期刊
APPLIED OCEAN RESEARCH
卷 107, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apor.2020.102482
关键词
Dynamic response of offshore jacket platform; brace-viscous damper system; toggle configuration; chevron configuration; diagonal configuration
资金
- MIUR, through the Conversione di Piattaforme Off-Shore per usi multipli eco-sostenibili -PlaCE [ARS01 00891]
The study shows that the brace-viscous damper system significantly affects the dynamic response of offshore platforms, with the toggle configuration performing the best in reducing platform displacement standard deviation and maximizing reduction of base shear force. Increasing the brace area leads to a decrease in structure displacement response for all configurations. Through numerical simulations, an optimized spatial distribution for the brace-viscous damper system is proposed, with the toggle configuration outperforming other damper systems and uncontrolled platforms in terms of dynamic response.
We investigate the effects of a brace-viscous damper system on the dynamic response of offshore platforms. To do this, offshore jacket platforms with various distributions and three different configurations of brace-viscous damper systems toggle, chevron, and diagonal configurations and a wide range of brace stiffness are numerically modelled under the loading of irregular waves in ANSYS software. The dynamic response of the developed numerical model and its various brace-viscous damper configurations are validated against literature experimental and numerical results. Such a validation revealed an excellent agreement between the numerical results and the benchmark data. The results suggest that the standard deviation of the platform displacement given by a toggle configuration is less than that due to the chevron and diagonal configurations. Moreover, the maximum reduction of the base shear force is achieved by the application of the toggle configuration. Regarding the brace stiffness (area), for a reference damping coefficient of 500 N.m/s, a 54% increase in the brace area (from 42 to 91.8 mm(2)) results in a 21.26%, 38.61%, and 17.57% reduction in the structure displacement response for the diagonal, chevron, and toggle configurations, respectively. Using the results of the numerical simulations, we propose the spatially-optimized distribution of the brace-viscous damper system. Comparing the numerical results of this paper with those of field observations it was shown that the viscous damper with toggle configuration outperforms both the viscoelastic damper and uncontrolled platforms in terms of dynamic response.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据