Experimental study of ship mooring force under action of landslide in Three Gorges Reservoir area
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摘要: 长江是我国最重要的内河航道, 号称“黄金航道”,航道内船舶数量众多,因装卸货物等原因处于锚泊状态的船只十分常见。三峡工程蓄水后,库区滑坡频发,滑坡产生的涌浪很可能使船舶锚链发生断裂,造成巨大的人身伤害和财产损失。目前主要采用理论分析和经验分析的方法对船舶锚链及受力进行研究,物理模型试验的研究分析较少,因而在设计锚链拉力时可能会与实际情况有较大出入。通过岩体滑坡涌浪物理模型试验研究不同工况滑坡体情况下位于滑坡附近河道弯道段和直道段船舶锚链拉力的变化情况,得到涌浪传播过程中船舶首尾锚链拉力的变化规律,分析得到不同波高、周期及水深情况下船舶锚链拉力的变化规律,运用多元回归分析得到最大锚链拉力的经验计算式。研究结果可为三峡库区船舶安全管理提供相应参考。Abstract: The Yangtze River, known as a "golden waterway", is the most important inland waterway in China. There are lots of ships in the waterway, many of which are in the mooring state due to loading or unloading and other reasons. After the impoundment of the Three Gorges project, the landslide occurs frequently in the reservoir area. The landslide-generated surge is likely to make the ship chain broken, which will cause seriours personal injury and property damage. At present, the main methods to study the force on the ship anchor chain are theoretical analysis and empirical analysis methods, while physical model tests are less used. Therefore, the discrepancy of the mooring force may appear betweeen the design situation and the actual situation. Based on the rock landslide physical model test, the researches on the mooring force change of the ships located in the river bend section and the straight segment near the landslide are carried out under different landslide conditions. The change law of the mooring forces near the bow and stern in the surge propagation process is obtained. And the change rules of ship mooring forces under different wave heights, different periods and different water depths are also got. Finally, the maximum mooring force calculation formula is deduced by using the multiple regression analysis method. The results can provide a reference for the safety management of ships in the Three Gorges Reservoir area.
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Key words:
- Three Gorges Reservoir area /
- landslide /
- ship mooring /
- mooring force
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表 1 概化滑坡体几何参数
Table 1. Geometric parameters of generalized landslide
滑坡体 宽度/m 厚度/m 长度/m 1 0.5 0.2 1 2 1.0 0.4 1 3 1.5 0.6 1 表 2 概化模型滑坡体块体尺寸
Table 2. Size of landslide models
cm 块体编号 长 宽 厚 A1 21 14 6 A2 18 12 5 A3 15 10 4 A4 12 8 3 A5 9 6 2 表 3 船舶参数统计
Table 3. Ship parameters
船型 船长/m 型深/m 型宽/m 设计吃水/m 方形系数 满载排水量 实体船 90 4 16 3.3 0.8 3 000 t 模型船 1.28 0.057 0.228 0.047 0.8 8 700 g 表 4 影响因素设计
Table 4. Design of factors and levels
水平 因素 水深/m 宽度/m 厚度/m 滑面倾角/° 1 0.74 0.5 0.5 20 2 0.88 1.0 1.0 40 3 1.16 1.5 1.5 60 表 5 锚链编号位置
Table 5. Anchor number and position
编号 1# 2# 3# 4# 5# 6# 7# 8# 位置 船首右舷 船首左舷 船尾左舷 船尾右舷 船尾左舷 船尾右舷 船首左舷 船首右舷 -
[1] 滨村建治, 余昭允.锚链曲线和锚链抛出长度[J].船舶, 1993(3): 54-58. http://www.doc88.com/p-0042456873839.html HAMAMURA K, YU Zhaoyun. The chain length curve and shackles[J]. Ships, 1993(3): 54-58.(in Chinese) http://www.doc88.com/p-0042456873839.html [2] HUANG S. Dynamic analysis of three-dimensional marine cables[J]. Ocean Engineering, 1994, 21(6): 587-605. doi: 10.1016/0029-8018(94)90008-6 [3] SHASHIKALA A P, SUNDARAVADIVELU R, GANAPATHY C. Dynamics of a moored barge under regular and random waves[J]. Ocean Engineering, 1997, 24(5): 401-430. doi: 10.1016/S0029-8018(96)00019-4 [4] GOBAT J I, GROSENBAUGH M A. A simple model for heave-induced dynamic tension in catenary moorings[J]. Applied Ocean Research, 2001, 23(3): 159-174. doi: 10.1016/S0141-1187(01)00013-X [5] SASA K, INCECIK A. Numerical simulation of anchored ship motions due to wave and wind forces for enhanced safety in offshore harbor refuge[J]. Ocean Engineering, 2012, 44(2): 68-78. https://www.sciencedirect.com/science/article/pii/S0029801812000406 [6] 白辅中.