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Academic literature on the topic 'Multiple tuned mass dampers'

Author: Grafiati

Published: 3 June 2025

Last updated: 7 July 2025

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Journal articles on the topic "Multiple tuned mass dampers"

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Parveen P, Sadha, and Anila S. "Seismic Analysis of RCC Buildings Using Water Tanks as Tuned Liquid Mass Dampers." Journal of Recent Activities in Architectural Sciences 8, no. 1 (2023): 20–28. http://dx.doi.org/10.46610/joraas.2023.v08i01.003.

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A Tuned Mass Damper (TMD) is a device that is mounted to a structure to reduce the dynamic response of the structure. It is made up of a mass, a spring, and a damper. The damper's frequency is tuned to a specific structural frequency, and when that frequency is excited, it will resonate in an opposite direction to the structural motion. Tuned Liquid Mass Dampers are more recommended when compared to Tuned Mass Damper due to their respective advantages. The overhead water tanks can act as Tuned Liquid Mass Dampers. In this study, the overhead water tanks in RCC buildings are used to represent liquid-tuned mass dampers. The impact of Multiple Liquid Tuned Mass Dampers on the RCC buildings with and without tuned liquid mass dampers is to be studied. Utilizing response spectrum analysis, the study was conducted on buildings that have hexagonal and rectangular shapes. The trials are repeated by changing the water levels in tanks to empty, one-third level, two-thirds level and full water tank conditions. Comparisons of seismic parameters are done for demonstrating the functionality of a tuned liquid mass damper.

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Rahman, Mohammad Sabbir, Md Kamrul Hassan, Seongkyu Chang, and Dookie Kim. "Adaptive multiple tuned mass dampers based on modal parameters for earthquake response reduction in multi-story buildings." Advances in Structural Engineering 20, no. 9 (2016): 1375–89. http://dx.doi.org/10.1177/1369433216678863.

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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. The seismic performance of a 10-story building was investigated, which proved the efficiency of the adaptive multiple tuned mass damper. Structures with single tuned mass damper and multiple tuned mass dampers were also modeled considering the location of the dampers at the top of the structure, whereas adaptive multiple tuned mass damper of the structure was modeled based on the story height. Selection of the location of the adaptive multiple tuned mass damper along with the story height was dominated by the modal parameters. Participation of modal mass directly controlled the number of the modes to be considered. To set the stage, a comparative study on the displacements and modal energies of the structures under the El-Centro, California, and North-Ridge earthquakes was conducted with and without various types of tuned mass dampers. The result shows a significant capability of the proposed adaptive multiple tuned mass damper as an alternative tool to reduce the earthquake responses of multi-story buildings.

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LI, CHUNXIANG. "PERFORMANCE OF DUAL-LAYER MULTIPLE TUNED MASS DAMPERS FOR STRUCTURES UNDER GROUND EXCITATIONS." International Journal of Structural Stability and Dynamics 06, no. 04 (2006): 541–57. http://dx.doi.org/10.1142/s0219455406002106.

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The dual-layer multiple tuned mass dampers (DL-MTMD) with a uniform distribution of natural frequencies are proposed, which consist of one large tuned mass damper (L-TMD) and an arbitrary number of small tuned mass dampers (S-TMD). The structure is represented by a generalized system corresponding to the specific vibration mode to be controlled. The criterion for assessing the optimum parameters and effectiveness of the DL-MTMD is based on the minimization of the minimum values of the maximum dynamic magnification factors (DMF) of the structure installed with the DL-MTMD. Also considered is the stroke of the DL-MTMD. The proposed DL-MTMD system is demonstrated to show higher effectiveness and robustness to the change in frequency tuning, in comparison to the multiple tuned mass dampers (MTMD) with equal total mass ratios. It is also demonstrated to be more effective than the dual tuned mass dampers (DTMD) with one large and one small tuned mass damper, but they maintain the same level of robustness to the change in frequency tuning. The DL-MTMD system can be easily manufactured as the optimum value for the linking dashpots between the structure and L-TMD is shown to be zero.

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Khazaei, Mohsen, Reza Vahdani, and Ali Kheyroddin. "Optimal Location of Multiple Tuned Mass Dampers in Regular and Irregular Tall Steel Buildings Plan." Shock and Vibration 2020 (September 16, 2020): 1–20. http://dx.doi.org/10.1155/2020/9072637.

