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Keywords: vibration control
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Proceedings Papers

Proc. ASME. OMAE2020, Volume 9: Ocean Renewable Energy, V009T09A053, August 3–7, 2020
Paper No: OMAE2020-18380
... are investigated. Furthermore, according to the reduction of the structural responses, the suggestions for the design of a TMD under the combined seismic cases for the bottom fixed OWT are summarized. offshore wind turbine earthquake coupled analysis vibration control tuned mass damper VIBRATION...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 2B: Structures, Safety, and Reliability, V02BT02A018, August 3–7, 2020
Paper No: OMAE2020-18674
... into the efficacy of the VEM chosen for passive vibration control of structural components of ship hulls. A case study for free vibration is done with a commercially available VEM, which is used as surface flooring to cover steel plates of ship hulls, thereby acting as vibration dampers. Free vibration results show...
Proceedings Papers

Proc. ASME. OMAE2009, Volume 1: Offshore Technology, 169-174, May 31–June 5, 2009
Paper No: OMAE2009-79186
..., the on-site retesting results showed that the average vibration level of zone I was reduced by 75.08%. The vibration levels of zone II and III were reduced by 49.36% and 49.13% respectively. So, the vibration control methods had the perfect effect on W12-1 platform. mega-frame offshore platform...
Proceedings Papers

Proc. ASME. OMAE2008, Volume 2: Structures, Safety and Reliability, 487-491, June 15–20, 2008
Paper No: OMAE2008-57554
... that to be controlled. The simulation using the finite element program proved that the average displacement decrement of the gas compressor that used the new dampers to control their vibration reduced upwards of 67.2% than the machinery that didn’t use dampers. The new dampers have the better vibration control...
Proceedings Papers

Proc. ASME. OMAE2008, Volume 1: Offshore Technology, 597-601, June 15–20, 2008
Paper No: OMAE2008-57553
... 27 07 2009 The simulation of vibration control of offshore platforms under earthquake loadings is performed in this paper by using the ANSYS software, in which the first three order natural frequencies of the platform are controlled by the ETMD system where the parameters of the system...
Proceedings Papers

Proc. ASME. OMAE2008, Volume 1: Offshore Technology, 35-42, June 15–20, 2008
Paper No: OMAE2008-57034
... in such platforms will be more preferable to merely deck displacement control. Investigation of tuned mass dampers adjustable parameters optimality for vibration control of wave excited structures implies that optimum tuning and damping ratios are strongly dependent to sea-state in addition to system parameters...
Proceedings Papers

Proc. ASME. OMAE2008, Volume 3: Pipeline and Riser Technology; Ocean Space Utilization, 711-716, June 15–20, 2008
Paper No: OMAE2008-57091
... platform vibration control vibration theory offshore platform Proceedings of the ASME 27th International Conference on Offshore Mechanics and Arctic Engineering OMAE2008 June 15-20, 2008, Estoril, Portugal 1 Copyright © 2008 by ASME * Corresponding author. Project supported by Scientific Research...
Proceedings Papers

Proc. ASME. OMAE2008, Volume 3: Pipeline and Riser Technology; Ocean Space Utilization, 717-722, June 15–20, 2008
Paper No: OMAE2008-57092
... that the platform has no mode shape distortion and the best static and dynamic performance. Lastly, vibration control simulations of megaplatforms subject to random excitation wave loads are done using FEM software. Results show that the new MFP has better vibration control effect than the traditional jacket...
Proceedings Papers

Proc. ASME. OMAE2007, Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design, 175-179, June 10–15, 2007
Paper No: OMAE2007-29141
... the best vibration control effect when the frequencies’ bandwidth is 0.45; the damping coefficient is 0.1 and the number of the ETMDs is 5. In order to analyze the dynamic response of the combined anti-vibration platform under the random seismic loads, the El-Centro, Taft and Qian’an seismic waves were...
Proceedings Papers

Proc. ASME. OMAE2007, Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design, 181-186, June 10–15, 2007
Paper No: OMAE2007-29142
... by the increase of the stiffness is much bigger than the decrease of the platform’s deformation and the increase of the columns’ loads’ equality. The analyses also show that the slope angle of the platforms’ columns must be set around 10°. Mega-frame platform vibration control vibration theory offshore...
Proceedings Papers

Proc. ASME. OMAE2004, 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts A and B, 17-22, June 20–25, 2004
Paper No: OMAE2004-51008
... by choosing appropriate feedback gain among several gain candidates based on the AMD limits. 05 01 2009 offshore platform vibration control wave loading AMD constraints uncertainties. In the present study, noise terms for generating filtered wave loading and accounting for model...
Proceedings Papers

Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 529-541, June 12–17, 2005
Paper No: OMAE2005-67245
... an external sleeve to the spar. Active injection was found highly effective, and even capable of totally eliminating VIM. The passive alternative was also found to reduce VIM, but is not as effective as active injection. 19 11 2008 Vortex-Induced Motion Spar Vibration Control Mitigation...
Proceedings Papers

Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 543-547, June 12–17, 2005
Paper No: OMAE2005-67246
... employing only state feedback. 19 11 2008 offshore platform random wave vibration control feedforward-feedback control advantage in performance over the control method employing o K fe IN p in in w co v d sa H st en Proceedings of OMAE2005nly state feedback. ey words: offshore platform...
Proceedings Papers

Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 659-663, June 12–17, 2005
Paper No: OMAE2005-67323
... beams endure the horizontal load and averagely transfer the weight of the platform to the columns. The static analysis, mode analysis and simulation of vibration control are performed for the concept platform and other three types of platforms for comparisons. It is concluded that the concept platform...
Proceedings Papers

Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2, 737-741, June 12–17, 2005
Paper No: OMAE2005-67324
... The turned mass damper (TMD) system has found extensive applications in vibration control nowadays. The main disadvantage of the system is to add additional mass to the structures. In order to make use of its merits and overcome its disadvantage, the developed turned mass damper (DTMD) vibration...
Proceedings Papers

Proc. ASME. OMAE2006, Volume 1: Offshore Technology; Offshore Wind Energy; Ocean Research Technology; LNG Specialty Symposium, 601-605, June 4–9, 2006
Paper No: OMAE2006-92552
... vibration control effect when the non-dimensional frequency bandwidth Ω, which is defined as the ratio of the frequency range to the controlled (target) platforms natural frequency, is in [0.35, 0.6]; 2) the damping coefficient ξ of ETMD systems is in [0.05, 0.15] and 3) the number of the ETMDs is 5 when Ω...