船舶多锚链系泊稳定性计算[J].河海大学学报(自然科学版), 1993, 21(2): 21-27. https://www.wenkuxiazai.com/doc/9a852d0e52d380eb63946d0e-3.html BAI Fuzhong. Stability calculation of multi-anchor chain system[J]. Journal of Hehai University(Natural Science Edition), 1993, 21(2): 21-27.(in Chinese) https://www.wenkuxiazai.com/doc/9a852d0e52d380eb63946d0e-3.html [7] 刘应中, 缪国平, 李谊乐, 等.系泊系统动力分析的时域方法[J].上海交通大学学报, 1997, 31(11): 7-12. https://www.wenkuxiazai.com/doc/695ec4f5710abb68a98271fe910ef12d2af9a937.html LIU Yingzhong, MIAO Guoping, LI Yile, et al. A time domain computation method for dynamic behavior of mooring system[J]. Journal of Shanghai Jiaotong University, 1997, 31(11): 7-12.(in Chinese) https://www.wenkuxiazai.com/doc/695ec4f5710abb68a98271fe910ef12d2af9a937.html [8] 范菊, 黄祥鹿.锚泊线的动力分析[J].中国造船, 1999(1): 13-20. http://www.cqvip.com/qk/90375X/199901/3462889.html FAN Ju, HUANG Xianglu. The analysis of mooring line dynamics[J]. Chinese Ship Building, 1999(1): 13-20.(in Chinese) http://www.cqvip.com/qk/90375X/199901/3462889.html [9] 刘建成, 李润培, 顾永宁, 等.一种简易单点系泊系统的可行性研究[J].上海交通大学学报, 2000, 34(1): 132-136. http://www.cqvip.com/read/read.aspx?id=4617134 LIU Jiancheng, LI Runpei, GU Yongning, et al. Study on the feasibility of a simple single point mooring system[J]. Journal of Shanghai Jiaotong University, 2000, 34(1): 132-136.(in Chinese) http://www.cqvip.com/read/read.aspx?id=4617134 [10] 李天匀, 周崇庆, 刘土光, 等.风浪冲击下锚泊渔船的锚链动力负荷[J].华中理工大学学报, 1998, 26(9): 97-99. http://www.cqvip.com/QK/98270X/199903/3881678.html LI Tianyun, ZHOU Chongqing, LIU Tuguang, et al. The dynamic force acted on the chain cable of mooring fishing ships in the wind and the waves[J]. Journal of Huazhong University of Science and Technology, 1998, 26(9): 97-99.(in Chinese) http://www.cqvip.com/QK/98270X/199903/3881678.html [11] 周崇庆, 刘土光, 李天匀.风浪中锚泊渔船的锚链系泊张力的分析研究[J].中国水产科学, 1999, 6(3): 78-80. http://d.wanfangdata.com.cn/Periodical/zgsckx199903018 ZHOU Chongqing, LIU Tuguang, LI Tianyun. Analysis of chain tension for fishing vessel anchoring in rough water[J]. Journal of Fishery Science of China, 1999, 6(3): 78-80.(in Chinese) http://d.wanfangdata.com.cn/Periodical/zgsckx199903018 [12] 侯建军, 东昉, 石爱国, 等.锚泊状态下锚链作用力的计算方法[J].大连海事大学学报, 2005, 31(4): 10-14. http://www.cqvip.com/Main/Detail.aspx?id=20689550 HOU Jianjun, DONG Fang, SHI Aiguo, et al. Calculation method of chain force on ship at anchor[J]. Journal of Dalian Maritime University, 2005, 31(4): 10-14.(in Chinese) http://www.cqvip.com/Main/Detail.aspx?id=20689550 [13] 交通部第一航务工程勘察设计院. 海港工程设计手册(中)[S]. 北京: 人民交通出版社, 1994. The First Survey and Design Institute of the Ministry of Transportation. Navigational engineering port engineering design manual (middle)[S]. Beijing: China Communications Press, 1994.(in Chinese) [14] 孙一艳, 王刚, 陈国强, 等.风浪流作用下单船艏艉锚泊允许波高的试验研究[J].水运工程, 2015(11): 25-29. doi: 10.3969/j.issn.1002-4972.2015.11.005 SUN Yiyan, WANG Gang, CHEN Guoqiang, et al. Stern mooring of a single ship under combined action of wind, wave and current[J]. Port and Waterway Engineering, 2015(11): 25-29.(in Chinese) doi: 10.3969/j.issn.1002-4972.2015.11.005 [15] 李焱, 肖辉, 李松喆, 等. "开"型浮箱式防波堤运动特性和锚链力试验[J].水道港口, 2015, 36(6): 474-480. http://www.cqvip.com/QK/95060X/201506/667720362.html LI Yan, XIAO Hui, LI Songzhe, et al. Experimental study on motions and mooring forces of开-type pontoon floating breakwater[J]. Journal of Waterway and Harbour, 2015, 36(6): 474-480.(in Chinese) http://www.cqvip.com/QK/95060X/201506/667720362.html -