An impact dynamics analysis on a new crashworthy device against ship–bridge collision
An impact dynamics analysis on a new crashworthy device against ship–bridge collision
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DOI：
10.1016/j.ijimpeng.2007.12.005
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发表时间：
2008-08
影响因子：
5.1
通讯作者：
Lili Wang;Liming Yang;Dejin Huang;Zhongwei Zhang;Guoyu Chen
中科院分区：
文献类型：
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作者：
Lili Wang;Liming Yang;Dejin Huang;Zhongwei Zhang;Guoyu Chen
为了避免日益严重的船桥碰撞事故，研制了一种新型的柔性消能耐撞装置，该装置主要由数百个钢丝绳线圈串联而成。试验表明，SWRC的力-位移行为是率相关的、耗能的，本文用ZWT非线性粘弹性关系成功地模拟了这一点。将动力有限元程序与SWRC的力-位移模型相结合，对几种典型的船桥碰撞情况进行了动力数值模拟。结果表明，由于SWRCs的高柔度(低波阻抗)和粘性耗能特性，冲击力峰值明显降低。特别是，新的装置使船舶有足够的时间转向，因此船舶的初始动能很大比例由转向的船舶携带。
In order to avoid increasingly serious accidents caused by ship–bridge collision, a new flexible, energy-dissipating crashworthy device is developed, which essentially consists of hundreds of steel-wire-rope coil (SWRC) connected in parallel and series. Experiments show that the force–displacement behavior of the SWRC is rate-dependent and energy dissipating, which is successfully modeled by the ZWT nonlinear visco-elastic relation in the present paper. By using the dynamic finite-element code incorporated with the force–displacement model of the SWRC, dynamic numerical simulations are performed for several typical cases of ship–bridge collision. The results indicate that the peak of impact force markedly decreases due to high compliance (low wave impedance) and viscous energy dissipation characteristic of SWRCs. Particularly, the new device enables the ship having enough time to turn its navigating direction away and consequently a large percentage of initial kinetic energy of ship is carried by the turning-away ship.