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Showing 1 to 20 of 30 for “"Tuned Mass Damper"”.
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Real time tuned mass damper simulation system
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Vibration isolation systems using hysteretic multiple tuned mass damper oscillators
The subject of this study is the vibration isolation effect of linear and nonlinear hysteretic single degree of freedom oscillators attached to a structure. The system of oscillators, attached to the main structure, reduce the amplitude of its structural response, over a wide frequency band …
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Effects of a tuned mass damper on wind-induced motions in tall buildings
… of a building to wind loads, one of which is the Tuned Mass Damper system. This system, which consists of an auxiliary mass added to a structure, significantly reduces motions in high-rise buildings. However, the theory is often based on a harmonic excitation of a building, which is not …
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The tuned mass damper inerter for passive vibration control and energy harvesting in dynamically excited structural systems
… vibration control configuration, namely the Tuned-Mass-Damper-Inerter (TMDI) is proposed in this work. The TMDI combines the “inerter”, a mechanical two-terminal flywheel device developing resisting forces proportional to the relative acceleration of its terminals, with the well-known and …
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Vibration Reduction and Energy Harvesting using Motion-Rectified Tuned Mass-Damper-Inerters in Semi-Submersible Offshore Wind Platforms
… structures. This paper compares traditional tuned-mass dampers (TMDs) and tuned-mass damper inerters (TMDIs) with a nonlinear TMDI which utilizes a mechanical motion rectifier (MMR) to translate bidirectional to unidirectional motion of the primary generator shaft. The integration of the MMR …
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Seismic Performance of Rail-Counterweight System of Elevator in Buildings
… of the system using additional discrete viscous dampers. However, there is not much space available for installing the devices, and placement parallel to the spring at the roller guide assemblies is not quite effective due to contact between the restraining plate at the roller guide assemblies …
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Dynamic range implications for the effectiveness of semi-active tuned mass dampers
… traditional solution is the implementation of a tuned mass damper (TMD), which acts as a passive damping device in the region of the tuned frequency. However, TMDs exhibit a limited bandwidth and often require a significant mass. Active systems, such as the active mass driver, have been utilized …
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A study on energy harvesting through the use of electromagnetic dampers in motion control schemes
… investigates the use of the electromagnetic damper as an energy harvesting device in multiple damping schemes. It is shown that the use of the electromagnetic damper in a tuned mass damper scheme produces the most available energy to be harvested.
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Vibration analysis and control of dynamics effects of moving vehicles over bridges
… moving vehicles, vibration control devices such Tuned Mass Dampers (TMD) and Multiple Tuned Mass Damper (MTMD) are presented. Results from different authors are included, which allow assessing the applicability and effectiveness of these methods.
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Input identification, footbridge control and non-linear identification of a MR damper
… footbridge and the use of a semi-active tuned mass damper. In this respect, the work appears threefold since the first and third part regard identification of a realistic model for the damping device and semi-active control of the magneto-rheological damper. In this respect, input …
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Wind effect on long span bridge
… Thus, to optimize the structure, design of a tuned mass damper is included as well. Summarily, wind effect on long span bridge is predictable and could be well controlled by various means based on the analysis in this thesis.
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Active vibration control for a free piston stirling engine with linear alternator FPSE/LA
… is a synchronous machine that is designed and tuned to operate at 50Hz ± 0.5Hz. This type of technology has to comply with the new regulations that imposes a<br/>wider operating envelop (47Hz-53Hz).<br/><br/>This engine suffers from continuous self-induced vibrations caused by the reciprocating …
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Renovation proposal for Fenway Park
… scheme is a flexible structure that implements a Tuned Mass Damper to mitigate the vibrations of the cantilevered deck. A design proposal is presented with standard steel sections. It is concluded that the second option is not feasible because it does not comply with the deflection criterion.
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Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control
… research is to establish the effectiveness of tuned-mass-dampers (TMD) using semi-active magneto-rheological (MR) dampers to mitigate annoying floor vibrations. Annoying floor vibration is becoming more common in today's building structures since building materials have become stronger and …
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Seismic performance, design and placement of multiple tuned mass dampers in building applications
<p>"Extensive investigations have indicated that tuned mass dampers (TMD) are not very effective for seismic applications. One of the reasons is that both the fundamental and higher vibration modes may play important roles in the seismic responses of building structures while the conventional …
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Element and system design for active and passive vibration isolation
… ground transmission at high frequency, but tuned-mass dampers are decoupled from the ground. We explore the tuned-mass damper as a passive realization of the skyhook damper, obtain the optimal designs for multiple-SDOF systems of dampers, propose the concept of a multi-DOF damper, and show …
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A dynamic damping device for payload pendulations of construction cranes
… theoretical design, and physical testing. Tuned mass damping will be investigated as the basis for the damping control method. Theory will be detailed and incorporated in a mathematical simulation. The tuned mass damper, a cantilevered rod, will be designed and tested for application. The …
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High amplitude response behavior of a linear oscillator-nonlinear absorber system: Identification, analysis, and attenuation by using a semi-active absorber in series
… structure"). The simplest auxiliary absorber, a tuned mass damper (TMD), provides reliable narrow-band attenuation but is not robust to the effects of detuning. Strongly nonlinear tuned mass dampers (NTMDs) are capable of wide-band, irreversible energy transfer known as "energy pumping" but can …
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Active vibration control of civil engineering structures
… effective energy dissipation is achieved in Tuned Mass Damper systems and the limitation of these devices under stiffness degradation when the structure enters the inelastic region. Linear Quadratic Gaussian and H-infinity active control schemes are designed, simulated and assessed for …
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Energy harvesting of random wide-band vibrations with applications to an electro-magnetic rotational energy harvester
… and/or stochastic. As such, a resonant tuned-mass damper, with a narrow band-width, filters and discards much of the energy in the vibration spectrum, or worse, resonant harvesters will not resonate in stochastic environments. Several solutions are commonly proposed for harvesting energy …
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