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Tuned mass dampers are one of the most common devices for the passive control of structures subjected to earthquakes. The structure of these dampers consists of three main parameters: mass, damping, and stiffness. Tuned mass dampers reduce the amplitude of the responses affecting on a mode. In most cases, only a single TMD (tuned mass damper) or a few dampers at several points above the building height are installed on the roof of the building, requiring considerable mass and space in some parts of the structure as overhead. It is also more important to predict the elements that will meet the required mass. In this research, the performance of multiple tuned mass dampers (MTMDs) is investigated in L- and U-shaped regular and irregular tall steel buildings with 10 and 20 floors, under the near- and far-field records. Nonlinear time history analysis is also applied to evaluate the multiple tuned mass dampers effects on the seismic responses of the structures. The SAP2000 API and MATLAB genetic algorithm are used to determine the optimal location of the MTMDs in the roof plans of the buildings. The results show the effects of multiple tuned mass dampers in reducing the seismic response of acceleration, displacement, and base shear up to 50, 40, and 40% in average, respectively. The results of determining the optimum location of MTMDs in the models indicate the importance of the symmetry of the dampers relative to the centre of mass of the building.

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Wang, Min, Yan Lin Zhang, and Tao Zan. "Performance Optimization and Comparison of TMD, MTMD and DTMD for Machining Chatter Control." Advanced Materials Research 199-200 (February 2011): 1165–70. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1165.

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This paper investigates and analyzes the performances of several types of tuned mass damper (TMD) including common single TMD(STMD), multiple tuned mass dampers (MTMD) and dual tuned mass dampers (DTMD) on the machining chatter control. Considering the special nature of the machining stability problem, the optimal design parameters of the dampers are defined as those that minimize the magnitude of the real part of the FRF of the damped machining system. This paper demonstrates the performance of the optimally designed different TMDs for machining stability improvement by calculating the stability diagrams for the turning processes. The calculation results show that a more than 60% improvement in the critical limiting cutting depth can be obtained for the optimally designed MTMD (2 TMDs) compared to the optimally designed STMD, and a more than20% improvement for the optimally designed DTMD compared to the optimally designed MTMD(2 TMDs).

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Sobhanian, Reza, Jamshid Sabouri, and Rouzbeh Dabiri. "Optimal parameter design of multiple tuned mass damper for tall buildings using multi-objective particle swarm optimization algorithm considering soil-structure interaction effects." Cadernos de Educação Tecnologia e Sociedade 17, se3 (2024): 216–30. https://doi.org/10.14571/brajets.v17.nse3.216-230.

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This study focuses on controlling structural vibrations during earthquakes by utilizing tuned mass dampers (TMD) to minimize structural responses. The optimization of damper parameters is crucial for achieving this goal. The research explores the use of multiple tuned mass dampers (MTMD) in place of a single TMD in the roof story. The impact of soil-structure interaction (SSI) on seismic responses is considered, necessitating an investigation into optimizing damper characteristics across different floors. Equations of motion for structures with multiple dampers and SSI were developed, and the state-space method was employed for solving these equations. Generalized mass and stiffness matrices for structures with MTMD and SSI were presented. The study utilized the multiple objective particle swarm optimization (MOPSO) algorithm to determine optimal damper parameters. The parameters of these dampers should be determined in such a way that they lead to minimum seismic responses of the structure. By analyzing 40-story benchmark and 20-story structures, the research highlights the significant influence of SSI on the distribution and stiffness of dampers within the structures, emphasizing the importance of considering interaction effects in damper optimization.

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Xu, Ruotian, Jun Chen, and Xinqun Zhu. "A hybrid approach for parameter optimization of multiple tuned mass dampers in reducing floor vibrations due to occupant walking: Theory and parametric studies." Advances in Structural Engineering 20, no. 8 (2017): 1232–46. http://dx.doi.org/10.1177/1369433216684351.

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This article presents a hybrid approach for determining optimal parameters of multiple tuned mass dampers to reduce the floor vibration due to human walking. The proposed approach consists of two parts. The first one is a partial mode decomposition algorithm to efficiently calculate dynamic responses of the coupled floor–multiple tuned mass damper system subjected to moving walking loads. The second one is an adaptive genetic simulated annealing method for the optimization of multiple tuned mass damper parameters. To establish optimization, certain variables must be considered. These include the mass, natural frequency, and damping ratio of each tuned mass damper in a multiple tuned mass damper system. The objective is to minimize floor responses and remove unreasonable requirements, such as uniform mass distribution and symmetric distribution of the tuned mass damper frequency. The proposed hybrid approach has successfully been applied to optimize the multiple tuned mass damper system to reduce the vibration of a long-span floor with closely spaced modes. By the hybrid approach, an extensive parametric study has been carried out. The results show that different walking load models and uncertainties in the dynamic properties of the floor and each tuned mass damper itself can affect the overall performance of the multiple tuned mass damper system. The proposed hybrid optimization approach is very effective and the resulting multiple tuned mass damper system is robust in reducing floor vibrations under various conditions.

