NUMERICAL INVESTIGATION ON THE EFFECTS OF WAVE GROUPING ON THE MOTION OF MOORED DDMS PLATFORM

Authors

Xing-Gang Wang, Nanjing Hydraulic Research Institute, Nanjing, Jiangsu, China
Zhao-Chen Sun, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, China.Follow
Shu-Xiu Liang, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, China.
Si Liu, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, China.
Shu-Xue Liu, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, China.
Jun-Bin Luo, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, China.

Abstract

The random wave groups with the same wave parameters, such as significant wave height, period and overshoot parameter, but with different wave groupiness are simulated by an empirical wave envelope spectrum involved the group height factor GFH and group length factor GLF based on field measured sea waves. A geometrically nonlinear finite element method based on the total Lagrangian formulation is developed to calculate the mooring-line dynamics. Coupled dynamic analysis of DDMS (Deep Draft Multi-Spar) platform and the attached mooring lines under the action of wave groups with different groupiness in deep water is executed in time domain. The effects of groupiness parameters on wave surfaces, motions of DDMS and tensions in the mooring lines are detailed in this paper.

Recommended Citation

Wang, Xing-Gang; Sun, Zhao-Chen; Liang, Shu-Xiu; Liu, Si; Liu, Shu-Xue; and Luo, Jun-Bin (2013) "NUMERICAL INVESTIGATION ON THE EFFECTS OF WAVE GROUPING ON THE MOTION OF MOORED DDMS PLATFORM," Journal of Marine Science and Technology: Vol. 21: Iss. 3, Article 4.
DOI: 10.6119/JMST-012-0419-1
Available at: https://jmstt.ntou.edu.tw/journal/vol21/iss3/4