Optimum tuned mass damper design in frequency domain for structures

Niğdeli, Sinan Melih; Bekdaş, Gebrai̇l

doi:10.1007/s12205-016-0829-2

Cited by 77 publications

(30 citation statements)

References 32 publications

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“…The process is unconstrained except that the lower and upper bound vectors of the two parameters r ୟ and ζ ୟ are also taken into account. To optimize the DVA, every researcher considers a range of these bounds [23,24]. In this manuscript, the range for frequency ratio and damping factor of DVA (in MATLAB vector notation) has been chosen as lb = ‫;5.0ہ‬ ‫ۂ100.0‬ and ub = ‫;5.1ہ‬ ‫ۂ1‬ , which provide quite wide intervals for the optimization process.…”

Section: Numerical Optimization Of the Design Parametersmentioning

confidence: 99%

“…The optimum design parameters of DVA such as the damping factor and frequency ratio are determined with a Mini-max numerical optimization. The results for the undamped main system are compared with those studied by Matshuhisa [22,23]. The effect of the structure damping, mass ratio, relative position and number of DVA masses on the design parameters and the maximum system response were studied.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Design of Dynamic Vibration Absorber for Rolling Systems

Younes

2018

The International Conference on Applied Mechanics and Mechanica

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This work deals with the reduction of vibration levels for rolling systems such as ropeway gondola, cranes and ships using a dynamic vibration absorber (DVA). The optimum values of the DVA damping factor and the spring constant are determined numerically through minimizing a maximum response of the main system. Single DVA (SDVA) and multi-masses DVA (MDVA) in parallel configurations are examined. A Mini-max criterion optimization method is utilized to calculate the optimum design parameters of the DVA for many numbers of DVA masses with a constant total mass. The results obtained that the rising of the mass ratio leads to decrease the vibration levels. Using the MDVA leads to enhanced robustness and vibration attenuation in the main system at the expense of growing the vibration in the absorber. MDVA compared with SDVA have some advantages such as lower frequency ratios and low fatigue.

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Section: Numerical Optimization Of the Design Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Design of Dynamic Vibration Absorber for Rolling Systems

Younes

2018

The International Conference on Applied Mechanics and Mechanica

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“…Although, a detailed description of the HS algorithm can be found in [30] and [35][36][37], the four basic steps of the algorithm are the following:…”

Section: Hs Algorithmmentioning

confidence: 99%

“…As far as structural problems are concerned, HS has been successfully applied to the optimum design of truss structures [32], steel sway frames [33] and grillage systems [34]. Recently, HS has been employed for the optimum design of the implementation of TMDs to multistory buildings [35,36].…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization of the Kdamper Concept in Seismic Isolation of Bridges Using Harmony Search Algorithm

Syrimi¹,

Sapountzakis²,

Tsiatas³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…By using population‐based algorithm called particle swarm optimization, Leung and Zhang provided closed‐form TMD tuning formulations. The music inspired metaheuristic algorithm called harmony search (HS) employed in many TMD optimization stories to investigate optimum values in time domain, mass ratio factor, preventing brittle fracture, preventing pounding of adjacent structures, optimum values in frequency domain, optimum values considering soil‐structure interaction (SSI), and optimum TMD design for high‐rise intake towers . Keshtegar and Etedali proposed an adaptive dynamic HS algorithm for TMD optimization using a nonlinear mathematical model.…”

Section: Introductionmentioning

confidence: 99%

Optimum design of multiple positioned tuned mass dampers for structures constrained with axial force capacity

Niğdeli

Bekdaş

2019

Structural Design Tall Build

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The stories of structure may have different and limited axial force capacity. In order to passively control the translational movement of structures, a tuned mass damper (TMD) positioned on a story may cause to exceed axial force capacity of a story.The optimum performance is achieved when all additional masses are positioned on the top story. Whereas, the top stories of structure may be constructed with lower axial force capacity than the lower stories. In that case, the maximum allowed TMD mass for upper stories may be low. In that situation, several TMDs may be positioned on several stories. In the current study, the optimum tuning of TMDs positioned on multiple stories of structure is investigated. By using small masses, it is also possible to obtain effective passive control with dampers that have small damping coefficients comparing with a single TMD on the top of the structure. The design variables of the optimization problem such as the period and damping ratio of TMD are tuned according to a metaheuristic algorithm called flower pollination algorithm. The TMD is optimized for near-fault excitations by using impulsive motions during the optimization process. The proposal was applied to four case studies. According to the results, the multiple positioned TMDs may be a practical and effective option comparing with the use of a single heavy TMDs on the top of a structure. KEYWORDS axial force, flower pollination algorithm, impulsive motions, optimization, optimum tuning, tuned mass dampers | INTRODUCTIONIn order to reduce structural vibrations originating from seismic sources, tuned mass dampers (TMDs) can be used, but the mass of the TMD must be too big to provide an effective performance on the lateral responses of the structure. Although the responses are positively affected, the fracture or ductility limit (especially for reinforced concrete structures) of vertical structural members (columns) can be exceeded. In that situation, the structural capacity must be considered as the mass limit or the structure must be retrofitted for increasing the axial force capacity. In a civil structure, the forces of upper stories are directed to a lower story. In that case, the axial force is the maximum at the lowest story. For that reason, upper stories of civil structures may be constructed by smaller cross-sections and less reinforcements than the lower stories. In that case, the axial force capacity of upper stories may be less than the capacity of the lower stories. Generally, the optimum position of a TMD is the top of the building where the first mode shape value is the maximum for the critical mode of the structure. In that case, the number of TMDs can be increased and small TMDs can be placed on multiple stories.The most important performance index of TMDs is the optimum tuning. By using multiple TMDs on different stories, it will be a more challenging optimization problem. For this problem, to use a well-known optimum frequency and damping ratio formulation will not be effective because these formulations wer...

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Optimum tuned mass damper design in frequency domain for structures

Cited by 77 publications

References 32 publications

Optimal Design of Dynamic Vibration Absorber for Rolling Systems

Optimal Design of Dynamic Vibration Absorber for Rolling Systems

Parameter Optimization of the Kdamper Concept in Seismic Isolation of Bridges Using Harmony Search Algorithm

Optimum design of multiple positioned tuned mass dampers for structures constrained with axial force capacity

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