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BAKRE, S. V., and R. S. JANGID. "OPTIMUM MULTIPLE TUNED MASS DAMPERS FOR BASE-EXCITED DAMPED MAIN SYSTEM." International Journal of Structural Stability and Dynamics 04, no. 04 (2004): 527–42. http://dx.doi.org/10.1142/s0219455404001367.

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The optimum parameters of multiple tuned mass dampers (MTMD) for suppressing the dynamic response of a base-excited damped main system are investigated by a numerical searching technique. The criterion selected for the optimality is the minimization of the steady state displacement of the main system under harmonic base acceleration. The parameters of the MTMD that are optimized include: the damping ratio, the tuning frequency ratio and the frequency bandwidth. The optimum parameters of the MTMD system and corresponding displacement are obtained for different damping ratios of the main system and different mass ratios of the MTMD system. The explicit formulas for the optimum parameters of the MTMD (i.e. damping ratio, bandwidth and tuning frequency) are then derived using a curve-fitting scheme that can readily be used in engineering applications. The error in the proposed explicit expressions is investigated and found to be negligible. The effectiveness of the optimally designed MTMD system is also compared with that of the optimum single tuned mass damper. It is observed that the optimally designed MTMD system is more effective for vibration control than the single tuned mass damper. Further, the damping in the main system significantly influences the optimum parameters and the effectiveness of the MTMD system.

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Alnayhoum, Farah, Ibrahima Kalil Camara, Si̇nan Meli̇h Ni̇gdeli̇, and Gebrai̇l Bekdaş. "Multiple Tuned Mass Dampers and Double Tuned Mass Dampers for Soft Story Structures: A Comparative Study." Engineering World 5 (November 14, 2023): 167–74. http://dx.doi.org/10.37394/232025.2023.5.19.

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Recent seismic events have highlighted the vulnerability of reinforced concrete buildings, especially soft-story structures, to damage and collapse during strong earthquakes due to the ground's vibrational response. This study aims to mitigate these adverse vibrations using passive control mechanisms, particularly tuned mass dampers (TMDs). Conventional TMDs require a substantial mass to effectively influence the structure's lateral reactions. The research explores the use of multi-tuned mass dampers (MTMDs) and double-tuned mass dampers (DTMDs) in a soft-story building. The study uses MATLAB to estimate TMD parameters and subject the models to seismic loading. The comparative assessment of these models reveals the potential benefits of using MTMD and DTMD systems to enhance the seismic resilience of soft-story structures.

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Tophøj, Laust, Nikolaj Grathwol, and Svend Hansen. "Effective Mass of Tuned Mass Dampers." Vibration 1, no. 1 (2018): 192–206. http://dx.doi.org/10.3390/vibration1010014.

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Tuned Mass Dampers (TMDs) are widely used for the control and mitigation of vibrations in engineering structures, including buildings, towers, bridges and wind turbines. The traditional representation of a TMD is a point mass connected to the structure by a spring and a dashpot. However, many TMDs differ from this model by having multiple mass components with motions of different magnitudes and directions. We say that such TMDs have added mass. Added mass is rarely introduced intentionally, but often arises as a by-product of the TMD suspension system or the damping mechanism. Examples include tuned pendulum dampers, tuned liquid dampers and other composite mechanical systems. In this paper, we show how a TMD with added mass can be analyzed using traditional methods for simple TMDs by introducing equivalent simple TMD parameters, including the effective TMD mass, the mass of the equivalent simple TMD. The presence of added mass always reduces the effective TMD mass. This effect is explained as a consequence of smaller internal motions of the TMD due to the increased inertia associated with the added mass. The effective TMD mass must be correctly calculated in order to predict the TMD efficiency and in order to properly tune the TMD. The developed framework is easy to apply to any given general linear TMD system with a known motion. Here, we demonstrate the approach for a number of well-known examples, including tuned liquid dampers, which are shown to use only a small fraction of the total liquid mass effectively.

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Dissertations / Theses on the topic "Multiple tuned mass dampers"

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Chinien, Lomadeven Viken. "Design of multiple tuned mass dampers for mitigation of wind induced vibrations." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/11536.

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Rossato, Luciara Vellar. "Otimização de amortecedores de massa sintonizados em estruturas submetidas a um processo estacionário." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/163246.

