On the development of a generalized atmospheric boundary layer velocity profile for offshore engineering applications considering wind–wave interaction

Townsend, Jamie F.; Xu, Guoji; Jin, Yuanjie; Yu, Enbo; Wei, Huan; Han, Yan

doi:10.1016/j.oceaneng.2023.115621

Cited by 4 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wind velocity Vz and the turbulence intensity Iz are assumed to follow a power law along the height z, with a power index of 0.12 for a marine terrain [4], as shown in Equation (37). 0.12 10 0.12 ( /10) 0.12(10 / )…”

Section: Environmental Excitationsmentioning

confidence: 99%

“…As shown in Figure 1, offshore substations are constructed to be supported by a jacket type or a mono-pile type, with sustainable power instruments equipped to the frame structure above sea level so that they are protected from sea intrusion [2]. However, located in a complex environment, particularly excited by stochastic wind, wave, and current loadings, they are often subjected to strong vibrations [3,4]. These long-time harmful vibrations adversely impact the normal operation of instruments, which may tremendously increase the operation and maintenance costs of sustainable power [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lightweight Design of Vibration Control Devices for Offshore Substations Based on Inerters

Wang,

Xu,

et al. 2024

Sustainability

View full text Add to dashboard Cite

Offshore substations are important sustainable power infrastructures subjected to strong vibrations induced by complex environmental excitations such as wind, waves, and currents. To protect the structures and expensive facilities, lightweight vibration control devices are highly desirable in offshore substations. With a high-performance energy dissipation device, the inerter, the conventional Tuned Mass Damper (TMD) is upgraded for lightweight vibration control. The optimal parametric design and performance evaluation of single- and double-tuned vibration control devices is performed based on the H-norm criteria. The corresponding equivalent mass ratios of both single- and double-tuned vibration control devices are summarized and formulated in a systematical manner. Finally, the presented optimal design formulas, equivalent mass ratios, and control performances are validated by vibration control analyses on a practical offshore substation. The results show that inerter-based vibration control devices can be effectively equivalent to a TMD, with the equivalent mass ratio. The double-tuned inerter-based device could save 25% mass compared to a TMD. With a Tuned Mass Damper Inerter (TMDI), the responsibility for the mass could be shared with dual-end connected inerters. Meanwhile, the Tuned Viscous Mass Damper (TVMD) completely replaces the mass block with an inerter, which has a superior lightweight vibration control performance.

show abstract

Section: Environmental Excitationsmentioning

confidence: 99%