Synchronous Effect of Slipping Heavy Loads on a Ro-Ro Ship Rolling in Waves
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摘要: 由于波浪和内部滑动车辆共同作用，使滚装船的横摇加剧，这是许多滚装船发生倾覆的重要原因之一．对由滚装船和多辆滑动车辆组成的浮基多体系统，取滚装船的横摇角和多辆自由滑动车辆在甲板上的横向位移为此系统的自由度，通过对船舶在波浪中所受表观重力和表观浮力的分析，导出波浪作用力矩，运用多体系统动力学方法，建立了系统的动力学方程．以某型海峡滚装渡轮为例，对在多辆车自由滑动和波浪共同作用下的滚装船浮基多体系统的横摇响应和车辆位移响应进行了数值计算，得出了多个自由滑动的重载荷因相互碰撞在舷侧舱壁的约束下随着时间的延长其运动将趋于同步的结论．Abstract: Common effect of wave and slip of internal vehicles will make rolling of the roll-on ship serious. This is one of the important reasons for overturn of ro-ro ships. The multibody system with a floating base is composed of ro-ro ship and slipping vehicles. The rolling angle of the ship and the transverse displacements of the slipping vehicles on desk are taken as freedoms. Making use of the analysis of apparent gravitation and apparent buoyancy, the wave rolling moment is derived. By means of dynamic method of multibody system, dynamic equations of the system are established. Taking a certain channel ferry as an example, a set of numerical calculation hase been carried out for rolling response of the multibody system with a floating base of a ro-ro ship and displacements response of the slipping vehicles under common effect of free slipping vehicles and wave, and a conclusion has been drawn that the motion of the numerous free slipping heavy loads will trend to be synchronous under restraining of the side-wall bulkhead with time because of repeated collision.
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Key words:
- Ro-Ro ship /
- slipping heavy loads /
- floating base /
- multibody system /
- synchronous effect /
- dynamics
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