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Atualmente as estruturas estão sendo avaliadas para um maior número de ações em relação há algumas décadas. Esta melhoria ao longo da fase de concepção é dada devido ao fato de que está se tornando mais competitivo o fornecimento de estruturas leves e esbeltas, sendo solicitados, cada vez mais, projetos com menor custo de implantação. Devido a isto, é necessário avaliar as estruturas não apenas sujeitas a cargas estáticas, mas também a carregamentos dinâmicos. As ações dinâmicas que atuam sobre uma estrutura podem ser muito mais prejudiciais do que as estáticas quando não são bem consideradas e dimensionadas. Ações dinâmicas podem ser provenientes de tremores de terra, vento, equipamentos em funcionamento, deslocamento de pessoas, veículos em movimento, motores desbalanceados, entre outras fontes, o que pode causar vibrações na estrutura, podendo levar a mesma ao colapso. A fim de controlar e reduzir as amplitudes de vibração, entre outras alternativas é possível a instalação de amortecedores de massa sintonizado (AMS), que é um dispositivo de controle passivo. O AMS tem várias vantagens, tais como a grande capacidade de reduzir a amplitude de vibração, fácil instalação, baixa manutenção, baixo custo, entre outras. Para se obter a melhor relação custo-benefício, ou seja, a maior redução de amplitude aliada a um menor número de amortecedores ou a uma menor massa, a otimização dos parâmetros do AMS tornase fundamental. Neste contexto, este trabalho visa, através de simulação numérica, propor um método para otimizar parâmetros de AMSs quando estes devem ser instalados em edifícios submetidos à excitação sísmica. Inicialmente é considerado apenas um único AMS instalado no topo do edifício e em seguida também são feitas simulações com múltiplos AMSs (MAMS), e por fim são descartados os AMSs desnecessários, obtendo assim a melhor resposta da estrutura. Para tanto, uma rotina computacional é desenvolvida em MatLab usando o método de integração direta das equações de movimento de Newmark para determinar a resposta dinâmica da estrutura. Para fins de análise podem ser considerados tanto sismos reais quanto artificiais. Os acelerogramas artificias são gerados a partir do espectro proposto por Kanai e Tajimi. Primeiramente, a estrutura é analisada somente com o seu amortecimento próprio para fins comparativos e de referência. Em seguida, a otimização do ou dos AMSs é feita, na qual a função objetivo é minimizar o deslocamento máximo no topo do edifício, e as variáveis de projeto, são a relação de massas (AMS - Estrutura), rigidez e amortecimento do ou dos AMSs. Para a otimização são utilizados os algoritmos Firefly Algotithm e Backtracking Search Optimization Algorithm. De acordo com as configurações do AMS, após a otimização dos seus parâmetros são determinadas as novas respostas dinâmicas da estrutura. Finalmente, pode-se observar que o método proposto foi capaz de otimizar os parâmetros do ou dos AMSs, reduzindo consideravelmente as respostas da estrutura após a instalação do mesmo, minimizando o risco de dano e colapso do edifício. Desta forma, este trabalho mostra que é possível projetar AMS e MAMS de forma econômica e eficaz.<br>Currently, structures are being evaluated for a greater number of actions when compared to a few decades ago. This improvement in designing stage is happening because projects providing lightweight and slender structures, with lower implantation costs, are being more requested. Thus, evaluating structures not only subjected to static loads, but also to dynamic loads has become necessary. Dynamic loads acting on a structure are more damaging than static loads, if they are not well considered and dimensioned. Dynamic loads could occur from earthquakes, wind, equipment, movement of people or vehicles, among other sources, which cause vibrations in structures and may lead to a collapse. Tuned mass damper (TMD), a passive control device, can be installed as an alternative to reduce vibration amplitudes. TMD has several advantages, such as large capacity to reduce amplitude of vibration, easy installation, low maintenance, low cost, among others. Optimizing TMD parameters is fundamental for obtaining best cost-benefit relation, i.e., greater amplitude reduction along with lower number of dampers or lower mass. In this context, this study aims at proposing, through numerical simulation, a method for optimizing TMD parameters when installing them on buildings under seismic excitation. Initially, a single-TMD case is considered, then simulations with multiple-TMDs (MTMDs) are run; lastly, unnecessary TMDs are discarded, obtaining the best structural response. For this purpose, a computational routine is developed on MatLab using Newmark direct integration method for equations of motion to determine the dynamic structural response. Both real and artificial earthquakes are considered for purposes of analysis. Artificial accelerograms are generated from proposed Kanai-Tajimi spectrum. First, structure is analyzed only with its own damping for comparison and reference. Second, a single or multiple-TMD optimization is carried out, in which the objective function is to minimize the maximum displacement at the top of the building, and the design variables are modal mass ratio (Structure-TMD), stiffness and damping of a single or multiple-TMD. Firefly and Backtracking Optimization algorithms are used for optimization. According to TMD settings, new dynamic structural responses are determined after optimizing parameters. Finally, the proposed method could optimize parameters of single or multiple-TMDs, considerably reducing structural responses after their installation, minimizing the risk of damage and building collapse. Thus, this study shows the possibility of designing TMDs or MTMDs both economically and effectively.

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Tang, Ning. "Design of adjustable tuned mass dampers employing nonlinear elements." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/19727/.

