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International Journal of Fluid Mechanics Research
CiteScore™: 0.5 SNIP: 0.446 SJR: 0.22

ISSN Print: 1064-2277
ISSN Online: 2152-5102

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v42.i3.10
pages 191-205

Numerical Investigation of Dynamic Response of Deploying System during a Circular Cylinder Lowering through Air-Water Interface

Xiaozhou Hu
College of Mechanical and Electrical Engineering, Central South University, Key Laboratory of Modern Complex Equipment Design and Extreme Manufacturing Changsha 410083, Hunan, China
Shaojun Liu
College of Mechanical and Electrical Engineering, Central South University, Key Laboratory of Modern Complex Equipment Design and Extreme Manufacturing Changsha 410083, Hunan, China

ABSTRACT

Dynamic response of deployment system after a circular cylinder impacting with initial calm water during deploying operation is numerically investigated. The discretization of the RANS equations is achieved by a finite volume approach (FV), and the volume of fluid method (VOF) is employed to track the complicated free surface. A 1-Degree-of-freedom (1-DOF) approach is applied to investigate the dynamic problem of cable-deployed body system. An integral solution platform based on CFD code and MATLAB is built to study the fluid-solid coupling problem in the process of deployed body deploying through air-water interface. Several simulations are performed based on the integral solution platform. The sensitivity of cable tension, velocity and acceleration of deployed body to different input parameters is studied, including weights of circular cylinder, deploying velocities and stiffness of cable. Time histories of velocity, acceleration and tension of circular cylinder during its lowering through water surface are presented, and relationship between them and input parameters are discussed. The numerical results can provide references for the deploying operation of offshore structures.