A Novel Hybrid Semi-Active Mass Damper Configuration for Structural Applications

Demetris Demetriou,Nikolaos Nikitas

doi:10.3390/app6120397

Abstract

In this paper, a novel energy- and cost-efficient hybrid semi-active mass damper configuration for use in structural applications has been developed. For this task, an arrangement of both active and semi-active control components coupled with appropriate control algorithms are constructed and their performance is evaluated on both single and multi-degree of freedom structures for which practical constraints such as stroke and force saturation limits are taken into account. It is shown that under both free and forced vibrations, the novel device configuration outperforms its more conventional passive and semi-active counterparts, while at the same time achieving performance gains similar to the active configuration at considerably less energy and actuation demands, satisfying both strict serviceability and sustainability requirements often found to govern most modern structural applications.

Highlights

Alleviating the vibration response of tall and slender structures under wind action becomes an increasingly challenging task
Four structural configurations consisting of passive, semi-active, hybrid active and semi-active hybrid control devices were considered for investigating the efficacy of the semi-active hybrid mass damper (SHMD) device for the vibration control of high-rise structures
The results indicate that, for approximately the same damper strokes, the SHMD‐equipped structure is indicate able to achieve performance the active-tuned mass damper (ATMD)‐equipped while clearly

Summary

Introduction

Alleviating the vibration response of tall and slender structures under wind action becomes an increasingly challenging task. The passive form of the DVA, the tuned mass damper (TMD), has been studied for more than a century and is shown to be effective and reliable at alleviating structural response under generic dynamic loading; this device being tuned to a single vibration mode of the structure has performance limited to a narrow band of operating frequencies that in turn compromise the system’s attenuation capacity when excited beyond the targeted mode. Overcoming the limitations of the passive TMD, the active version of the DVA, the active mass damper (AMD), achieves resonant response reduction by generating control forces via acceleration and deceleration of auxiliary masses using actuators in a way that at any given time and independent of the excitation and system’s characteristics, maximum energy is absorbed. While the flexibility and adaptability of active devices allows for better vibration response reduction, this performance enhancement is achieved at the expense of considerable power-force demands and

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Conclusion