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The work focuses on the design of the Tuned Mass Damper (TMD), targeted multi-mode, multi-directional vibrations of mechanical structures occurring over a wide temperature ranges. Extension of the target frequency range is achieved by making the devices adjustable, using components with nonlinear load-deflection behaviour. Two nonlinear components that are new in TMD design are studied, namely elastomeric O-rings and Tangled Metal Wire (TMW) particles. Evaluation of the performance of these devices on a typical engineering structure is carried out, and the feasibility of the proposed devices demonstrated. For the O-ring TMD, analytical models are developed to describe the load- deflection behaviour of the O-ring. An existing model for axial compression is improved while new models are established for shear and rocking deformations. Validation of the models is carried out using a specifically designed vibration test. Numerical models, aiming to estimate the elasticity of the O-rings with irregular cross-sectional shape, are developed and validated by comparison with the experimental results. The TMW particles seeks to address high temperature applications. The strong compression-dependent stiffness of these particles provides the basis for an adjustable TMD. Although there is some variation in the stiffness and damping for different collections of particles with similar physical properties, uniformity in- creases after several test runs. According to the assumptions of the equivalence of the TMW materials and the hyperelastic solid, a semi-empirical analytical model is developed and validated using experimental results. A novel design optimisation algorithm, based on the complex power approach, developed to provide an alternative route for the TMD involving nonlinear elements. The proposed route, involving the use of the a numerical, evolutionary search method, is finally applied to the design of a nonlinear TMD.

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Alhujaili, Fahad Abdulrahman. "Semi-Active Control of Air-Suspended Tuned Mass Dampers." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354480214.

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Ritchey, John Kenneth. "Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35287.

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<p> The purpose of this 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 lighter; the advent of computers has resulted in "paperless" offices; and the use of floors for rhythmic activities, such as aerobics and concerts, is more common. Analytical and experimental studies were conducted to provide an understanding of the effects of incorporating the semi-active-TMD as a remedy to annoying floor vibration.</p><p> A pendulum tuned mass damper (PTMD) in which the tuning parameters could independently be varied was used. Closed form solutions for the response of the floor using passive dampers were developed. In addition, a numerical integration technique was used to solve the equations of motion where semi-active dampers are utilized. The optimum design parameters of PTMDs using passive and semi-active dampers were found using an optimization routine. Performances of the PTMD in reducing the floor vibration level at the optimum and when subjected to off-tuning of design parameters using passive and semi-active dampers were compared. </p><p> To validate the results obtained in the analytical investigation, an experimental study was conducted using an 8 ft x 30 ft laboratory floor and a commercial PTMD. Comparative studies of the effectiveness of the PTMD in reducing floor vibrations using semi-active and passive dampers were conducted.</p><br>Master of Science

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Almeida, Guilherme Mesquita de. "Aplicação de tuned-mass dampers para controle de vibrações em lajes." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-02122016-085411/.

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Esta dissertação propõe uma solução padronizada de aplicação de Tuned-Mass Damper (TMD) para controle de vibrações em lajes baseada na análise das características de carregamentos associados à utilização humana e nas características estruturais mais comuns à engenharia contemporânea. De modo a simplificar sua aplicação técnica, a sintonização é proposta por meio da escolha de componentes pré-determinados para a montagem do TMD e pela distribuição e posicionamento dos mecanismos. A eficácia do sistema é então verificada em um estudo de caso, usando um modelo de elementos finitos de uma laje, antes e depois da aplicação dos mecanismos.<br>This thesis proposes a standardized solution for the application of Tuned-Mass Dampers to the control of floor vibrations based on the characteristics of the acting loads associated to human usage and the characteristics of the most common structures of the contemporary engineering practice. In order to simplify its usage by the technical community, the tuning is proposed through the selection of pre-determined components for the assembly of the TMD and the choice of disposition and spacing of the mechanisms. The system efficacy is then verified in a computational case study, by means of a finite-element model of a floor, before and after the application of the mechanisms.

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Rottmann, Cheryl E. "The use of tuned mass dampers to control annoying floor vibrations." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063455/.

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Liedes, T. (Toni). "Improving the performance of the semi-active tuned mass damper." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514291258.

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Abstract The tuned mass damper (TMD) is a well-known and approved concept for resonance vibration control. However, as a fully passive device, the traditional TMD has a limited operating band and rather poor robustness against parameter variations. To overcome these weaknesses, a semi-active control can be applied to TMD. As a result, a more effective and flexible device can be attained. In theory, the application of the semi-active scheme is straightforward and the gain in performance is considerable. In practice, however, the non-idealities associated with actuators and control systems degrade the performance. In this thesis, the dynamic behaviour of a semi-active TMD with groundhook control was studied both numerically and experimentally. The semi-active scheme studied is based on groundhook control and a dry-friction damper is used as an actuator in rapid damping modulation. The performance of the semi-active TMD was evaluated in terms of two performance indices which are calculated from the normalised displacement response in the frequency domain. Also, parametric studies were conducted to find out how the different parameters influence the system performance. It is shown that the non-idealities in the semi-active damper have a significant influence on the performance of a groundhook controlled semi-active TMD. On the basis of simulations, a new parameterised semi-active control method was developed. The method is treated as a generalised groundhook control, and it involves a parameter through which the dynamic behaviour of a semi-active TMD can be affected both online and offline. The new method does not require an actuator model. The method developed opens the way for effective use of a non-ideal semi-active actuator, thus ensuring the good performance of the semi-active TMD. Also, the semi-active TMD’s sensitivity for certain parameter variation decreases considerably.

