多自由度控制水下拖曳体水动力响应分析
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摘要
本文根据一种已提出的水下拖曳体三维水动力数学模型,利用FORTRAN语言重新编制计算程序,并通过与FLUENT软件对接实现水下拖曳系统六自由度的动态模拟。在该数学模型中,脐带缆的控制方程采用Ablow and Schechter模型,拖曳体的水动力状态由Gertler and Hargen六自由度运动方程来描述,拖曳体所受的水动力通过FLUENT软件求解N-S方程得到。计算结果表明:迫沉水翼、垂直尾翼控制都能比较灵活地控制水下拖曳体,这表明本文的数学模型和所采用的模拟方法能够比较准确地模拟出整个拖曳系统在拖曳过程中的动力响应状态。本文所提出的数值分析方法可以为水下拖曳体的研发和改进提供一种前期设计准备的数值手段。
In this paper,according an underwater towed vehicle 3D hydrodynamic mathematical model,and using FORTRAN language to program,and through docking FLUNT software to come true six-degrees-freedom dynamic simulation of underwater towed system.In the mathematical model.Ablow and Schechter model is used to the control equation of cable,and drag hydrodynamic state body is described by Gertler and Hargen six degree of freedom motion equation.In this study, the hydrodynamic were obtained by FLUENT software for solving N-S equation. The results indicate that: depressing airfoil, vertical airfoil control can flexibly control the underwater towed vehicle, which indicates that the simulation method and the mathematical model can accurately simulate the state of motion response of the whole towed system during the towing. Numerical analysis method proposed in this paper can be used for the development of underwater towed vehicle and provides a numerical method for preliminary design.
In this paper,according an underwater towed vehicle 3D hydrodynamic mathematical model,and using FORTRAN language to program,and through docking FLUNT software to come true six-degrees-freedom dynamic simulation of underwater towed system.In the mathematical model.Ablow and Schechter model is used to the control equation of cable,and drag hydrodynamic state body is described by Gertler and Hargen six degree of freedom motion equation.In this study, the hydrodynamic were obtained by FLUENT software for solving N-S equation. The results indicate that: depressing airfoil, vertical airfoil control can flexibly control the underwater towed vehicle, which indicates that the simulation method and the mathematical model can accurately simulate the state of motion response of the whole towed system during the towing. Numerical analysis method proposed in this paper can be used for the development of underwater towed vehicle and provides a numerical method for preliminary design.
引文
[1]Ablow,CM,and Schechter,S.,Numerical Simulation of Undersea Cable Dynamics,[J]Ocean Engineering,1983,10,(6):443-457.
[2]Gertler M,Hagen G L.Standard equations of motion for submarine simulation[R].Technical Report DTMB 2510,David Taylor Research Center,Washington,D.C.1967.
[3]陈健,吴家鸣,黄志科,马志权.一种三柱体水下拖曳体.中国,ZL 2013 20068578.1[P].2013-8-14.
[4]Wu JM,Chwang Allen T.A hydrodynamic model of a two-part underwater towed system[J].Ocean Engineering,2000,27(5):455-472
[5]李志印,吴家鸣.水下拖曳系统水动力特性的计算流体力学分析[J].中国造船,2007,48(2):9-19.
[2]Gertler M,Hagen G L.Standard equations of motion for submarine simulation[R].Technical Report DTMB 2510,David Taylor Research Center,Washington,D.C.1967.
[3]陈健,吴家鸣,黄志科,马志权.一种三柱体水下拖曳体.中国,ZL 2013 20068578.1[P].2013-8-14.
[4]Wu JM,Chwang Allen T.A hydrodynamic model of a two-part underwater towed system[J].Ocean Engineering,2000,27(5):455-472
[5]李志印,吴家鸣.水下拖曳系统水动力特性的计算流体力学分析[J].中国造船,2007,48(2):9-19.