纤维系缆动刚度特性研究
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摘要
随着海洋油气开发向深海转移,新型绷紧式系泊系统凭借其在深水应用中表现出的诸多优越性而倍受关注。文中对聚酯纤维系缆的应力应变关系进行了考查,基于弹性模量的经验公式,推导出无量纲的动刚度计算公式,采用误差控制的迭代求值方式求解单根系缆动刚度。该理论计算方法较之于有限元数值计算方法更简洁快速。选取了一座工作水深为1 500 m的新型单柱式(Spar)平台,计算系泊系统单根系缆的动刚度和张力,并与有限元计算结果进行对比,二者非常吻合。
As the exploitation of oil and gas resources gradually moves into deep water, close attention is paid to the taut-wire mooring system due to its enormous advantages in deep water application. This paper investigates the stress-strain relationship of the polyester fiber cable, and deduces a dimensionless formula to calculate the dynamic stiffness based on the empirical formula of the dynamic elastic modulus. The dynamic stiffness of the single fiber cable is calculated by an iterative procedure controlled by tolerable error. This theoretical calculation method is simpler and more efficient than the finite element method. Take a Spar platform operated in 1 500 meters water depth as an example, the dynamic stiffness and tension of a single fiber cable in the mooring system are calculated, which are in good agreement with the results from the finite element method.
As the exploitation of oil and gas resources gradually moves into deep water, close attention is paid to the taut-wire mooring system due to its enormous advantages in deep water application. This paper investigates the stress-strain relationship of the polyester fiber cable, and deduces a dimensionless formula to calculate the dynamic stiffness based on the empirical formula of the dynamic elastic modulus. The dynamic stiffness of the single fiber cable is calculated by an iterative procedure controlled by tolerable error. This theoretical calculation method is simpler and more efficient than the finite element method. Take a Spar platform operated in 1 500 meters water depth as an example, the dynamic stiffness and tension of a single fiber cable in the mooring system are calculated, which are in good agreement with the results from the finite element method.
引文
[1]DEL VECCHIO,MENICONI L C.Light Weight Materials for Deep Water Moorings[D].Reading:University of Reading,1992.
[2]KIM M S.Dynamic simulation of polyester mooring lines[D].Houston:Texas A&M University,2004.
[3]BOSMAN R L M,HOOKER J.The elastic modulus characteristics of polyester mooring ropes[A].In:Offshore Technology Conference[C].Houston,1999.40-44.
[4]黄维,刘海笑.新型深水系泊系统非线性循环动力分析[J].海洋工程,2010,28(2):22-28.
[5]袁梦.深海浮式结构物系泊系统的非线性时域分析[D].上海:上海交通大学,2011.
[6]林诚鑫.深水系缆的动刚度特性研究及系泊分析[D].天津:天津大学,2012.
[7]刘海笑,黄泽伟.新型深海系泊系统及数值分析技术[J].海洋技术,2007,26(2):6-10.
[8]潘斌,高捷,陈小红,等.浮标系泊系统静力计算[J].重庆交通学院学报,1997,16(1):68-73.
[9]KENNETH R B.Dynamic Modeling of Nylon and Polyester Double Braid Line[J].Oceans Engieering and the Environment,1985,17:1344-1353.
[10]FERNANDES A C,DEL V,CASTRO G A V.Mechanical properties of polyester mooring cables[J].International Journal of offshore and polar Engineering,1998,9(3):248-254.
[2]KIM M S.Dynamic simulation of polyester mooring lines[D].Houston:Texas A&M University,2004.
[3]BOSMAN R L M,HOOKER J.The elastic modulus characteristics of polyester mooring ropes[A].In:Offshore Technology Conference[C].Houston,1999.40-44.
[4]黄维,刘海笑.新型深水系泊系统非线性循环动力分析[J].海洋工程,2010,28(2):22-28.
[5]袁梦.深海浮式结构物系泊系统的非线性时域分析[D].上海:上海交通大学,2011.
[6]林诚鑫.深水系缆的动刚度特性研究及系泊分析[D].天津:天津大学,2012.
[7]刘海笑,黄泽伟.新型深海系泊系统及数值分析技术[J].海洋技术,2007,26(2):6-10.
[8]潘斌,高捷,陈小红,等.浮标系泊系统静力计算[J].重庆交通学院学报,1997,16(1):68-73.
[9]KENNETH R B.Dynamic Modeling of Nylon and Polyester Double Braid Line[J].Oceans Engieering and the Environment,1985,17:1344-1353.
[10]FERNANDES A C,DEL V,CASTRO G A V.Mechanical properties of polyester mooring cables[J].International Journal of offshore and polar Engineering,1998,9(3):248-254.