桥墩防撞导偏轮受撞后作用力及能量转换特性  

Acting forces and energy transformation characteristics of anti-collision idler pulley for bridge pier under colliding

作　　者：洪娟[1] 陈云鹤[1] 吴广怀[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2012年第3期330-335,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：江苏省交通科学计划资助项目(08Y13)

摘　　要：为了避免船舶直接撞击运河桥墩,设计了一种适用于京杭运河航道的新型桥墩防撞导偏轮设施。依据船桥碰撞相关理论,通过不同船型与该新型防撞导偏轮设施碰撞过程的三维数值模拟,对船舶和防撞导偏轮设施碰撞后的作用力、能量转换及主要构件的碰撞损伤等特性进行了深入分析和评估。结果表明,该设施延长了撞击作用时间,可较好地保护碰撞船舶及桥墩,能够满足京杭运河桥墩防撞要求,并具有易更换、占地小和吸能效果明显的优点,适用于不同水深、流速、桥位的情况,可为内河桥墩防撞设计提供参考。To avoid the loss from the direct collision between ships and bridge piers, a new anti-collision de- vice of idler pulley was studied and designed to satisfy the characteristics such as the narrow channel of the Grand Canal. According to the relative ship-birdge collision theories, the acting forces, energy transforma- tion characteristics and main components＇ collision damages during the colliding course between different types of ships and the new anti-collision device were analyzed and evaluated by 3D numerical simulation. The results indicate that the new device can prolong the collision acting time, protect both the ship and birdge pier and meet the anti-collision requirements for the bridge piers on the Grand Canal, which posses- ses the advantages such as easy replacing, little occupying area and obvious energy dissipating effect, and can be applied under different water depth, flow velocities and bridge positions. This new device can also provide a reference for the anti-collision design of canal bridges.

关 键 词：京杭运河 桥墩防撞 导偏轮 数值仿真 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]