Optimal design of a tuned liquid damper using a magnetic fluid with one electromagnet

Ohno, Ken; Shimoda, Manabu; Sawada, Tatsuo

doi:10.1088/0953-8984/20/20/204146

Cited by 20 publications

(21 citation statements)

References 6 publications

(9 reference statements)

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“…The TMFD has a characteristic that a magnetic field varies the natural sloshing frequency. Thus the TMFD controls the effective damping frequency by the magnetic field [5]. The previous studies [5,6] show that the natural sloshing frequency is affected by the magnetic field of the vertical direction.…”

Section: Introductionmentioning

confidence: 86%

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Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Ohno

Suzuki

Sawada

2011

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 86%

“…The natural sloshing frequency of the coaxial cylindrical container is solved under the same assumptions in the previous studies [5,6]:…”

Section: Natural Sloshing Frequency Of the Previous Studymentioning

confidence: 99%

Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Ohno

Suzuki

Sawada

2011

Journal of Magnetism and Magnetic Materials

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“…To improve the performance of TLD, Abe et al [53] employed ferrofluid as the working fluid in 1998. Further studies were conducted by Sawada et al [54][55][56][57][58] from Japan. Figure 19 illustrates an active absorber, and it was actually called an active tuned liquid damper in which ferrofluid activated by electromagnets was used to improve its performance.…”

Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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Ferrofluids are a special category of smart nanomaterials which shows normal liquid behavior coupled with superparamagnetic properties. One of the earliest and most prospective applications of ferrofluids is in damping, which has prominent advantages compared with conventional damping devices: simplicity, flexibility and reliability. This paper presents the basic principles that play a major role in the design of ferrofluid damping devices. The characteristics of typical ferrofluid damping devices including dampers, vibration isolators, and dynamic vibration absorbers are compared and summarized, and then recent progress of vibration energy harvesters based on ferrofluid is briefly described. Additionally, we proposed a novel ferrofluid dynamic vibration absorber in this paper, and its damping efficiency was verified with experiments. In the end, the critical problems and research directions of the ferrofluid damping technology in the future are raised.

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“…This MF dynamic absorber had a great significance to the development of MF inertia dampers, which improved the sensitivity by not filling MFs. At the beginning of the 21 st century, scholars replaced other liquids in tuned liquid dampers with MFs, on account of their controllable flow, to enhance the energy consumption efficiency of tuned MF dampers [8][9][10]. As energy issues attract more and more attention, the combination of MF dampers and energy harvesters has made a remarkable progress in the past decade [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Hexagonal Structure Enhancing Damping Efficiency Inspired by Tree Frogs

2022

Preprint

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Magnetic fluid shock absorbers (MFSAs) have been successfully applied in eliminating the micro-vibration of the spacecraft’s flexible structures. The method of enhancing the damping of MFSAs has always been the key issue. The tree frog’s toe pads exhibit the strong adhesion, which inspired us to learn from their surface structure. We got hundreds of scanning electron microscope images of the tree frog’s toe pads surface and used the edge extraction algorithm to obtain the result that the geometric shape with the largest proportion in these images is hexagon. According to this result, hexagonal surface textures were added to the inner surface of the MFSA and a small part of the MFSA was taken for further simulation analysis. The flow distribution of the magnetic fluid (MF) acquired from the simulation clearly illustrates that the surface textures cause vortexes formation in the MF layer. These vortexes increase the shear rate between the MF layers, thereby augmenting the flow resistance. The vibration reduction experiments were carried out and MFSAs employed in these experiments were fabricated by 3D printing technology. Consequently, the bionic textures mimicking the tree frog’s toe pads surface can significantly improve the damping performance of MFSAs.

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Optimal design of a tuned liquid damper using a magnetic fluid with one electromagnet

Cited by 20 publications

References 6 publications

Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Damping Applications of Ferrofluids: A Review

Hexagonal Structure Enhancing Damping Efficiency Inspired by Tree Frogs

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