Feasible Region Study on Main Dimensions of CALM Buoys

SUN Qiang; PENG Dongsheng; ZHANG Yiming; DONG Qinghui; YUE Qianjin; WU Feng; YAN Jun; ZHONG Wanxie

doi:10.21656/1000-0887.420115

Volume 43 Issue 3

Mar. 2022

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Article Navigation > Applied Mathematics and Mechanics > 2022 > 43(3): 281-289

SUN Qiang, PENG Dongsheng, ZHANG Yiming, DONG Qinghui, YUE Qianjin, WU Feng, YAN Jun, ZHONG Wanxie. Feasible Region Study on Main Dimensions of CALM Buoys[J]. Applied Mathematics and Mechanics, 2022, 43(3): 281-289. doi: 10.21656/1000-0887.420115

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Feasible Region Study on Main Dimensions of CALM Buoys

doi: 10.21656/1000-0887.420115

1.
Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian, Liaoning 116023, P.R.China
2.
Dalian Shipbuilding Industry Engineering and Research Institute Co. , Ltd. , Dalian, Liaoning 116005, P.R.China

Received Date: 2021-04-28
Accepted Date: 2021-04-08
Rev Recd Date: 2022-01-07

Available Online: 2022-02-16

Publish Date: 2022-03-08

Abstract

Abstract

To design reasonable main dimensions of catenary anchor leg mooring (CALM) buoys, 5 main design requirements were summarized. Based on practical engineering experiences, the mother model estimation method was established against the buoy weight. The reserve buoyancy was discussed, and the equal freeboard scheme set was proposed. The free floating stability of buoys was discussed based on the statics principle. Dynamic responses of buoys were discussed base on hydrodynamics, with the heave and roll characteristic vs. CALM buoy diameters presented. With the upper and lower limits on buoy diameters under 25 m and 100 m water depths as the boundary, a feasible region was built up. Its accuracy was verified in the actual engineer case under the 3 environmental conditions and by reference to the theoretical CALM buoy diameter feasible region under the 45 m water depth. The results show that, different factors, such as the environmental conditions, the mooring chain weight and others can influence the feasible region of buoy diameters, even under the same water depth. A deviation margin of the feasible region should be further considered in practical application. The study of the feasible region has a positive guiding significance to the determination of the main dimensions of CALM buoys.
- CALM buoy,
- main dimension,
- feasible region

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References(15)

References

[1]	HARING R E, ADAMS R B, BEAZLEY R A, et al. Application of probability to design of single-point moorings[J]. Society of Petroleum Engineers Journal, 1969, 10(3): 219-228.
[2]	BERNITSAS M M, PAPOULIAS F A. Stability of single point mooring systems[J]. Applied Ocean Research, 1986, 8(1): 49-58. doi: 10.1016/S0141-1187(86)80031-1
[3]	HWANG Y L. Dynamic analysis for the design of CALM system in shallow and deep waters[J]. Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME, 1997, 119(3): 151-157. doi: 10.1115/1.2829062
[4]	SCHELLIN T E. Mooring load of a ship single-point moored in a steady current[J]. Marine Structures, 2003, 16(2): 135-148. doi: 10.1016/S0951-8339(02)00024-2
[5]	AKYUZ E, CELIK E, A modified human reliability analysis for cargo operation in single point mooring (SPM) off-shore units[J]. Applied Ocean Research, 2016, 58: 11-20.
[6]	BROWN A, GORTER W, PAALVAST M, et al. Design approach for CALM buoy moored vessel in squall conditions[C]//35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016.
[7]	GU H Y, CHEN H C, ZHAO L Y. Coupled mooring analysis of a CALM buoy by a CFD approach[C]//The 27th International Ocean and Polar Engineering Conference. OnePetro, 2017.
[8]	黄国樑, 藤野正隆. 关于风和潮流作用下单点系泊船体的鱼尾状摆动的研究[J]. 海洋工程, 1987, 5(3): 1-13. (HUANG Guoliang, FUJINO M. Fishtailing oscillation of a ship moored to single point mooring systems in wind and current[J]. The Ocean Engineering, 1987, 5(3): 1-13.(in Chinese)
[9]	季春群, 王磊, 彭涛. 单点系泊的系泊稳定性分析[J]. 中国海洋平台, 1998, 13(5/6): 12-14. (JI Chunqun, WANG Lei, PENG Tao. The moored stability of single point mooring system[J]. China Offshore Platform, 1998, 13(5/6): 12-14.(in Chinese)
[10]	杜度, 张纬康, 单点系泊船舶运动的仿真研究[J]. 计算机仿真, 2003, 20(6): 96-99, 103. DU Du, ZHANG Weikang, Simulation study on motion of sigle point mooring vessel[J]. Computer Simulation, 2003, 20(6): 96-99, 103. (in Chinese)
[11]	孙强, 彭贵胜, 董庆辉. 悬链式单点系泊系统设计与分析方法研究[C]//第十六届中国科协年会(分8): 绿色造船与安全航运论坛论文集. 2014: 126-131. SUN Qiang, PENG Guisheng, DONG Qinghui. Design and analysis method research on CALM type single point mooring system[C]//16th Annual Meeting of China Association for Science and Technology (Part Eight): Forum on Green Shipbuilding and Safe Shipping. 2014: 126-131. (in Chinese)
[12]	周楠, 刘旭平, 李俊汲. CALM单点系泊系统设计综述[J]. 海洋工程装备与技术, 2017, 4(2): 102-104. (ZHOU Nan, LIU Xuping, LI Junji. Design method summary of CALM single point mooring[J]. Ocean Engineering Equipment and Technology, 2017, 4(2): 102-104.(in Chinese) doi: 10.3969/j.issn.2095-7297.2017.02.008
[13]	American Bureau of Shipping. Single point moorings[S]. Act of Legislature of the State of New York, 2019.
[14]	BERNARD M. 海洋工程水动力学[M]. 北京: 国防工业出版社, 2012: 151-154. BERNARD M. Hydrodynamique des Structures Offshore[M]. Beijing: National Defense Industry Press, 2012: 151-154. (in Chinese)
[15]	芦苇, 赵冬, 李东波, 等. 基于期望函数的土遗址锚固参数组合优化方法[J]. 应用数学和力学, 2019, 40(6): 650-662. LU Wei, ZHAO Dong, LI Dongbo, et al. A composite optimization method for anchorage parameters of rammed earth sites based on desirability functions[J] Applied Mathematics and Mechanics, 2019, 40(6): 650-662. (in Chinese)