Results 41 to 50 of about 1,280 (210)

New method in suppressing vortex-induced vibration of marine riser

, 2012
Marine risers are key apparatus in connecting the subsea wells to the oil production platform. When the ocean current flow past a riser, the vortex shedding behind riser may induce vibration. If the frequency of vortex shedding is approaching or equal to
Shi SY(史仕荧), Lin LM(林黎明), 钟兴福, Wu YX(吴应湘), Zhong XF(钟兴福)   +4 more
core   +1 more source

Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework

Advanced Functional Materials, EarlyView.
The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu, Jun Xu, Minmin Fan, Jingcheng Xu, Mengyuan Li, Yun Gong, Weiwei Yang, Lei Li, Yong Zhou, Deqiang Zhao, Yuhua Xue, Xingtao Xu, Chang Q. Sun, Liming Dai   +13 more
wiley   +1 more source

Development of ANN Model for the Prediction of VIV Fatigue Damage of Top-tensioned Riser

MATEC Web of Conferences, 2018
Marine riser experiences vortex-induced vibration (VIV) caused by current, leading to fatigue damage if VIV is not considered in design of riser. Estimation of VIV fatigue damage is essential in designing feasible and operable riser.
Wong Eileen Wee Chin, Choi Han Suk, Kim Do Kyun, Hashim Fakhruldin Mohd   +3 more
doaj   +1 more source

Study on the Vibration Characteristics of Marine Riser Based on Flume Experiment and Numerical Simulation

Journal of Marine Science and Engineering, 2023
This study investigated vortex-induced vibrations of marine risers in Ocean Thermal Energy Conversion systems. Flume experiments were conducted under two conditions: Condition 1 was with a fixed riser bottom, and Condition 2 was with a fixed bottom on a ...
Qiurui Cai, Zhengnong Li, Ricky W. K. Chan, Han Luo, Guodi Duan, Bin Huang, Honghua Wu   +6 more
doaj   +1 more source

Double‐Interpenetrating Composite Bioink for Multi‐Component 3D Bioprinting and Biofabrication

Advanced Functional Materials, EarlyView.
Marine‐polysaccharides‐derived double interpenetrating network hydrogel‐based bioink, combining the attributes of physical and ionic crosslinking, enables room‐temperature bioprinting of mechanically defined structures that can be handled and are cytocompatible.
Fabian Tribukait‐Riemenschneider, V. Prasad Shastri   +1 more
wiley   +1 more source

Impact Analysis of Modal Parameters of Marine Riser Based on Differential Transformation Method

Shiyou jixie, 2018
To study the change rule of modal parameters (natural frequency and vibration mode) of marine risers influenced by structural parameters (riser length and bending stiffness), axial tension (constant tension and variable tension), elastic restraint ...
Chen Wenli, Zhou Xingkun, Zheng Miaozi, Duan Menglan   +3 more
doaj  

Prediction of the vortex-induced vibrations for hang-off drilling risers via integral transform

KSCE Journal of Civil Engineering
When the marine environmental conditions exceed the safe operating limits of the marine riser, the riser must be separated from the blowout preventer (BOP) and enter a suspended state until the conditions improve.
Tongtong Li, Yi Zhang, Haocheng Ni, Wei Wang, Weiping Feng, Zheng Guo, Chen An   +6 more
doaj   +1 more source

Characteristics and forces due to slugs in an 'S' shaped riser [PDF]

, 2003
The characteristics and forces due to slugs in an 'S' shaped riser have been investigated. A series of experiments were carried out using the Cranfield University Riser Test Facility, using a 9.9m high riser. Single phase (water) and two phase (air and
Das, I. A. F.
core  

Natural Biomaterials for Osteochondral Repair: From Source to Strategy

Advanced Healthcare Materials, EarlyView.
Biological origin‐guided overview of natural biomaterials and therapeutic strategies for osteochondral tissue engineering. The circular diagram categorizes representative materials and strategies into plant/algae‐derived, microbial‐derived, animal‐derived, and human‐derived sources, centered on an osteochondral defect repair model.
Hengyu Liu, Hanyang Zhang, Wenbo Yang, Hao Chen, Jincheng Wang, Fei Chang   +5 more
wiley   +1 more source

Research on Full-size Resonant Fatigue Test of Marine Riser

Shiyou jixie, 2017
To address the problem with the mechanism research of full-size resonant bending fatigue test of the marine riser, the mechanical model for eccentric excitation type marine riser resonant bending fatigue test has been established.
Wang Yaofeng, Fan Chunming, Hou Xiaodong, Yang Hu, Yu Tingzhi, Lei Wanzheng, Huo Chong   +6 more
doaj