Design, construction and testing of an adaptive pendulum tuned. Vibration control in a 101storey building using a tuned mass. Sensors free fulltext vibration suppression of wind. Sakr in 2015 studied on vibration control of buildings by using partial floor loads as multiple tuned mass dampers.
In an attempt to overcome this limitation, initially, such a drawback can be overcome through use of multiple tuned mass dampers, of which each tmd is tuned to a specific frequency of the main system 46. Seismic response of multistory structure with multiple tuned mass friction dampers alka y. Tuning is the main parameter in vibration control problem. It is defined as the ratio of the natural frequency of damper to the natural frequency of structure. Design of multiple tuned mass dampers on flexible structures. Vibration control in a 101storey building using a tuned mass damper alex y. An integral form for the impedance is developed by asymptotic techniques.
The dynamic responses of the wind turbine as well as the vibration mitigation effects of a single tuned mass damper stmd and a multiple tmds mtmd system are examined. The criterion selected for the optimality is the minimization of the steady state displacement of the main system under harmonic base acceleration. The approach is presented by simulation of a quartercar model. Tuned mass damper, optimization, multiple response, harmony search, metaheuristic. The multimode control is achieved using distributed multiple tuned mass dampers dmtmds. A storey benchmark building is m odeled as shear type structure with a lateral degree of freedom at each oor, and tuned mass dampers tmds are installed at topdi erent oors. Tuned mass damper tmd is one of the oldest passive devices, and it has been very much used for vibration control in buildings around the. The primary objective of this research is to find the effectiveness of an adaptive multiple tuned mass damper distributed along with the story height to control the seismic response of the structure. Fundamental characteristics of multiple tuned mass dampers for. Initially, a tuned mass damper is integrated on a vehicle model and its optimal parameters are determined by using 3d diagram of the maximum magnitudes of the sprung mass frequency response. Control of floor vibration and noise using multiple tuned mass dampers article pdf available in noise control engineering journal 596.
Research article distributed multiple tuned mass dampers. Introduction tuned mass dampers tmds or vibration absorbers. Tuned mass damper tmd is one of the oldest passive devices, and it has been very much used for vibration control in buildings around the world. It can be incorporated into an existing structure with less interference than other devices. Performance of distributed multiple viscoelastic tuned. Dynamic characterization of multiple tuned mass dampers and. Researcharticle seismic control of tall buildings using distributed multiple tuned mass dampers hamid radmard rahmani and carsten ko. A novel distributed tuned mass damper design approach. The thesis titled optimization of multiple tuned mass damper parameters using evolutionary operation algorithm considering soilstructure interaction submitted by bushra islam, roll.
Pdf control of floor vibration and noise using multiple. A parametric study was conducted to investigate the effectiveness of multiple tmds mtmds in reducing the response of a torsionally coupled system 7. Effectiveness of tuned mass dampers in vibration control. Pdf multiple tuned mass damper for multimode vibration. Relatively small mass springdashpot systems calibrated to be in resonance with a particular mode of vibration. Optimal design theories and applications of tuned mass dampers. The tuned mass dampers, consisting of one larger mass block i. The distributed tuned mass damper system, which is defined as the multiple tuned mass damper design based on one specific vibration mode of the main. Vibration control of buildings by using partial floor. Earthquake, multiple tuned mass dampers, single tuned mass damper, time history. However, the best parameters in terms of stiffness and damping and the best position of the tmd to be installed in the. The tuned mass damper tmd has many advantages compared with other damping devices.
Dynamic analysis of structures with multiple tuned mass dampers article pdf available in journal of civil engineering and management 151. Multiple tuned mass dampers for vibration control of high. Tuned frequency ratio at multiple excitation frequencies. Multiple tuned mass dampers mtmds consisting of many tuned mass dampers tmds with distributed natural frequencies are considered for suppressing effectively the harmonically forced single mode response of structures. The idea in the back of a tuned mass damper is that if a more than one diploma of. They are frequently used in power transmission, automobiles, and buildings. A reinforced concrete rc chimney is considered as an. The effectiveness and robustness of a particular version of mtmd, called the multiple dual tuned mass dampers, is analysed in the paper han, li 2006. Seismic vibration control of skew bridges using multiple. Full states of the dynamic system of multiple degreeoffreedom mdof structures, multiple tmds mtmds installed at different stories of the building, and the power spectral density psd function of environmental disturbances are taken into account.
Multiple tuned mass dampers mtmds can have two different distributions. Single tuned mass damper tmd is one kind of passivetype devices and has been successfully installed in many highrise buildings, observatory towers, and longspan bridges since 1971. The translationtorsion coupled vibration is tuned by the movement of the mass blocks and the torsional pendulums. The optimum parameters of multiple tuned mass dampers mtmd for suppressing the dynamic response of a baseexcited damped main system are investigated by a numerical searching technique. The next step is to convert these properties into a physical form appropriate to the site e. Multiple response optimization of tuned mass dampers. Pdf vibration isolation platform with multiple tuned mass.
