CAJ | 학술논문

桥梁在船舶碰撞时受到的动力载荷和响应是复杂的动力非线性问题.近代非线性有限元技术为该问题的求解提供了有效的工具.本文简述了该技术的基本原理,并基于整船整桥模型,对一艘4万吨实船与桥梁的碰撞过程进行了计算.仿真结果显示了船艏结构损坏、碰撞力演变、能量传递和桥墩内部应力变化的详细情景,讨论了船-桥碰撞的力学特征.本文演示的方法比传统的经验公式和简化解析法提供了更为精确的结果.所提供的桥墩应力状态对桥梁的设计与碰撞后的损伤评估有重要参数价值.
교량재선박팽당시수도적동력재하화향응시복잡적동력비선성문제.근대비선성유한원기술위해문제적구해제공료유효적공구.본문간술료해기술적기본원리,병기우정선정교모형,대일소4만둔실선여교량적팽당과정진행료계산.방진결과현시료선수결구손배、팽당력연변、능량전체화교돈내부응력변화적상세정경,토론료선-교팽당적역학특정.본문연시적방법비전통적경험공식화간화해석법제공료경위정학적결과.소제공적교돈응력상태대교량적설계여팽당후적손상평고유중요삼수개치.
It is difficult to accurately calculate the collision force and nonlinear response of bridge duringship - bridge collision. Based on the FE model of the whole ship and bridge, A 40000 t DWT oil tanker withbulb bow head - on colliding with bridge across yangzi River was simulated by dynamic nonlinear finite ele-ment approach. The technology of modeling structures and deciding the related parameters was emphaticallyintroduced. The history and property of bow damage, the collision force, the energy transform and the stressdistribution in bridge tower were presented and discussed, which is of great value to bridge design andbridge damage estimation. Some mechanical characters during ship bridge collision process were ob-tained. Compared with those by empirical formulas and simplified analytical method, nonlinear finite elementmethod can get more accurate results.