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Lindh, Cory W. "Dynamic range implications for the effectiveness of semi-active tuned mass dampers." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57884.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 159-164).<br>The response of tall buildings subjected to dynamic wind loads has been widely studied. For excitations approaching the resonant frequencies of the structure, ensuring serviceability is a significant concern. One 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 to improve the effectiveness of the TMD concept, but these systems require significant power and bring the inherent risk of instability. Hybrid semi-active schemes with variable damping devices have been proposed. They are stable, require low power, and are controllable, thus providing a broader range of applicability. The concept of a semi-active tuned mass damper (STMD) has been investigated, but the influence of the dynamic range of the semi-active damping device has not been documented. This analysis assesses the effectiveness of STMD systems using a variable-orifice damper and a magnetorheological damper with varying dynamic ranges. Results demonstrate a performance dependence on the dynamic range and also elucidate the superiority of non-linear damping devices. It is shown that the prescribed TMD mass may be reduced by a factor of two when semi-active control is implemented, thereby making the STMD an attractive and feasible option when space and weight concerns govern design.<br>by Cory W. Lindh.<br>S.M.

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Verdirame, Justin Matthew 1978. "Design of multi-degree-of-freedom tuned-mass dampers using perturbation techniques." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89918.

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Books on the topic "Multiple tuned mass dampers"

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Bekdaş, Gebrail, and Sinan Melih Nigdeli, eds. Optimization of Tuned Mass Dampers. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98343-7.

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Radmard Rahmani, Hamid. Seismic Control of Structures Using Tuned Mass Dampers. Springer Nature Switzerland, 2025. http://dx.doi.org/10.1007/978-3-031-71217-3.

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Wielgos, Piotr. Ocena skuteczności działania wielokrotnych, strojonych tłumików masowych w konstrukcjach budowlanych. Politechnika Lubelska, 2011.

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Gebrail Bekdaş and Sinan Melih Nigdeli. Optimization of Tuned Mass Dampers: Using Active and Passive Control. Springer International Publishing AG, 2022.

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Optimization of Tuned Mass Dampers: Using Active and Passive Control. Springer International Publishing AG, 2023.

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Book chapters on the topic "Multiple tuned mass dampers"

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Kahya, V., and O. Araz. "Series multiple tuned mass dampers for vibration control of high-speed railway bridges." In Insights and Innovations in Structural Engineering, Mechanics and Computation. CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-25.

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Daniel, Yael, and Oren Lavan. "Allocation and Sizing of Multiple Tuned Mass Dampers for Seismic Control of Irregular Structures." In Seismic Behaviour and Design of Irregular and Complex Civil Structures. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5377-8_22.

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Wang, X. C., Y. F. Duan, C. B. Yun, and W. J. Lou. "Multiple Tuned Mass Dampers for Wind Induced Vibration Control of a Cable-Supported Roof." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_6.

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Setareh, Mehdi. "An Economical Multiple-Tuned Mass Damper to Control Floor Vibrations." In Lecture Notes in Civil Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93236-7_24.

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Lavan, Oren, and Yael Daniel. "Seismic Design Methodology for Control of 3D Buildings by Means of Multiple Tuned-Mass-Dampers." In Computational Methods in Applied Sciences. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6573-3_21.

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Jaboviste, Kévin, Emeline Sadoulet-Reboul, Olivier Sauvage, and Gaël Chevallier. "A Framework for the Design of Rotating Multiple Tuned Mass Damper." In Topics in Modal Analysis & Testing, Volume 8. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47717-2_40.

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Nguyen, Trong Phuoc, and Duy Thoai Vo. "The Reduction of Vibration of Multiple Tuned Mass Dampers in Continuous Beam Traversed by Moving Loads." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5144-4_119.

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Daniel, Yael, and Oren Lavan. "Optimal Drift and Acceleration Control of 3D Irregular Buildings by Means of Multiple Tuned Mass Dampers." In Seismic Behaviour and Design of Irregular and Complex Civil Structures II. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14246-3_28.

