摘要
基于弯矩平衡方程和有限元离散单元法建立拖缆离散动力学模型,通过对拖缆离散方程组线性化处理,将非线性动力学方程转化为关于求解角度的线性问题。设定缆绳初始形态,通过时间迭代对方程求解得到拖曳系统稳定运动形态。母船在海面会发生升沉运动,由于母船垂荡运动对水下拖缆的耦合影响,拖曳系统稳定形态受到破坏,拖缆受力发生改变,系统可能处于危险状态。考虑母船垂荡运动的耦合效应,通过MATLAB对拖曳系统进行仿真计算,得到拖缆的运动参数和受力响应情况,为拖曳系统在实际作业中提供参考。
The discrete cable dynamics model is established in the paper based on the bending moment balance and FEM discrete element method.By the discrete linearization processing,the nonlinear dynamics problem is transformed into linear equations about angle accelerations.The towing system stable configuration is obtained by solving the linear equations via time iteration with the initial state of the towed cables.In the case of heave motion of the mother ship which has coupling influence on the underwater towed cables,the cable steady state will be disturbed and the towed forces will change so that the system may be in danger.Considering the impacts of random waves on the mother ship,the motion parameters and tension response of the cable are gained by MATLAB simulation calculating the towing system.The results offer references to the towed systems in real operations.
出处
《船舶工程》
北大核心
2013年第S1期28-31,51,共5页
Ship Engineering
关键词
动力响应
垂荡运动
数值计算
拖缆
dynamic response
heave motion
numerical calculation
towed cables
