运河桥梁浮式防船撞设施的模拟计算

为了避免船舶与桥墩的直接碰撞,达到既保护桥墩安全又保护船舶安全的目的,根据苏南运河桥梁防撞设计的特殊要求,利用船和防撞设施碰撞中走锚、浮体移动和锚链拉伸过程来消耗船舶动能的柔性浮式防撞原理,提出了桥墩防船撞设施方案;基于有限元分析软件ANSYS/LS-DYNA,建立了一艘1000 t级货船与防撞设施的碰撞模型,分析了撞击力、能量转换的特点和规律,并与船舶和桥墩直接碰撞的结果作比较,研究了浮式防船撞设施的工作效能.结果表明,浮式防船撞设施能够满足桥墩防撞要求,可为运河桥梁防撞设计提供参考.

Smi ulat ion calculation o f floating-fac ility for ant i-co llis ion between ship and br idge over cana l

To avo id d irect co llision be tw een the sh ip and the pie r and to ensu re the secur ity o f bo th the sh ip and the p ier, a schem e o f the an ti-co llision facility betw een the sh ip and the bridge w as in t rodu ced acco rding to the specia l requ irem en ts o f an ti-co llision design o f Sunan C ana l br idge based on the theo ry o f dep le ting k inet ic energy o f sh ip du ring ancho rsm o vem en t, the f loa ting-body m obile and the cab les pu ll ex tenso r p ro cess. A lso, depend ing o n the f inite e lem en t ana ly sis so f tw a reAN SYS /LS-DYNA, a co llision m odel o f a class 1000t carg o and the an ti-co llision facility w ere set up to ana ly ze the im pact fo rce, the character ist ics and the law o f ene rgy conve rsion in d irect co llision be tw een the sh ip and the an ti-co llision facility. T he resu lt w as com pared w ith tha t o f the co llision be tw een sh ip and p ier to study the perfo rm ance o f the f loa ting an t i-co llisio n facility. T h e study show s tha t the an t i-co llision f lo at ing facility m eet s the ant i-co llision requ irem ent s o f the pie r, w h ich m ay pro v ide a reference fo r an t i-co llision design o f b ridg es ov er Jing-H ang G rand cana l