低速低应力时拖揽运动仿真

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.

Numerical Simulation of Towed Low Tension Cable

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.