气压对海上风电一步式运输安装船稳性的影响
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摘要
海上风电一步式运输安装船由船体和端部两个带有风电整机的大尺度复合筒形基础组成.一步式运输安装船为非自航船,在运输的过程中通过与拖轮连接提供动力.筒型基础内部布置有分舱板,在基础内部形成7个舱室.拖航过程中,对筒形基础舱室内部充气使其起浮,与船体凹槽处顶盖板紧密接触.通过模型试验测定了两者之间的竖向压力以及拖航时船体的运动响应.试验结果表明:舱室内气压的大小会影响到筒型基础与船体接触力的变化及船体的稳性,即气压大时,筒型基础与船体接触力大,船体的稳性较好;气压小时,筒型基础与船体接触力小,船体的稳性较差.
The integrated transportation and installation vessel for offshore wind turbine consists of the vessel and two large composite bucket foundations with towers and upper wind turbine configurations.The integrated vessel is nonself-propelled and should be towed by tugboats.Seven compartments are formed in one large composite bucket foundation using bulkheads.And the compartments are air charged and floated and then the bucket foundations are connected with the vessel tightly.The vertical pressure between the vessel and the bucket foundation and the motions of the integrated transportation and installation vessel are investigated.Test results show that the air pressure in the bucket foundations affects both the pressure between the vessel and the bucket foundation and the stability of the vessel.The pressure is larger and the vessel is more stable with the increase of air pressure.
The integrated transportation and installation vessel for offshore wind turbine consists of the vessel and two large composite bucket foundations with towers and upper wind turbine configurations.The integrated vessel is nonself-propelled and should be towed by tugboats.Seven compartments are formed in one large composite bucket foundation using bulkheads.And the compartments are air charged and floated and then the bucket foundations are connected with the vessel tightly.The vertical pressure between the vessel and the bucket foundation and the motions of the integrated transportation and installation vessel are investigated.Test results show that the air pressure in the bucket foundations affects both the pressure between the vessel and the bucket foundation and the stability of the vessel.The pressure is larger and the vessel is more stable with the increase of air pressure.
引文
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[2]乐丛欢,丁红岩,张浦阳.分舱板对海上风机混凝土筒型基础承载模式的影响[J].工程力学,2013,30(4):429-434.Le Conghuan,Ding Hongyan,Zhang Puyang.Influences of bulkheads on the bearing mode of concrete bucket foundation for offshore wind turbine[J].Engineering Mechanics,2013,30(4):429-434(in Chinese).
[3]Zhang Puyang,Han Yanqing,Ding Hongyan,et al.Field experiments on wet tows of an integrated transportation and installation vessel with two bucket foundations for offshore wind turbines[J].Ocean Engineering,2015,108:769-777.
[4]Ding Hongyan,Lian Jijian,Li Aidong,et al.Onestep-installation of offshore wind turbine on large-scale bucket-top-bearing bucket foundation[J].Transactions of Tianjin University,2013,19(3):188-194.
[5]Chakrabarti S K.Scale effects on a unique launch sequence of a gravity-based structure[J].Applied Ocean Research,1995,17(1):33-41.
[6]van Kessel J L F,Pinkster J A.The effect of aircushion division on the motions of large floating structures[C]//Proceeding of,26th International Conference on Offshore Mechanics and Arctic Engineering.San Diego,CA,USA,2007:677-686.
[7]Thiagarajan K P.Hydrostatic stability of compartmented structures supported by air cushions[J].Journal of Ship Research,2009,53(3):151-158.
[8]Ikoma T,Masuda K,Rheem C K,et al.Hydroelastic behaviors of VLFS supported by many aircushions with the three-dimensional linear theory[J].Journal of Offshore Mechanics and Arctic Engineering,2012,134:011104.
[9]别社安,赵冲久,及春宁,等.筒型基础海洋平台气浮拖航稳性分析[J].天津大学学报,2002,35(2):222-226.Bie Shean,Zhao Chongjiu,Ji Chunning,et al.Stability analysis of the bucket foundation platform transported by air floating[J].Journal of Tianjin University,2002,35(2):222-226(in Chinese).
[10]刘宪庆.气浮筒型基础拖航稳性和动力响应研究[D].天津:天津大学建筑工程学院,2012.Liu Xianqing.Study on Stability and Dynamic Response in Towing of Air-Floating Bucket Foundation[D].Tianjin:School of Civil Engineering,Tianjin University,2012(in Chinese).
[11]Thiagarajan K P,Morris-Thomas M T,et al.Heave and pitch response of an offshore platform with air cushion support in shallow water[C]//Proceedings of the 23rd International Conference on Offshore Mechanic and Arctic Engineering.Vancouver,Canada,2004:51469.
[12]Thiagarajan K P,Morris-Thomas M T.Wave-induced motions of an air cushion structure in shallow water[J].Ocean Engineering,2006,33(8):1143-1160.