摘要
为进一步评估易流态化固体散装货物运输船舶的稳性安全,提出考虑货物动态失稳的船舶稳性修正方法。基于含水量、密度、压实、堆体表面等货物性态与船舶姿态的动态耦合,分析危害船舶稳性安全的大密度浆液表面效应;通过铝土矿动态失稳试验和船舶稳性近似计算,得到临界浆液密度和临界含水量,给出抑制大密度浆液表面效应的风险控制措施。结果表明:含水量超过14.5%(或19.5%),失稳后的浆液密度达到2.0 t/m^(3)(或1.5 t/m^(3))时,铝土矿运输船的初稳性高度将低于要求,倾覆灾害风险严峻。提出的大密度浆液表面效应,能够拓展液体密度的边界条件,可用于修正非黏性易流态化货物运输船舶初稳性高度,进而评估船舶稳性安全,提高风险防范能力。
In order to further evaluate stability of carriers with solid bulk cargo that may liquefy,a correction method for ship stability was proposed considering dynamic instability of cargo.Firstly,based on dynamic coupling between ship's posture and cargo performance,including its moisture content,density,compaction and pile surface,surface effect of high density slurry,which jeopardized ship stability,was analyzed.Then,critical slurry density and critical moisture content were obtained through dynamic instability experiment of bauxite and approximate calculation of ship stability,and moreover,risk control measures were presented to suppress the surface effect.The results show that the initial stability height of bauxite carriers would not meet minimum requirements and be at severe risks of capsizing disaster in the condition where moisture content exceeds 14.5%and slurry density reaches 2.0 t/m 3,or moisture content at 19.5%and slurry density at 1.5 t/m 3.The term and concept of"surface effect of high density slurry"put forward in this paper extend boundaries of liquid density,and can be utilized to correct initial stability height of bulk carriers with non-viscous cargo that may liquefy,and furthermore to evaluate their stability and safety,improving risk prevention ability.
作者
吴建军
薛孝行
席永涛
金永兴
WU Jianjun;XUE Xiaoxing;XI Yongtao;JIN Yongxing(Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2022年第7期77-84,共8页
China Safety Science Journal
基金
国家重点研发计划项目(2019YFB1600602)
国家自然科学基金面上项目资助(52072237)。
关键词
动态失稳
船舶稳性
修正方法
大密度浆液表面效应
易流态化货物
铝土矿
dynamic instability
ship stability
correction method
surface effect of high density slurry
cargo that may liquefy
bauxite