双船联合举升多体协同作业系统横摇稳性评估

基于ADAMS平台,构建特定场景双船联合举升多体协同作业系统虚拟样机,对新型一体化拆解作业双船联合举升过程中待拆除组块横摇稳性进行预测与评估。构建了该系统拓扑模型,使用几何参数描述系统中上部组块横摇运动特征；通过虚拟样机仿真探究了双船不同耦合运动情况时上部组块最危险失稳状态,并分析了上部组块重心至连接点连线垂直距离与水平距离比值对横摇角度的影响规律。结果表明:物理模型试验数据驱动的虚拟样机技术可以有效评估该系统运动特征,与几何拓扑模型得到的上部组块横摇失稳角度理论公式计算结果吻合；双船同相位横摇与反相位垂荡耦合运动时对上部组块横摇稳性影响最大；待拆除上部组块横摇失稳时的极限纵横比可以作为复杂多体系统横摇稳性评估参数,为实际工程方案选择提供参考。

Rolling stability evaluation of multi-body collaborative operation system for the twin-ship joint lifting

Based on the automatic dynamic analysis of mechanical systems (ADAMS), a virtual prototype of a multi-body collaborative operation system for the twin-ship joint lifting in specific scenarios is constructed to predict and evaluate the roll stability of the blocks to be removed during the new integrated dismantling operation of twin-ship joint lifting. The topological model of the system is constructed, and geometric parameters are used to describe the rolling motion characteristics of the topside in the system. Through the virtual prototype simulation, the most dangerous instability state of topside under different coupling motions of two vessels is explored, and the influence law of the ratio of vertical distance and horizontal distance from the center of gravity of topside to the connection point on the rolling angle is given. The results show that the test data-driven virtual prototype technology can effectively evaluate the motion characteristics of the topside in the complex multi-body system, which is consistent with the theoretical formula of the rolling instability angle of the topside obtained from the geometric topology model. The coupling motion of the two vessels at the same phase rolling and anti-phase heave has the greatest influence on the rolling stability of the topside. The ultimate aspect ratio of the topside obtained by the virtual prototype simulation can be used as the rolling stability evaluation parameters of the multi-body system, and provide a reference for the selection of engineering schemes.