Tuned mass dampers massachusetts institute of technology. The purpose of this paper is to propose an alternative approach on controlling of vehicle vibrations by using active tuned mass damper. New optimal tmd parameters are suggested which provide better performance than those suggested in the literature. The parameters of a tuned absorber damper are selected such that their resonant frequencies match the disturbance frequency for tuned absorption or resonant frequency of a particular mode for tuned damping of an.
Adaptive multiple tuned mass dampers based on modal. Genetic algorithm ga, multiple tuned mass damper mtmd. Vibration control of structures by multiple mass dampers. Design of multiple tuned mass dampers on flexible structures steen krenk and jan hogsberg department of mechanical engineering technical university of denmark, kgs. Pdf series multiple tuned mass dampers for vibration control of.
To have a good tradeoff between the resonance amplitude and the high frequency attenuation for the original vibration isolation platform, a novel vibration isolation system for reaction wheel rw, including a multistrut vibration isolation platform and multiple tuned mass dampers, is proposed. Multidimensional seismic control by tuned mass damper with. Pdf seismic control of tall buildings using distributed. An algorithm was developed to spend a limited mass either in a single tmd or in multiple tmds and distribute it optimally over the height of the building. Mtmds under real earthquake ground motions is investigated.
If tuned properly the maximum amplitude of the rst oscillator in response to a periodic driver will be lowered and much of the vibration will be transferred to the second oscillator. An optimal design theory for structures implemented with tuned mass dampers tmds is proposed in this paper. The idea of a tuned mass damper originates from frahm 1 and has been greatly in. Tuned mass damper also called vibration absorbers or vibration dampers is a device mounted to a specific location in a structure, so as to reduce the amplitude of vibration to an acceptable level whenever a strong lateral force such as an earthquake or high winds hit. Experimental and numerical studies on the performance of a custommade distributed multiple viscoelastic tmd. Daniel et al 2012 used multiple tuned mass dampers for control of seismic response of pedestrian bridges due to pedestrian traffic, so that multi tuned. Seismic response of multistory structure with multiple. Passive energy devices are well known due to their performance for vibration control in buildings subjected to dynamic excitations. Multiple tuned mass dampers mtmds distributed along height of a highrise building are investigated for their e ectiveness in vibration response control.
A short description of the various types of dampers and several building structures that contain tuned mass dampers follows. A tuned mass damper with nonlinear magnetic force for. The case is the base that is excited by the input base motion, yt. This paper investigates the optimum placement and properties of the tuned mass dampers tmds in tall buildings, which are employed to control the vibrations during earthquakes. Vibration control of a medical center floor system using tuned mass dampers and frame stiffening pdf multimode vibration control of a floor system using multiple tuned mass dampers pdf vibration control of a pharmaceutical laboratory floor system using stiffening and tuned damping pdf balcony, pier, and mezzanine vibration control. Vibration control in a 101storey building using a tuned. Optimization mtmd parameters based on response surface methodology rsm has been proposed in this approach. Dynamic characterization of multiple tuned mass dampers and some. Tuned mass dampers a tuned mass damper is a system for damping the amplitude in one oscillator by coupling it to a second oscillator. Seismic response of multistory structure with multiple tuned. The spring and damper elements are in mechanical parallel and support the seismic mass within the case.
Chapter 3 tuned liquid colum dampers there is nothing more. October 2009, has been accepted as satisfactory in partial fulfillment of. Mass distribution of multiple tuned mass dampers for. A mdof tmd consists of a rigid mass connected to a primary mass with damping and stiffness tuned to suppress vibration in as many as six modes of vibration of the primary structure. In this study, a new type of tmd system named pounding tuned mass damper ptmd was designed with a combination of a tuned mass and a viscoelastic layer covered delimiter for impact energy dissipation. Applying multiple tuned mass dampers to control structural. Vibration control of buildings by using partial floor loads. Their application can prevent discomfort, damage, or outright structural failure. Comprehensive numerical simulations of the windtrafficbridge coupled system with multiple ptmds mptmds were performed. Multiple tuned mass damper has been used to mitigate the vibration of the jacket supported offshore wind turbine structure. Tuned mass damper tmd a tmd consists of a mass mounted on a structure via a spring system and a viscous damper, preferably in a location where the structure.
The frequency of the damper is tuned to a particular structural frequency so. Seismic control of tall buildings using distributed multiple. Multiple tuned mass damper for multimode vibration reduction. A tuned mass damper tmd is a speciallydesigned structuralmechanical element that can be incorporated into a new structure during the design phase or added to an existing structure to reduce the vibration of the structure. Overview of tuned mass dampers what is a tuned mass damper.
