超大型储液舱内晃荡载荷实验研究

摘要/Abstract

摘要：

超大型浮式液化天然气船薄膜型液舱内液体晃荡载荷是一个关键问题.采用实验方法研究纵荡,横荡和横摇下储舱内晃荡荷载的分布规律, 具体包括冲击载荷的时程分析,最大冲击荷载分布规律和其对应的危险载液率.在室内开展大比尺八边形模型液体晃荡实验, 采用阵列式布置压力传感器监测冲击压力的变化及其分布特性.实验结果表明: 60%~70%为最危险载液率, 液舱外形曲率突变的位置冲击压力较大.研究结果可为液舱结构加强设计及分析提供依据.

关键词: 晃荡载荷, 大比尺模型实验, 冲击压力, 激励, 危险载液率

Abstract:

Liquid sloshing load is one of the key issues in the design of the cargo container system of the very large-scale floating liquefied natural gas (FLNG) facility. Experimental investigation on liquid slamming in a large-scale prismatic tank under sway, surge, and roll excitations is performed, aiming at the time history of slamming pressure, the distribution of the largest impact pressure and the most serious filling rates. A series of experiments in a large-scale prismatic model is carried out. Pressure sensor array is employed to record the variation of impact pressure. The experimental results illustrate that the value between 60%~70% is the most serious filling rate. Furthermore, the position with change of curvature along the bulkhead is found to be the most serious position for tank structure. The results are useful for the research and design associated with slamming load in prismatic tank.

Key words: sloshing load, large-scale model experiment, slamming pressure, excitation, the most serious filling rate

中图分类号:

卫志军, 阮诗伦, 岳前进, 谢彬. 超大型储液舱内晃荡载荷实验研究[J]. 海洋工程装备与技术, 2014, 1(1): 55-61.

Zhi-jun WEI, Shi-lun RUAN, Qian-jin YUE, Bin XIE. Experimental Investigation of Liquid Sloshing Impact Load in a Large-Scale Prismatic Tank[J]. Ocean Engineering Equipment and Technology, 2014, 1(1): 55-61.

图/表 11

图1

图2

图3

图4

表1

表2

表3

图5

图6

图7

图8

参考文献 21

[1]	American Bureau of Shipping. Floating offshore liquefied gas terminals[S]. Houston: American Bureau of Shipping, 2010.
[2]	Bureau Veritas.Design sloshing loads for LNG membrane tanks. Guidance Note NI 554[S]. Paris: Bureau Veritas, 2011.
[3]	Det Norske Veritas.Sloshing analysis of LNG membrane tanks. Guidance Notes No.309[S]. Oslo: Det Norske Veritas, 2006.
[4]	Kuo J F, Campbell R B, Ding Z, et al.LNG tank sloshing assessment methodology: the new generation[C]. ISOPE Conference, 2009.
[5]	Lloyd's Register. Sloshing assessment guidance document for membrane tank LNG operations. Guidance Notes Version 2.0[S]. London: Lloyd's Register, 2009.
[6]	岳宝增, 祝乐梅, 于丹. 储液罐动力学与控制研究进展[J]. 力学进展, 2011, 41(1): 79.
[7]	王德禹. 液化天然气船液舱的晃荡[J]. 计算机辅助工程, 2010, 19(3): 1.
[8]	Faltinsen O M, Timokha A N.Sloshing[M]. Cambridage: Cambridge University Press, 2009. 484-488, 548-550.
[9]	卫志军, 岳前进, 阮诗伦, 等. 矩形液舱晃荡冲击载荷的试验机理研究[J]. 船舶力学, 2012, 16(8): 885.
[10]	朱仁庆, 吴有生, Incecik A.液体晃荡数值模拟研究综述[J]. 中国造船, 2004, 45(2): 14.
[11]	Graczyk M, Moan T.A probabilistic assessment of design sloshing pressure time histories in LNG tanks[J]. Ocean Engineering, 2008, 35(8-9): 834.
[12]	Pistani F, Thiagarajan K.Set-up of a sloshing laboratory at the University of Western Australia[C]. ISOPE Conference, 2010.
[13]	Kim K H, Kim Y, Kim S Y, et al.Comparative study on model-scale sloshing tests[C]. ISOPE Conference, 2011.
[14]	Lugni C, Brocchini M, Faltinsen O M.Wave impact loads: the role of the flip-through[J]. Physics of Fluids, 2006, 18(12): 122101.
[15]	Bass R L, Bowels E B, Endo S, et al.Modeling criteria for scaled LNG sloshing experiments[J]. J Fluids Engineering, 1985, 107(2): 272.
[16]	Bogaert H, Léonard S L. Brosset L, et al.Sloshing and scaling: results from the Sloshel project[C]. ISOPE Conterence, 2012.
[17]	Pasquier R, Berthon C F, Chevreuse S R L. Model scale test vs. full scale measurement: findings from the full scale measurement of sloshing project[C]. ISOPE Conterence, 2012.
[18]	Akyildiz H, Unal E.Experimental investigation of pressure distribution on a rectangular tank due to the liquid sloshing[J]. Ocean Engineering, 2005, 32(11-12): 1503.
[19]	Bunnik T, Huijsmans R.Large scale LNG sloshing model tests[C]. ISOPE Conference, 2007.
[20]	Lafeber W, Brosset L, Bogaert H.Comparison of wave impact tests at large and full scale: results from the Sloshel project[C]. ISOPE Conference, 2012.
[21]	Wei Z J, Yue Q J, Ruan S L.An experimental investigation of liquid sloshing impact load in a rectangular tank[C]. ISOPE Conference, 2012.

激励方式	实验载液率/%	激励振幅
横摇	10, 20, 30, 40, 50, 60, 70, 80, 90	1.5°
纵荡	10, 20, 30, 40, 50, 60, 70, 80, 90	30 mm
横荡	10, 20, 30, 40, 50, 60, 70, 80, 90	30 mm

载液率/%	0.90f_o	0.95f_o	f_o	1.05f_o	1.10f_o	1.15f_o
10	0.359	0.379	0.399	0.419	0.439	0.459
20	0.489	0.516	0.543	0.570	0.597	0.624
30	0.564	0.595	0.627	0.658	0.690	0.721
40	0.608	0.642	0.676	0.709	0.744	0.777
50	0.633	0.668	0.703	0.738	0.773	0.808
60	0.647	0.683	0.719	0.755	0.791	0.827
70	0.655	0.691	0.728	0.764	0.801	0.837
80	0.659	0.696	0.732	0.769	0.805	0.842
90	0.662	0.698	0.735	0.772	0.808	0.845

载液率/%	0.90f_o	0.95f_o	f_o	1.05f_o	1.10f_o	1.15f_o
10	0.266	0.280	0.295	0.310	0.324	0.339
20	0.366	0.387	0.407	0.428	0.448	0.448
30	0.433	0.457	0.481	0.505	0.529	0.553
40	0.479	0.505	0.532	0.558	0.585	0.612
50	0.509	0.537	0.565	0.594	0.622	0.650
60	0.529	0.559	0.588	0.617	0.647	0.676
70	0.543	0.573	0.603	0.633	0.663	0.693
80	0.552	0.582	0.613	0.643	0.674	0.704
90	0.557	0.588	0.619	0.650	0.681	0.712