Choura et al [8] developed a strategy for passive vibration confinement of a two-degree-of-freedom oscillator. Ribakov et al [8], Reinhorn et al [16,17], and Gluck et al [10] synthesized optimal control laws using LQR. These laws are adopted for the design of linear passive viscous devices according to their deformation and velocity.…”

Section: Introductionmentioning

confidence: 99%

Passive Control of Flexible Structures by Confinement of Vibrations

Chtiba

Choura

El-Borgi

et al. 2007

Shock and Vibration

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We propose a two-step strategy for the design of passive controllers for the simultaneous confinement and suppression of vibrations (SCSV) in mechanical structures. Once the sensitive and insensitive elements of these structures are identified, the first design step synthesizes an active control law, which is referred to as the reference control law (RCL), for the SCSV. We show that the problem of SCSV can be formulated as an LQR-optimal control problem through which the maximum amplitudes, associated with the control input and the displacements of the sensitive and insensitive parts, can be regulated. In the second design step, a transformation technique that yields an equivalent passive controller is used. Such a technique uses the square root of sum of squares method to approximate an equivalent passive controller while maximizing the effects of springs and dampers characterizing passive elements that are added to the original structure. The viability of the proposed control design is illustrated using a three-DOF mechanical system subject to an excitation. It is assumed that all of the masses are sensitive to the excitation, and thus the vibratory energy must be confined in the added passive elements (insensitive parts). We show that the vibration amplitudes associated with the sensitive masses are attenuated at fast rate at the expense of slowing down the convergence of the passive elements to their steady states. It is also demonstrated that a combination of the RCL and the equivalent passive control strategy leads to similar structural performance.

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Optimal Design of Dampers and Stiffeners in Structures Using Active Control Approaches

Cited by 2 publications

References 8 publications

Seismic control of regular and irregular buildings using viscoelastic passive dampers

Seismic control of regular and irregular buildings using viscoelastic passive dampers

Passive Control of Flexible Structures by Confinement of Vibrations

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