Dynamic analysis of space structures with multiple tuned mass. Multiple tuned mass dampers mtmd consist of a large number of small oscillators with natural frequencies distributed around the natural frequency of a controlled mode of the structure. Design of multidegreeoffreedom tunedmass dampers using. To study the response of the building in term of displacement. Abstract the effectiveness of multiple tuned mass friction dampers mtmfd for vibration control of structure over a single tuned mass friction damper stmfd is investigated. Abstract multiple tuned mass dampers mtmds consisting of many tuned mass dampers tmds with distributed natural frequencies are considered for. In the case of a harmonic force acting on the system,ptpei t,thedisplacement, velocity and acceleration of the main system are expressed as. If only a single damper is tuned to the sth mode of vibration with frequency. General analytical formulae to predict the response of a floor fitted with multiple identical tmds are developed. Han and li 2006 investigated the vibration control capacity of active multiple tuned mass damper amtmd with identical stiffness and damping coefficient but. However, if a group of dampers are designed to tune to the frequency. For instance piezoelectric devices 345 or tuned mass dampers 6, 7 could be considered for such purpose.
In this paper an effective method has been proposed for designing optimal multiple tuned mass dampers mtmds to mitigate the seismic response of structures based on defining an optimization problem which considers the parameters of tuned mass dampers tmds as variables and minimization of maximum structural response as an objective function. A tuned mass damper tmd, also known as a harmonic absorber or seismic damper, is a device mounted in structures to reduce the amplitude of mechanical vibrations. Vibration control of vehicles with active tuned mass damper. Response surface method jacket supported offshore wind turbine multimode approach a b s t r a c t with the wide spreads of the wind energy production industry, the demand for the safe and feasible design of wind turbine structures is growing. Robust optimum design of multiple tuned mass dampers for. It requires a mass damper tuned to the fundamental mode of the structure, consisting of a massive steel sphere, in order to counteract the buildings oscillations and concluded tuned mass damper technology is. The tmd works by imposing a reaction force fr through the rigid bar labeled b. Distributed multiple tuned mass dampers for wind response.
Performance of distributed multiple viscoelastic tuned mass. The project aims and study of two devices, the single tuned mass damper and multiple tuned mass damper using new control strategy. The seismic performance of a 10story building was investigated, which proved the efficiency of the adaptive multiple tuned mass damper. The result is used to analyze the vibration control capabilities of multiple tmds for structures subjected to wideband input. For example a tuned mass damper with an adjustable stiffness is a semiactive vibration control device. Vibration control of three large balconies in a performing arts center using tuned mass dampers pdf vibration control of a long span balcony using a tuned mass damper pdf vibration control of a concrete, cantilever pier using tuned mass dampers pdf vibration control of a cantilever overlook. In the present paper, the modal characteristics and efficiency of the mtmd are studied analytically. Yy are arranged in increasing order of magnitude and. The designer may eventually choose which kind of tmd configuration is appropriate based on the following considerations. If tuned properly the maximum amplitude of the rst oscillator in response to a periodic driver will be lowered and much of the. International journal of civil and structural engineering volume 3 issue 1 2012 73 of viscous type specified by the damping ratio.
This article is published with open access at abstract the effectiveness of multiple tuned mass friction. The capability of optimal single and multiple tuned mass 471 studied 1517. Pdf dynamic analysis of structures with multiple tuned mass. The performance of multiple mass dampers under both wind and seismic excitation is analysed by kareem and kline 1995. As a solution, clark proposed in 1988 to use multiple tuned mass dampers mtmd to control the structural vibration in a wider. Designing optimal multiple tuned mass dampers using genetic. In order to simultaneously control the translational responses and the torsional angle of asymmetry structures, a new type of tuned mass damper with tuned mass blocks, orthogonal poles, and torsional pendulums tmdpp is proposed. Research article distributed multiple tuned mass dampers for. Designing a tunedmass damper is a multistep process. Mass distribution of multiple tuned mass dampers for vibration control of structures bandivadekar t.
Shang2 1department of civil engineering, tamkang university, tamsui, taiwan 251, r. First, structural dynamics analyses of the structure are performed to determine the tmd characteristics mass, stiffness, and damping required to achieve the desired level of vibration mitigation. Vibration control using multiple tuned mass dampers. Intro to structural motion control purdue engineering. Pdf on aug 31, 2016, v kahya and others published series multiple tuned mass dampers for vibration control of highspeed railway bridges. An alternative to both passive and active tuned absorbersdampers is passive control solution with some degree of adjustability known as semiactive vibration control. Introduction a tuned mass damper is a passive control device consisting of a lumped mass w ith a spring and a viscous damper attached properly to the main structure to reduce any undesirable vibration of the system. Tuned mass damper components, working and applications.