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Bhowmik, Kamalesh, and Nirmalendu Debnath. "Stochastic Structural Optimization of Multiple Tuned Mass Damper (MTMD) System with Uncertain Bounded Parameters." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5235-9_28.

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Cimellaro, Gian Paolo, and Sebastiano Marasco. "Tuned-Mass Dampers." In Introduction to Dynamics of Structures and Earthquake Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72541-3_18.

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Conference papers on the topic "Multiple tuned mass dampers"

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Ali, Amir R., Alaa Farahat, Aly Fahmy, et al. "Analyzing Tuned Mass Dampers for Controlling Building Vibrations Based on Bond-Graph Approach." In 2024 International Telecommunications Conference (ITC-Egypt). IEEE, 2024. http://dx.doi.org/10.1109/itc-egypt61547.2024.10620486.

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Zuo, Lei. "Characteristics and Optimization of Series Multiple Tuned-Mass Dampers." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35810.

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Tuned-mass damper (TMD), or dynamic vibration absorber (DVA), is a very practical and effective device for vibration suppression. Various types of tuned-mass dampers have been proposed in literature, including the classic TMD, (parallel) multiple TMDs, multi-degree-of-freedom (DOF) TMD, and three-element TMD. In this paper we study the characteristics and optimization of a new type of TMD system, in which multiple absorbers are connected to the primary system in series. Structured H2 and H∞ control methods are adopted to optimize the parameters of spring stiffness and damping coefficients for random and harmonic vibration. It is found that series multiple TMDs are more effective and robust than all the other types of TMDs of the same mass ratio. The series two TMDs of total mass ratio 5% can appear to have 31%–66% more mass than the classical TMD, and it can perform better than parallel ten TMDs of the same total mass ratio. The series TMDs are also less sensitive to the parameter changes of the primary system than other TMD(s). Unlike the parallel multiple TMDs, the optimal mass distribution among absorbers in series TMDs is far from the case of equal masses, but instead the first absorber mass is much larger than the second one. Similar to the two-DOF TMD, the optimal series two TMDs also have zero damping in one of its two connections and further increased effectiveness can be obtained if negative dashpot is allowed.

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Wu, J., and G. Chen. "Optimization of multiple tuned mass dampers for seismic response reduction." In Proceedings of 2000 American Control Conference (ACC 2000). IEEE, 2000. http://dx.doi.org/10.1109/acc.2000.878954.

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King, Melvin E., and Guido Sandri. "Dynamics of Distributed Impact Dampers." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-3922.

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Abstract In this work, the dynamics of spatially distributed impact dampers are investigated. Typical impact damper configurations consist of a single, rigid mass which moves freely within a cavity that is attached to a lightly damped structure. By tuning the damper’s mass and the cavity’s length (gap-size), the maximum displacement of the structure may be significantly reduced due to the resulting intermittent collisions. Several modifications to the classical impact damper design have been considered in the literature, including (i) multiple-unit dampers, and (ii) granular impact dampers. Both designs have been found to effectively attenuate resonant responses, while simultaneously reducing the severe impact loads, accelerations and noise levels associated with a single-unit damper. An extension of the multiple-unit damper configuration is considered in the present work. The configuration under consideration (referred to as a distributed impact damper) incorporates a number of non-identical single-unit dampers. Whereas multiple-unit dampers composed of identical elements may be tuned to a specified resonant frequency, the proposed distributed impact damper is expected to provide significant attenuation over broad frequency bands. The present work focuses on developing analytical tools with which to study the dynamics of distributed impact dampers. In this regard, methods from non-equilibrium statistical mechanics, including correlation hierarchy, will be used to develop statistical models of the distributed impact damper. Successful completion of this work is expected to provide significant insight into the dynamics of distributed impact dampers, leading to the future development of novel broad-band damping and shock isolation designs.

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Yang, Fan, Ramin Sedaghati, and Ebrahim Esmailzadeh. "Optimal Vibration Control of Flexible Structures Using Multiple Tuned Mass Dampers." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-13006.

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The structural vibration suppression of beam-type structures using Tuned Mass Damper (TMD) and Multiple Tuned Mass Dampers (MTMD) technologies will be investigated in this study. A vibration suppression strategy for beam-type structures based on TMD and MTMD technologies, in which a light beam with attached masses (secondary structure) is connected to the primary structure (beam), will be presented. The beam is modeled by utilizing the Timoshenko beam theory, and then the governing differential equations of motion have been cast into the finite element form by using the Galerkin method. The derived finite element formulation of beam-type structures with the attached TMD and MTMD systems has been combined with a designed optimization procedure to find the optimum design variables in the developed TMD and MTMD systems to suppress the vibration effectively. The effectiveness of the developed methodologies is verified through an experimental study, where the structural responses for the uncontrolled structure and that with the attached optimal TMD and MTMD systems were compared.

