Designing and testing a hydraulic inerter

Wang, Fu-Cheng; Hong, Min-Feng; Lin, Tai-Chia

doi:10.1243/09544062jmes2199

Cited by 195 publications

(99 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The constant of proportionality is termed “inertance” and is measured in mass units (kg). Notably, several different inerter prototypes were devised and experimentally tested over the past decade achieving inertance values orders of magnitude larger than the devices' physical mass, while observing a linear behavior within relatively wide frequency bands of practical interest . These devices are relatively small‐scale tailored for and used in vehicle suspension systems.…”

Section: Introductionmentioning

confidence: 99%

Optimal tuned mass-damper-inerter (TMDI) design for seismically excited MDOF structures with model uncertainties based on reliability criteria

Giaralis

Taflanidis

2017

Struct Control Health Monit

225

133

View full text Add to dashboard Cite

Summary The tuned mass‐damper‐inerter (TMDI) is a recently proposed linear passive dynamic vibration absorber for the seismic protection of buildings. It couples the classical tuned mass damper (TMD) with an inerter, a two‐terminal device resisting the relative acceleration of its terminals, in judicial topologies, achieving mass‐amplification and higher‐modes‐damping effects compared to the TMD. This paper considers an optimum TMDI design framework accommodating the above effects while accounting for parametric uncertainty to the host structure properties, modeled as a linear multi degree of freedom system, and to the seismic excitation, modeled as stationary colored noise. The inerter device constant, acting as a TMD mass amplifier, is treated as a design variable, whereas performance variables sensitive to high‐frequency structural response dynamics are used to account for the TMDI influence to the higher structural modes. Reliability criteria are adopted for quantifying the structural performance, expressed through the probability of occurrence of different failure modes related to the trespassing of acceptable thresholds for the adopted performance variables: floor accelerations, interstory drifts, and attached mass displacement. The design objective function is taken as a linear combination of these probabilities following current performance‐based seismic design trends. Analytical and simulation‐based tools are adopted for the efficient estimation of the underlying stochastic integral defining the structural performance under uncertainty. A 10‐story building under stationary Kanai‐Tajimi stochastic excitation is considered to illustrate the design framework for various TMDI topologies and attached mass values. It is shown that the TMDI achieves enhanced structural performance and robustness to building and excitation uncertainties compared to same mass/weight TMDs.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimal tuned mass-damper-inerter (TMDI) design for seismically excited MDOF structures with model uncertainties based on reliability criteria

Giaralis

Taflanidis

2017

Struct Control Health Monit

225

133

View full text Add to dashboard Cite

show abstract

“…The constant of proportionality of the inerter is called the inertance, which has the dimension of mass. Inertance is typically generated from the rotation of a flywheel, and there are 3 main types of inerter devices: rack and pinion inerter devices, ball and screw inerter devices, and hydraulic inerter devices …”

Section: Introductionmentioning

confidence: 99%

Displacement reduction effect and simplified evaluation method for SDOF systems using a clutching inerter damper

Wang

Sun

2018

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Summary This study evaluates the response reduction effect of linear single degree of freedom systems with a clutching inerter damper (CID) via parametric analysis under harmonic excitations and real earthquake records. The cause of the displacement reduction effect of a CID is inherited from the inertial mass damper (IMD)—reducing the nominal load intensity by increasing the mass by inertance. Additionally, the displacement reduction effect is further enhanced by the clutching effect, which speeds up the decreasing of the velocity response from an instantaneous extremum to 0. Thus, the CID is more effective than the IMD at reducing displacement responses. For example, the displacement response for a long‐period structure with a CID can be reduced by approximately 53%, while for an IMD, it can only be reduced by approximately 24%. Additionally, the linear single degree of freedom system with a CID is a weak nonlinear system reserving homogeneity, indicating that the response reduction factor will provide enough information to reveal the seismic reduction effect of the CID and that there is no need to consider the amplitude of the input excitations. To simplify the analysis of such nonlinear systems, an equivalent linearization method and a simplified formula of displacement reduction factors for code‐based designs are proposed and validated by another independent set of records from the European Strong‐motion Database.

show abstract

“…An appealing property of inerters is that they can be designed and realized in practice having their inertance significantly larger than their mass [1,2]. This opens many interesting possibilities so that many authors reported on how to design and use inerters to suppress mechanical vibrations [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Another type of mechatronic inerter utilizes a rotary DC motor shunted with an appropriate electrical circuit [4]. An inertance-like behaviour can also be accomplished through a scheme in which hydraulic fluid is accelerated [5,6] with a piston which pushes the fluid through a helical channel [6].…”

Section: Introductionmentioning

confidence: 99%

An inerter-based active vibration isolation system

et al. 2018

View full text Add to dashboard Cite

Abstract. This paper presents a theoretical study on passive and active vibration isolation schemes using inerter elements in a two degree of freedom (DOF) mechanical system. The aim of the work is to discuss basic capabilities and limitations of the vibration control systems at hand using simple and physically transparent models. Broad frequency band dynamic excitation of the source DOF is assumed. The purpose of the isolator system is to prevent vibration transmission to the receiving DOF. The frequency averaged kinetic energy of the receiving mass is used as the metric for vibration isolation quality. It is shown that the use of inerter in the passive and active vibration isolation schemes considered enhances the isolation effect.

show abstract

Designing and testing a hydraulic inerter

Cited by 195 publications

References 10 publications

Optimal tuned mass-damper-inerter (TMDI) design for seismically excited MDOF structures with model uncertainties based on reliability criteria

Optimal tuned mass-damper-inerter (TMDI) design for seismically excited MDOF structures with model uncertainties based on reliability criteria

Displacement reduction effect and simplified evaluation method for SDOF systems using a clutching inerter damper

An inerter-based active vibration isolation system

Contact Info

Product

Resources

About