To achieve a reliable structural model for vortex-induced vibration (VIV) the prediction of flexible risers, this paper employs structural systems with different geometrical nonlinearities (including a linear structure, a nonlinear one, a coupled cross-flow, and axial nonlinear one) and a classical oscillator to simulate cross-flow VIV. By comparing the experimental and simulation results, it is found that when the drag coefficient is assumed to be a fixed constant along the cylinder (i.e., the damping model is linear function of current velocity), it can affect the vibration amplitude considerably and may alter the dominant modes. When the excited mode of VIV is bending-stiffness dominant, the cross-flow structural nonlinearities can have a profound stiffening effect on vibration response. Although the introduction of axial deformation can reduce this function, the coupled cross-flow and axial nonlinearities still have the effect of decreasing the VIV amplitude.
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June 2017
Research-Article
Cross-Flow Vortex-Induced Vibration Simulation of Flexible Risers Employing Structural Systems of Different Nonlinearities With a Wake Oscillator
Shuai Meng,
Shuai Meng
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: mengshuai001@sjtu.edu.cn
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: mengshuai001@sjtu.edu.cn
Search for other works by this author on:
Xuefeng Wang
Xuefeng Wang
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangxuef@sjtu.edu.cn
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangxuef@sjtu.edu.cn
Search for other works by this author on:
Shuai Meng
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: mengshuai001@sjtu.edu.cn
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: mengshuai001@sjtu.edu.cn
Xuefeng Wang
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangxuef@sjtu.edu.cn
Collaborative Innovation Center for
Advanced Ship and Deep-Sea Exploration,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangxuef@sjtu.edu.cn
1Corresponding author.
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received August 6, 2016; final manuscript received November 17, 2016; published online March 27, 2017. Assoc. Editor: Robert Seah.
J. Offshore Mech. Arct. Eng. Jun 2017, 139(3): 031801 (7 pages)
Published Online: March 27, 2017
Article history
Received:
August 6, 2016
Revised:
November 17, 2016
Citation
Meng, S., and Wang, X. (March 27, 2017). "Cross-Flow Vortex-Induced Vibration Simulation of Flexible Risers Employing Structural Systems of Different Nonlinearities With a Wake Oscillator." ASME. J. Offshore Mech. Arct. Eng. June 2017; 139(3): 031801. https://doi.org/10.1115/1.4035306
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