All-metal brace with hysteresis dissipation for impact protection of jacket platforms

Wang, Shuqing; Meng, Xiangjian; Ji, Shubin; Fang, Hui; Liu, Yong; Duan, Liya

doi:10.1016/j.marstruc.2019.02.009

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…Axial deformation of the trigger point can only be changed by adjusting slenderness ratio. e increase in K S leads to a negative effect on energy dissipation, which is due to more potential energy absorbed by springs, resulting in smaller loops [18]. In general, slenderness ratio is the most significant parameter due to its strong effect on all three factors.…”

Section: Hysteresis Loop Of the Nsdmentioning

confidence: 99%

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Design and Simulation of a Damper with Negative Stiffness for Vibration Mitigation from Drilling Equipment to a Semi-Submersible Platform

Zhang

Wang

Fang

et al. 2020

Shock and Vibration

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A negative-stiffness damper (NSD) that incorporates eccentric columns and high-stiffness springs is proposed for vibration mitigation from drilling equipment to a semi-submersible platform. Eccentric columns are considered as negative-stiffness elements, which can provide high static stiffness and achieve negative stiffness with hysteresis energy dissipation caused by buckling mode transition under dynamic conditions. With the assistance of high-stiffness springs, the damper possesses a hysteresis loop that can dissipate vibration energy and mitigate responses. Firstly, the hysteresis characteristics and negative stiffness of eccentric columns are analyzed. Then, the design principle of the NSD is derived, and several characteristics required for applications are investigated. In addition, an NSD system is designed for a target drilling mud pump based on measured data, and the mitigation performance is analyzed by comparing the vibration responses between cases of the proposed NSD system and the steel pedestal. The results demonstrate that the proposed system can effectively reduce the width of affected coverage and the magnitudes of vibration responses. The investigations performed in this paper not only provide the design principle of the new damper, but also prove the great potential of the proposed damper in vibration mitigation from drilling equipment to the hull of the platform.

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Section: Hysteresis Loop Of the Nsdmentioning

confidence: 99%

“…Wu and Phillips [17] designed a shape memory alloy (SMA) capped column with elastic buckling mode jump (BMJ) mechanism, obtaining flag-shaped hysteretic damping without material failure. Wang et al [18] designed an all-metal brace with hysteresis dissipation for impact protection of jacket platforms.…”

Section: Introductionmentioning

confidence: 99%