红土镍矿运输船倾覆特性数值研究
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摘要
为深入揭示易流态货物运输船倾覆发生特性,该文以一舱段为研究对象,采用Herschel-Bulkley和Bingham方程对含水量40%的流态红土镍矿应力-应变特性进行描述,结合VOF方法建立了流态货物舱内晃荡数值计算模型;采用简化物面非线性方法求解舱段外部流场,并建立了流态货物舱内晃荡和舱段间横摇耦合运动数值模型。该模型完整地考虑了流态货物海运过程中舱内晃荡力矩及其对舱段回复力矩削弱的共同作用。结果表明,流态货物舱内晃荡引起的横摇运动不对称现象以及较高的波浪幅值和共振频率是导致易流态货物运输船发生倾覆的主要因素。
To reveal the capsizing characteristics of the liquefiable cargo carrier, a section of the carrier was taken as anexample. The Herschel-Bulkley and Bingham equations were adopted to describe the stress-strain relationship of the liquefiednickel ore with a water content of 40%. Combined with VOF method the numerical model for solving the liquefied nickel oresloshing was established. The external flow field of the section was solved by simplified body surface nonlinear method and thecoupled model between the internal sloshing and the roll motion of the section was set up. The sloshing induced moment and theweaken effect of the liquefied cargo on the restoring moment were fully considered. Results show that the asymmetry of thecoupled roll motion caused by liquefied cargo sloshing, the higher wave amplitude and the resonance frequency are the mainfactors contributing to the capsizing of the carrier.
To reveal the capsizing characteristics of the liquefiable cargo carrier, a section of the carrier was taken as anexample. The Herschel-Bulkley and Bingham equations were adopted to describe the stress-strain relationship of the liquefiednickel ore with a water content of 40%. Combined with VOF method the numerical model for solving the liquefied nickel oresloshing was established. The external flow field of the section was solved by simplified body surface nonlinear method and thecoupled model between the internal sloshing and the roll motion of the section was set up. The sloshing induced moment and theweaken effect of the liquefied cargo on the restoring moment were fully considered. Results show that the asymmetry of thecoupled roll motion caused by liquefied cargo sloshing, the higher wave amplitude and the resonance frequency are the mainfactors contributing to the capsizing of the carrier.
引文
[1]International Maritime Organization.International Maritime Solid Bulk Cargoes(IMSBC)Code[R].2012.
[2]张建伟.易流态货物舱内晃荡对舱段运动及稳性影响的数值研究[D].大连海事大学,大连,中国,2016.ZHANG Jian-wei.Numerical study on the effect of liquefiable cargo sloshing on motion and stability of a cargo hold section[D].Dalian Martime University,Dalian,China,2016.
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[11]周健,朱耀民,简琦薇,等.红土镍矿流态化特性的模型试验研究[J].岩土工程学报,2014,36(8):1515-1520.ZHOU Jian,ZHU Yao-min,JIAN Qi-wei,et al.Modeling experiments on the fluidization of laterite nickel ore in bulk[J].Chinese Journal of Geotechnical Engineering,2014,36(8):1515-1520.
[12]BAKKER C W,MEYER C J,DEGLON D A.Numerical modelling of non-Newtonian slurry in a mechanical flotation cell[J].Minerals Engineering,2009,22(11):944-950.
[13]BAKKER C W,MEYER C J,DEGLON D A.The development of a cavern model for mechanical flotation cells[J].Minerals Engineering,2010,23(11):968-972.
[14]FONSECA N,SOARES C G.Validation of a timedomain strip method to calculate the motions and loads on a fast monohull[J].Applied Ocean Research,2004,26(6):256-273.
[15]MITRA S,WANG C Z,REDDY J N,et al.A 3D fully coupled analysis of nonlinear sloshing and ship motion[J].Ocean Engineering,2012,39(1):1-13.
[16]GAO Z,GAO Q,VASSALOS D.Numerical study of damaged ship flooding in beam seas[J].Ocean Engineering,2013,61(2):77-87.
[17]王田华,顾民,鲁江,等.内倾船型的瘫船倾覆特性研究[J].船舶力学,2014,18(4):363-369.WANG Tian-hua,GU Min,LU Jiang,et al.Study on capsizing characteristic of a tumblehome hull under dead ship conditon[J].Jouranl of Ship Mechanics,2014,18(4):363-369.
