船用柔性绳索收绞的过程仿真

摘要

针对航海领域相关仿真系统中尚未涉及绞缆机收绞缆绳的模拟过程,以及柔性绳索收绞时的碰撞检测会产生不稳定现象的问题,采用改进的结构-弯曲弹簧模型模拟柔性绳索并进行三维可视化,提出一种改进的圆柱螺旋线算法.通过预先计算出绳索每一个质点在卷筒上的位置坐标,并在收绞时为即将绞上卷筒的绳索质点位置赋值,调整质点间的朝向和旋转角度以避免出现不正常扭曲现象.通过使用卷筒收绞缆绳和锚链的仿真实验对算法的可靠性和通用性进行了验证.%In view of the problems that the process simulation of the flexible rope winding on the roller is not yet involved in the marine related simulation system, and due to the collision detection of winching the flexible rope will produce instability phenomenon, the rope was simulated by the structure-bending spring model and the 3D visualization was performed.A kind of circular helix improved algorithm was put forward.By pre-calculating the position of rope particle in the roller, setting the position to the particles which will be twisted to the roller, and adjusting the particle orientation and rotation angle, the abnormal distortion phenomenon can be avoided.Through the simulation process using the drum to winding the cables and anchor chain, the proposed method is verified to be correct and universal.