连接索链弹性模量对防撞系统能量转换的影响

来源 :交通运输工程学报 | 被引量 : 0次 | 上传用户:axian190
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为了研究船舶与柔性浮式防撞系统碰撞过程中能量的转换关系,分析了连接索链弹性模量对系统消能作用的影响。在对数值计算模拟条件做出合理假设的前提下,基于能量守恒原理,模拟了船舶撞击柔性浮式防撞系统的运动过程,分析了不同连接索链弹性模量条件下重力锚位移的变化规律。基于位移相似与能量等量原则,建立了2种数学模型,比较了数值计算结果与试验结果的差异。分析结果表明:连接索链弹性模量衡量了其变形程度,是影响撞击过程中船舶动能转化为弹性势能的重要因素;在相同条件下,连接索链的弹性模量越大,连接索链越不易发生形变,船舶撞击系统过程中转化为弹性势能的动能就越小,转化为重力锚摩擦内能的动能就会越大,各重力锚的锚位移就会越大;通过数值计算结果与模型试验结果的比较,模型试验中连接索链的弹性模量为260GPa比较合适;在保证连接索链不发生断裂的前提下,索链的选取直接影响系统走锚的位移,从而影响柔性浮式防撞系统的拦阻效果。 In order to study the energy conversion relationship between the ship and the flexible floating collision avoidance system during the collision, the influence of the elastic modulus of the connecting cable chain on the system energy dissipation was analyzed. On the premise of reasonable assumptions of numerical simulation conditions, based on the principle of energy conservation, the motion of the ship against the flexible floating collision avoidance system is simulated and the variation of the gravity anchor displacement under different elastic modulus of the connecting chain is analyzed . Based on the principle of displacement similarity and energy equivalence, two mathematical models were established, and the differences between numerical calculation and experimental results were compared. The analysis results show that the elastic modulus of the cable chain is a measure of its deformation and is an important factor that affects the kinetic energy of the ship to be transformed into the elastic potential energy during the impact. Under the same conditions, the greater the elastic modulus of the cable chain, The kinetic energy transformed into the elastic potential energy during the collision of the ship with the system is smaller and the kinetic energy of the internal energy transformed into the gravitational anchor friction will be larger and the anchor displacement of each gravity anchor will be greater. By comparing the numerical results with the model The comparison of the test results shows that it is more suitable for the elastic modulus of the connecting cable chain to be 260 GPa in the model test. Under the premise of ensuring that the connecting cable chain does not break, the selection of the cable chain directly affects the displacement of the anchorage system, Hit the system blocking effect.
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