[18]ROGNEBAKKE O F,FALTINSEN?O M.Coupling of sloshing and ship motions[J].Journal of Ship Research,2003,47(3):208-221.
[2]张建伟.易流态货物舱内晃荡对舱段运动及稳性影响的数值研究[D].大连海事大学,大连,中国,2016.ZHANG Jian-wei.Numerical study on the effect of liquefiable cargo sloshing on motion and stability of a cargo hold section[D].Dalian Martime University,Dalian,China,2016.
[3]INTERCARGO.[R].Bulk Carrier Casualty Report,2016.
[4]JU L,XUE Y,VASSALOS D,et al.Numerical investigation of rolling response of a 2D rectangular hold,partially filled with moist bulk cargo[J].Ocean Engineering,2017,142:348-362.
[5]SPANDONIDIS C C,SPYROU K J.Coupled vessel dry granular cargo roll dynamics in regular beam seas[J].Ocean Engineering.2016,120:238-245.
[6]KOROMILA I A,SPANDONIDIS C C,SPYROU K J.Experimental investigation of cargo liquefaction and impact on the stability of a bulk-carrier[C].Proceedings of the 13th International Ship Stability Workshop.Brest,France,2013.
[7]丁峻宏,金允龙,王惠.基于ALE的矿粉货物液化晃荡问题并行数值模拟[J].船舶力学,2015,19(8):927-933.DING Jun-hong,JIN Yun-long,Wang Hui.ALE-based parallel numerical simulation for sloshing problem of liquefied ore fines cargo[J].Journal of Ship Mechanics,2015,19(8):927-933.
[8]管陈,董国祥,高家镛,等.镍矿砂液化演变过程的摇摆台试验研究[J].水动力学研究与进展,2014,29(6):700-705.GUAN Chen,DONG Guo-xiang,GAO Jia-yong,et al.Platform experiment and research of nickel ore liquefaction process[J].Chinese Journal of Hydrodynamics,2014,29(6):700-705.
[9]邹友家,沈淳,奚祥英.镍矿运输船沉没机理的数值模拟分析[J].船舶力学,2015,19(8):912-918.ZOU You-jia,SHEN Chun,XI Xiang-ying.Numerical simulations on the mechanisms of the capsizing of bulk nickel ore carrier[J].Journal of Ship Mechanics,2015,19(8):912-918.
[10]VASSALOS D,FRANCESCUTTO A,NEVES M.Specialissue on the stability of ships and ocean vehicles[J].Ocean Engineering,2016,125:349-351.
[11]周健,朱耀民,简琦薇,等.红土镍矿流态化特性的模型试验研究[J].岩土工程学报,2014,36(8):1515-1520.ZHOU Jian,ZHU Yao-min,JIAN Qi-wei,et al.Modeling experiments on the fluidization of laterite nickel ore in bulk[J].Chinese Journal of Geotechnical Engineering,2014,36(8):1515-1520.
[12]BAKKER C W,MEYER C J,DEGLON D A.Numerical modelling of non-Newtonian slurry in a mechanical flotation cell[J].Minerals Engineering,2009,22(11):944-950.
[13]BAKKER C W,MEYER C J,DEGLON D A.The development of a cavern model for mechanical flotation cells[J].Minerals Engineering,2010,23(11):968-972.
[14]FONSECA N,SOARES C G.Validation of a timedomain strip method to calculate the motions and loads on a fast monohull[J].Applied Ocean Research,2004,26(6):256-273.
[15]MITRA S,WANG C Z,REDDY J N,et al.A 3D fully coupled analysis of nonlinear sloshing and ship motion[J].Ocean Engineering,2012,39(1):1-13.
[16]GAO Z,GAO Q,VASSALOS D.Numerical study of damaged ship flooding in beam seas[J].Ocean Engineering,2013,61(2):77-87.
[17]王田华,顾民,鲁江,等.内倾船型的瘫船倾覆特性研究[J].船舶力学,2014,18(4):363-369.WANG Tian-hua,GU Min,LU Jiang,et al.Study on capsizing characteristic of a tumblehome hull under dead ship conditon[J].Jouranl of Ship Mechanics,2014,18(4):363-369.
[18]ROGNEBAKKE O F,FALTINSEN?O M.Coupling of sloshing and ship motions[J].Journal of Ship Research,2003,47(3):208-221.