上海交通大学学报

上海交通大学学报（自然版）

• 天文学、地球科学 • 上一篇    下一篇

低速低应力时拖揽运动仿真

王飞，陈锦标，涂兴华   

  1. (上海海事大学 商船学院， 上海 200135)
  • 收稿日期:2009-06-01 修回日期:1900-01-01 出版日期:2010-06-30 发布日期:2010-06-30

Numerical Simulation of Towed LowTension Cable

WANG Fei,CHEN Jingbiao,TU Xinghua   

  1. (Merchant Marine College, Shanghai Maritime University, Shanghai 200135, China)
  • Received:2009-06-01 Revised:1900-01-01 Online:2010-06-30 Published:2010-06-30

摘要： 建立了拖缆在低速低(负)应力时的运动数学模型，用以分析弯矩对拖缆运动的影响.基于集中质量法给出了三维拖缆的运动控制方程，在此基础上根据弯矩和分布荷载的对应关系，提出了一种计算弯矩诱导分布荷载的方法，并将该荷载融入到运动控制方程中，采用四阶龙格库塔方法进行积分求解.通过数值仿真计算，分析了低速时计入弯矩影响前、后拖缆的运动响应，并给出了合理准确的结果.结果表明，所提方法是切实可行的.

关键词: 水下拖缆, 边界条件, 弯矩影响, 数值模拟

Abstract: This paper developed a mathematical model to investigate the dynamics of low(negative)tension cable, in which bending moment plays an important role in cable dynamics. Lumped mass method(LMM) was employed to describe the cable dynamics, a new three dimensional scheme was proposed to compute the bending momentinduced load from the relationship between moment and distributed load, which was then incorporated into the governing equation of LMM, the equation was solved by the 4th order RungeKutta integrating procedure. Numerical cases were presented for lowspeed towing, which illustrate that the effect of bending moment can not be neglected in order to get reasonable result, and also validate the proposed scheme.

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