Tuned mass dampers in wind response control of wind turbine with soil-structure interaction

Gaur, Shashwat; Elias, Said; Höbbel, Thomas; Matsagar, Vasant; Thiele, Klaus

doi:10.1016/j.soildyn.2020.106071

Cited by 46 publications

(20 citation statements)

References 24 publications

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“…To this end, supplemental damping devices and passive vibration absorbers are commonly employed to safeguard the resilience of flexible cantilevered structures to wind and seismic loads 3 . In this context, the tuned mass damper (TMD) has been widely used in practice for lateral vibrations suppression of flexible cantilevered structures including tall buildings, 4,5 industrial chimneys, 6 and solar towers, 7 as well as heavily investigated for motion control of wind turbine towers 8,9 . The typical TMD consists of a free‐to‐oscillate secondary mass attached to the top of the cantilevered structure via linear stiffeners/springs and viscous damper (dashpot) elements 10 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced motion control performance of the tuned mass damper inerter through primary structure shaping

Wang

Giaralis

2021

Struct Control Health Monit

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Summary The tuned mass damper inerter (TMDI) is a linear passive dynamic vibration absorber widely considered in the literature to mitigate the motion of dynamically excited primary structures. Previous studies focused on optimal TMDI tuning approaches and connectivity arrangements to improve motion control efficiency for some given primary structure. This paper investigates the influence of the elastic and mass properties of the primary structure to the TMDI motion control performance. This is pursued through an innovative parametric study involving a wide range of tapered beam‐like cantilevered primary structures with different continuously varying flexural rigidity and mass distributions equipped with TMDIs optimally tuned for resonant harmonic and for white noise excitations. Optimal TMDI tuning and performance assessment are expedited through a novel simplified two‐degree‐of‐freedom dynamic model, which accounts for the properties of the primary structure. It is found that reduced free‐end displacement and TMDI stroke are achieved for primary structures in which the ratio of flexural rigidity over mass decreases faster with height resulting in vibration modal shapes with higher convexity. The latter is quantified though the average modal curvature shown to be well correlated with TMDI motion control improvement. It is concluded that judicial shaping of the primary structure extends the applicability of the TMDI to structures where connecting the inerter away from the free end is practically challenging while contains the magnitude of the inerter and damping forces exerted to the primary structure. Therefore, this study paves the way towards combining optimal TMDI tuning with primary structure design for improved performance to dynamic loads.

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Section: Introductionmentioning

confidence: 99%

Enhanced motion control performance of the tuned mass damper inerter through primary structure shaping

Wang

Giaralis

2021

Struct Control Health Monit

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“…A tuned mass damper (TMD) is a dynamical device (it consists of a mass, a spring, and a damper) that is attached to a structure in order to reduce the dynamic response of a structure [35][36][37][38][39]. e mass and the stiffness of the TMD are tuned to the natural frequency that needs to be damped, typically the first mode.…”

Section: Tuned Mass Dampers (Tmds)mentioning

confidence: 99%

Corrigendum to “Modal Mass and Length of Mode Shapes in Structural Dynamics”

Aenlle

Juul

Brincker

2021

Shock and Vibration

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The literature about the mass associated with a certain mode, usually denoted as the modal mass, is sparse. Moreover, the units of the modal mass depend on the technique used to normalize the mode shapes, and its magnitude depends on the number of degrees of freedom (DOFs) used to discretize the model. This has led to a situation where the meaning of the modal mass and the length of the associated mode shape is not well understood. As a result, normally, both the modal mass and the length measure have no meaning as individual quantities, but only when they are combined in the frequency response function. In this paper, the problems of defining the modal mass and mode shape length are discussed, and solutions are found to define the quantities in such a way that they have individual physical meaning and can be estimated in an objective way.

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“…A TMD is a substructure that serves as a vibration absorber for the main structure [50][51][52][53][54]. A TMD device consisting of a spring (with stiffness k), a mass (m) and a damper (coefficient c) is attached to a structure having stiffness (K), a mass (M) and a damping (C) to mitigate undesirable vibrations.…”

Section: Mathematical Modeling Of the Tmd Systemmentioning

confidence: 99%

Seismic Vulnerability of Cabinet Facility with Tuned Mass Dampers Subjected to High- and Low-Frequency Earthquakes

et al. 2020

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The study investigates the collapse probability of a cabinet facility with a tuned mass damper (TMD) subjected to high- and low-frequency earthquakes. For this aim, a prototype of the cabinet in Korea is utilized for the numeric simulation. The accuracy of the finite element model is evaluated via the impact hammer tests. To mitigate the seismic response of the structure, a TMD system is developed whose properties are designed based on the outcomes from the modal analysis (i.e., modal frequencies and mode shapes). Furthermore, the influences of earthquake frequency contents on the seismic response are evaluated. The numeric analyses are conducted using a series of eighty earthquakes that are classified into two groups corresponding to low- and high-frequency motions. Finally, fragility curves are developed for the cabinet subjected to different ground motion sets. The results quantify the seismic vulnerability of the structure and demonstrate the influences of earthquake frequency contents and the vibration control system on the seismic response of the cabinet.

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Tuned mass dampers in wind response control of wind turbine with soil-structure interaction

Cited by 46 publications

References 24 publications

Enhanced motion control performance of the tuned mass damper inerter through primary structure shaping

Enhanced motion control performance of the tuned mass damper inerter through primary structure shaping

Corrigendum to “Modal Mass and Length of Mode Shapes in Structural Dynamics”

Seismic Vulnerability of Cabinet Facility with Tuned Mass Dampers Subjected to High- and Low-Frequency Earthquakes

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