A New Approach to Seismic Isolation: Possible Application in Space Structures

Tatemichi, Ikuo; Kawaguchi, Masashi

doi:10.1260/0266351001495044

Cited by 12 publications

(7 citation statements)

References 1 publication

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“…Mu + Cu + Ku B B (1) u denotes the displacement of the structure with DVA; M, C, and K are the structural mass, damping and stiffness matrix, respectively. f p , f q and u are the excitation force acting on p and q coordinate and the displacement vector of the structure, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In general, there are two main approaches that can be used to improve the structural resistance against the dynamic load. The most popular method is by using the flexible foundation or vibration isolator [1]. This vibration attenuation device was successfully applied to several types of structures such as bridges and buildings in many countries.…”

Section: Introductionmentioning

confidence: 99%

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Vibration Response Suppression of Space Structure using Two U-Shaped Water Container

Son

Bur

Satria

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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Nowadays, a passive vibration control technique using dynamic vibration absorbers (DVA) has drawn many researchers' attention in the structural dynamic field. The reason is that this technique is simple and it can work effectively in reducing the vibration response when its parameters are optimally designed. The DVA fundamental concept is the addition of a new vibration system to the primary system. This new system addition causes reduction of the vibration response of the primary system during excited by a dynamic load. One simple technique to realize the DVA for structural application is by using water vibration. This research is aimed to develop one type of dynamic vibration absorber using the water vibration system in a U-shaped container for a two-story building structure model. Besides being used as the dynamic absorber, this U-shaped container is also functioned as the water storage tank in the building. Regarding reduce the first bending mode response of the structure in x-z and y-z plane, two Ushaped water storage tanks are placed on the upper floor of the building. The dimensions of the water storage tanks are designed so that the natural frequency of moving water in the tank is the same as the natural frequency of the first bending mode of the structure in x-z and y-z plane. The performance of dynamic absorber is evaluated by applying the impulsive and seismic loads on the building. The simulation results show that the U-shaped water storage tank placed on the upper floor of the building can reduce the response amplitude of the structure under impulsive loads. Meanwhile, for the seismic load case, the performance of dynamic absorber is clearly seen when the excitation frequency is close to the natural frequency of the building structure.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibration Response Suppression of Space Structure using Two U-Shaped Water Container

Son

Bur

Satria

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…In this paper, the damping described by the fractional derivatives is analyzed. In the engineering practice, the systems containing a spherical pendulum can be used to model the dynamics of certain types of structures, such as cranes [4][5][6][7][8][9], seismic isolators [10], vibration absorbers [11][12][13], energy harvesters [14], inertial sensors [15]. Thus the dynamics of systems with a spherical pendulum is an interesting subject of scientific research and have been analyzed in a number of studies [7-9, 11, 13-26].…”

Section: Introductionmentioning

confidence: 99%

“…The second type of studies concerns the dynamics of structures with a spherical pendulum [4][5][6][7][8][9][10][11][13][14][15]. Abdel-Rahman et al [4] presented a survey of crane models published in the literature, their classification and discussion of their applications and limitations.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a coupled mechanical system containing a spherical pendulum and a fractional damper

Freundlich

Sado

2020

Meccanica

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The presented work deals with nonlinear dynamics of a three degree of freedom system with a spherical pendulum and a damper of the fractional type. Vibrations in the vicinity of the internal and external resonance are considered. The system consists of a block suspended from a linear spring and a fractional damper, and a spherical pendulum suspended from the block. The viscoelastic properties of the damper are described using the Caputo fractional derivative. The fractional derivative of an order of $$0 < \alpha \le 1$$ 0 < α ≤ 1 is assumed. The impact of a fractional order derivative on the system with a spherical pendulum is studied. Time histories, the internal and external resonance, bifurcation diagrams, Poincaré maps and the Lyapunov exponents have been calculated for various orders of a fractional derivative. Chaotic motion has been found for some system parameters.

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“…Many previous researches were actually conducted related to the models of the energy absorber in buildings. The introduced models were varied, such as pendulum isolator [7], lead rubber bearing [8], viscous damper [9], friction damper [10]. All these models were installed into space structures with a role to reduce the displacement due to seismic load.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Analysis of Steel U-Damper for Space Structures

Satria¹,

Son²,

Haris³

et al. 2018

International Journal on Advanced Science, Engineering and Information Technology

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This paper is a part of research in searching an appropriate damper for space structures constructed in seismic areas. The study investigates a stiffness, strength and energy dissipation of the damper under loading. For this purpose, a U-shaped hysteresis steel damper is modeled and analyzed by a nonlinear finite element technique which involves both geometrical and material nonlinearities. The model is subjected to a monotonic increasing load which is applied horizontally until one cycle of hysteresis is formed. The stiffness, strength, and energy dissipation of the damper is directly determined from the graph of load-displacement. Feasibility of the hysteresis damper is investigated further for application on building construction. The damper is placed on the roof and supporting structure of the building. A 2-DOF spring-mass model, as a simple modelling of the building is introduced with damper's properties are taken from the results of the first study. A seismic load is applied to see the response of the model. The static numerical analysis showed that the properties of the introduced damper, such as stiffness, strength and energy dissipation, are depending on the geometry of the damper. The results show that reducing the length of lower plate or height of the damper will increase stiffness, strength and energy absorption. In contrary, reducing the width of the damper will decrease all properties. Moreover, the results of the dynamic analysis show the feasibility of damper to reduce to reduce the amplitudes of the response of the roof under seismic load.

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A New Approach to Seismic Isolation: Possible Application in Space Structures

Cited by 12 publications

References 1 publication

Vibration Response Suppression of Space Structure using Two U-Shaped Water Container

Vibration Response Suppression of Space Structure using Two U-Shaped Water Container

Dynamics of a coupled mechanical system containing a spherical pendulum and a fractional damper

Static and Dynamic Analysis of Steel U-Damper for Space Structures

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