Smart Structures and Systems

  • 제9권2호
  • /
  • Pages.165-188
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  • 2012
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Design tables and charts for uniform and non-uniform tuned liquid column dampers in harmonic pitching motion

  • Wu, Jong-Cheng (Department of Civil Engineering, Tamkang University) ;
  • Wang, Yen-Po (Department of Civil Engineering, National Chiao Tung University) ;
  • Chen, Yi-Hsuan (Department of Civil Engineering, National Chiao Tung University)
  • 투고 : 2011.01.31
  • 심사 : 2012.02.02
  • 발행 : 2012.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

In the first part of the paper, the optimal design parameters for tuned liquid column dampers (TLCD) in harmonic pitching motion were investigated. The configurations in design tables include uniform and non-uniform TLCDs with cross-sectional ratios of 0.3, 0.6, 1, 2 and 3 for the design in different situations. A closed-form solution of the structural response was used for performing numerical optimization. The results from optimization indicate that the optimal structural response always occurs when the two resonant peaks along the frequency axis are equal. The optimal frequency tuning ratio, optimal head loss coefficient, the corresponding response and other useful quantities are constructed in design tables as a guideline for practitioners. As the value of the head loss coefficient is only available through experiments, in the second part of the paper, the prediction of head loss coefficients in the form of a design chart are proposed based on a series of large scale tests in pitching base motions, aiming to ease the predicament of lacking the information of head loss for those who wishes to make designs without going through experimentation. A large extent of TLCDs with cross-sectional ratios of 0.3, 0.6, 1, 2 and 3 and orifice blocking ratios ranging from 0%, 20%, 40%, 60% to 80% were inspected by means of a closed-form solution under harmonic base motion for identification. For the convenience of practical use, the corresponding empirical formulas for predicting head loss coefficients of TLCDs in relation to the cross-sectional ratio and the orifice blocking ratio were also proposed. For supplemental information to horizontal base motion, the relation of head loss values versus blocking ratios and the corresponding empirical formulas were also presented in the end.

키워드

과제정보

연구 과제 주관 기관 : National Science Council of Taiwan

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피인용 문헌

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  2. Experimental Study on Variation Rules of Damping with Influential Factors of Tuned Liquid Column Damper vol.2017, 2017, https://doi.org/10.1155/2017/6209205
  3. Tuned liquid column damper for suppressing pitching motion of a floating rectangular box structure vol.24, pp.11, 2017, https://doi.org/10.1002/stc.2014
  4. Effects of TLCD with maneuverable flaps on vibration control of a SDOF structure vol.52, pp.6, 2017, https://doi.org/10.1007/s11012-016-0473-4
  5. A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms vol.8, pp.12, 2015, https://doi.org/10.3390/en8010111
  6. Vibration Mitigation of Structures through TLCD with Embedded Baffles vol.41, pp.2, 2017, https://doi.org/10.1007/s40799-016-0163-0
  7. Optimum LCVA for suppressing harmonic vibration of damped structures vol.20, pp.4, 2012, https://doi.org/10.12989/sss.2017.20.4.461
  8. Experimental comparison of nonlinear damping performance of toroidal and conventional tuned liquid column dampers vol.104, pp.4, 2012, https://doi.org/10.1007/s11071-021-06552-7
  9. Optimized parameters of toroidal tuned liquid column dampers for multidirectional pitching vibration mitigation of structures vol.64, pp.6, 2012, https://doi.org/10.1007/s00158-021-03015-w