计及空气介质的水下拖曳系统运动模型及其数值计算

A dynamics model and numerical simulation of underwater towed system taking into account the effect of air

为进一步提高水下拖曳系统运动仿真的准确性,本文建立了计及空气介质的拖曳系统运动模型,并提出了改进的有限差分方法来保证数值计算时的稳定性。仿真和试验表明,考虑空气介质后将进一步改善拖曳张力和缆形的计算精度,以及提高对双拖安全性分析的准确性。

In order to effectively and accurately calculate the dynamic motions of underwater towed system,this paper constructs a dynamics model taking into account the effect of air,and develops a modified finite difference method to produce accurate,stable solutions for numerical simulation.Both numerical results and experimental data show that the model is more accurate in calculating the motion and tension of underwater towed cables and more trusty in predicting the security of two-towed system.