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Tsai, Chong-Shien, and Hui-Chen Chen. "Effects of Soil-Structure Interaction on the Response of a Structure With Tuned Mass Dampers." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45112.

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This paper aims at examining the effects of soil-structure interaction (SSI) on the response of a structure which is equipped with multiple tuned mass dampers (MTMD) and founded on multiple soil layers overlying bedrock. Closed-form solutions have been obtained for the entire system, which consists of a shear beam type superstructure, multiple tuned mass dampers, and multiple soil layers overlying bedrock, while subjected to ground motion. The proposed formulations simplify the problem in terms of well-known frequency ratios, mechanical impedance and mass ratio, which can take into account the effects of SSI, mass ratio of the MTMD at each excitation frequency and damping ratio in the entire system. These formulations are capable of explicitly interpreting the major dynamic behavior of a structure equipped with multiple tuned mass dampers and interacting with the multiple soil layers overlying bed rock. The SSI effects on the dynamic response of a tuned-mass-damped structure as a result of multiple soil layers overlying bedrock were extensively investigated through a series of parametric studies.

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Mantovani, Giancarlo, Leandro Fadel Miguel, Rafael Holdorf Lopez, Letícia Miguel, and André Torii. "OPTIMUM DESIGN OF MULTIPLE FRICTION TUNED MASS DAMPERS UNDER SEISMIC EXCITATIONS." In 6th International Symposium on Solid Mechanics. ABCM, 2017. http://dx.doi.org/10.26678/abcm.mecsol2017.msl17-0024.

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Lin, Ging-Long, Chi-Chang Lin, and Jer-Fu Wang. "Protection of Seismic Structures Using Passive and Semi-Active Friction Typed Multiple Tuned Mass Dampers." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77906.

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Although the design and applications of linear tuned mass damper (TMD) systems are well developed, nonlinear TMD systems are still developing. In this paper, the application of multiple semi-active friction tuned mass dampers (SAF-MTMD) for response control of a multistory structure under seismic excitation is investigated. The friction forces of the SAF-MTMD are controllable. A non-sticking friction (NSF) controller, which is able to keep each of the TMD activated and in its slip state throughout an earthquake with arbitrary intensity, was conducted. A parametric study is performed to investigate the effectiveness of SAF-MTMD. The seismic performance of the SAF-MTMD is also compared with the single and multiple passive friction tuned mass dampers (PF-TMD/PF-MTMD). The numerical result shows that the SAF-MTMD is superior to PF-MTMD in reducing the response of the primary structure under the seismic excitation.

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SUN, KYOUNG. "Structural Performance of Vertically Distributed Multiple Tuned Mass Dampers in Tall Buildings." In Seventh International Conference on Advances in Civil, Structural and Mechanical Engineering - ACSM 2017. Institute of Research Engineers and Doctors, 2017. http://dx.doi.org/10.15224/978-1-63248-135-1-38.

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Ekici, Yigitcan, and Ender Cigeroglu. "Effect of Nonlinearities on the Vibration Reduction Performance of a System With Multiple Nonlinear Tuned Mass Dampers." In ASME 2023 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/imece2023-113634.

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Abstract In this study, a single-degree-of-freedom structure with multiple nonlinear tuned mass dampers is investigated. A sinusoidal excitation is assumed to be applied to the structure. In order to obtain the results, a nonlinear mathematical model of the general system is obtained in the form of a set of nonlinear ordinary differential equations. Dry friction and cubic stiffness nonlinearities are considered for the nonlinear terms. To obtain steady-state frequency responses of the system, these nonlinear ordinary differential equations are transformed into a set of nonlinear algebraic equations by using Harmonic Balance Method. Fourier transformation is used in the calculation of the Fourier coefficients of the nonlinear forcing terms. Then, numerical solutions to the resulting nonlinear algebraic equations are obtained using Newton’s Method with Arc Length Continuation. The effect of the number of tuned mass dampers and their arrangement, i.e. in series or in parallel, on vibration reduction is observed by performing optimization on several cases and comparing them. In order to observe the separate and combined effects of the nonlinearities, and the number of tuned mass dampers used, several case studies are carried out using optimized case parameters with different combinations of the nonlinearities. The results of these case studies and the linear model are compared with each other to see the effect of the nonlinearities. Additionally, results of the system with optimum nonlinear tuned mass dampers are compared with that of the optimum linear tuned mass dampers and the effect of nonlinearities are discussed.

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Reports on the topic "Multiple tuned mass dampers"

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Sadek, Fahim, Bijan Mohraz, and H. S. Lew. Single and multiple tuned liquid column dampers for seismic applications. National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5920.

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Sadek, Fahim, Bijan Mohraz, Andrew W. Taylor, and Riley M. Chung. A method of estimating the parameters of tuned mass dampers for seismic application. National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5806.

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