Closed form optimal solution of a tuned liquid column damper for suppressing harmonic vibration of structures

Shum, K.M.

doi:10.1016/j.engstruct.2008.07.015

Cited by 75 publications

(39 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gao and Kwok [24] found that the increase of the cross section of horizontal tube might reduce the liquid column in a vertical tube and the optimal parameters could be obtained to reduce the amplification factor when the structure subjected to a harmonic vibration. A recent study by Shum [25] proposed the optimal parameters of a TLCD to suppress the vibration caused by harmonic excitations. In his paper, a closed form solution for the case of undamped primary structure was developed and numerical technique was used for the case of damped primary structure.…”

Section: Introductionmentioning

confidence: 99%

“…The optimum design parameters for LCD provided by Wu et al [26] are utilized in this comparison. In addition, other optimal design parameters which are taken from Shum [25] are used to evaluate the performance of the proposed system and to confirm its effectiveness. Excellent results are obtained using the proposed absorber with suppression magnitude exceeding 66% as opposed to the current optimum designs of the TLCD reported in the literature for harmonic excitations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modified liquid column damper for vibration control of structures

Alsaif

Al-Dakkan

Foda

2011

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modified liquid column damper for vibration control of structures

Alsaif

Al-Dakkan

Foda

2011

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

“…For the purpose of comparison, the basic properties of all TLCDs are kept same i.e., mass ratio, length ratio, frequency ratio and head loss coefficient. The mass ratio and length ratio are selected and the frequency ratio and head loss coefficient are obtained from the optimal parameters given by Shum [10]. The mass ratio, length ratio, frequency ratio and head loss coefficient considered for TLCDs are 0.01, 0.8, 0.99066 and 10, respectively.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Performance of Different Tuned Liquid Column Dampers (TLCDs)

Kalva

Ray-Chaudhuri

2014

Advances in Structural Engineering

View full text Add to dashboard Cite

Many of the modern slender and flexible structures are highly susceptible to wind-and earthquake-induced vibrations, which may result in damage to these structures. Of late tuned liquid column dampers (TLCD) has drawn significant attention of researchers. In TLCD, the motion of liquid column in a U-tube container counteracts the forces acting on the structure resulting in reduction of structural response. The advantages of TLCD include low cost and maintenance. There are many varieties of TLCDs proposed for vibration control. In this study, the efficiency in vibration suppression of four different types of passive TLCDs has been compared. These are U-shaped TLCD, liquid column vibration absorber (LCVA), V-shaped TLCD and tuned liquid column ball damper (TLCBD). For this purpose, the response of an SDOF system with and without TLCD is evaluated when subjected to harmonic excitation of varying frequencies and excitation levels. Transfer functions are evaluated for uncontrolled and controlled (i.e., with TLCD) cases by using an equivalent linearization approach for the non-linear TLCD damping. Further, a numerical method is also used for solving equations of motion involving non-linear damping of TLCDs. Results are presented in terms of percentage reduction in SDOF system response. The results of this work demonstrate that TLCBD has better performance when compared to other TLCDs.

show abstract

“…The fixed-points theory has also been used in deriving the optimum parameters of a tuned liquid column damper for suppressing harmonic vibration of structures [10]. A perturbation method is proposed by Asami et al [11] for deriving the H ∞ optimum parameters of a damped DVA applied to a damped SDOF primary system.…”

Section: Introductionmentioning

confidence: 99%

H-infinity optimization of a variant design of the dynamic vibration absorber—Revisited and new results

Cheung

Wong

2011

Journal of Sound and Vibration

View full text Add to dashboard Cite

The H ∞ optimum parameters of a dynamic vibration absorber (DVA) with ground-support are derived to minimize the resonant vibration amplitude of a single degree-of-freedom (SDOF) system under harmonic force excitation. The optimum parameters which are derived based on the classical fixed-points theory and reported in literature for this non-traditional DVA are shown to be not leading to the minimum resonant vibration amplitude of the controlled mass. A new procedure is proposed for the H ∞ optimization of such a dynamic vibration absorber. A new set of optimum tuning frequency and damping of the absorber is derived, thereby resulting in lower maximum amplitude responses than those reported in the literature. The proposed optimized variant DVA is also compared to a ground-hooked damper of the same damping capacity of the damper in the DVA. It is proved that the proposed optimized DVA has better suppression of the resonant vibration amplitude of the controlled system than both the traditional DVA and also the ground-hooked damper if the proposed design procedure of the variant DVA is followed.

show abstract

Closed form optimal solution of a tuned liquid column damper for suppressing harmonic vibration of structures

Cited by 75 publications

References 11 publications

Modified liquid column damper for vibration control of structures

Modified liquid column damper for vibration control of structures

Comparison of Performance of Different Tuned Liquid Column Dampers (TLCDs)

H-infinity optimization of a variant design of the dynamic vibration absorber—Revisited and new results

Contact Info

Product

Resources

About