基于船-桥碰撞接触时间的船撞力简化计算方法

发布时间：2018-04-25 22:16

本文选题：船-桥碰撞 + 接触时间　；参考：《建筑科学与工程学报》2016年04期

【摘要】：通过数值模拟初步分析了不同吨位船舶撞击代表性桥梁工程的接触时间,根据船-桥碰撞动力学模型得出了船撞力和接触时间的理论解;分析了船舶质量、初始撞击速度、船艏刚度以及桥墩刚度等参数对碰撞接触时间的影响,拟合出碰撞接触时间的简化计算公式,并通过实际船-桥碰撞工程的数值模拟对简化计算公式进行了验证,从而修正了中国《公路桥涵设计通用规范》中关于漂浮物撞击桥梁的碰撞接触时间的定义;基于冲量定理分析了船-桥碰撞接触时间与峰值船撞力的关系,研究了船撞力时程曲线与正弦波和三角波的关系,并与数值模拟结果进行了对比分析,建立了峰值船撞力简化计算公式。结果表明:船-桥碰撞接触时间与船舶质量和接触刚度有关;峰值撞击力计算值与数值模拟结果吻合较好。
[Abstract]:Through numerical simulation, the contact time of representative bridge engineering with different tonnage is analyzed, the theoretical solution of ship collision force and contact time is obtained according to the ship-bridge collision dynamics model, and the ship mass, initial impact velocity, and the initial impact velocity are analyzed. The influence of ship bow stiffness and pier stiffness on the collision contact time is obtained. The simplified calculation formula of collision contact time is fitted, and the simplified calculation formula is verified by the numerical simulation of actual ship-bridge collision engineering. In this paper, the definition of collision contact time of floating objects against bridge is revised, and the relation between collision contact time of ship and bridge and peak ship collision force is analyzed based on impulse theorem. The relationship between ship collision time history curve and sinusoidal and triangular waves is studied, and a simplified formula for calculating peak ship collision force is established by comparing with the numerical simulation results. The results show that the contact time of ship-bridge collision is related to ship mass and contact stiffness, and the calculated value of peak impact force is in good agreement with the numerical simulation results.
【作者单位】：南京工业大学土木工程学院;中铁大桥勘测设计院集团有限公司;
【基金】：江苏省高校自然科学研究重大项目(12KJA580002) 江苏省“六大人才高峰”项目(JZ-006)
【分类号】：U447;U676.1

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