浮式钢防撞箱受力性能数值分析
Numerical Simulation of Mechanical Performance for Anti-Collision Steel Pontoon
韩晓磊 1王博 1李伟东1
作者信息
- 1. 中国建筑第五工程局有限公司,湖南 长沙 410002
- 折叠
摘要
浮式钢防撞箱在船桥碰撞中具有良好的塑性吸能防撞性能.为探究影响防撞箱防撞性能的因素,该文基于有限元软件Ansys/LS-DYNA,建立了船‒防撞箱‒桥墩系统碰撞模型,对碰撞机理及过程进行数值模拟,探讨防撞箱与桥墩连接方式、尖舱尖角、防撞箱刚度等对桥墩所受撞击力的影响,提出撞击力曲线的三阶段划分方法.分析表明:浮式防撞箱内壁直接固结、与桥墩外壁耦合连接会降低撞击力,最大撞击力随着防撞箱与桥墩间距的增大而变大;防撞箱尖舱尖角宜取为80°～100°;防撞箱碰撞区钢板厚度存在一个最优值;最大撞击力随着非碰撞区钢板厚度的增大而变大,超过8 mm增大幅度降低.
Abstract
Anti-collision steel pontoon has good plasticity and energy absorption properties in ship-bridge collision.To explore the factors affecting the anti-collision performance of the anti-collision pontoon,a collision model composed of ship,anti-collision pontoon,and pier system was built based on finite element software Ansys/LS-DYNA.The collision mechanism and process were numerically simulated,and the effects of connection type between anti-collision pontoon and pier,peak angle of pontoon,and anti-collision pontoon stiffness on the collision force of the pier were investigated.The three-stage division method of collision force curve was put forward.The analysis shows that the fixed inwall of the anti-collision steel pontoon and connection to the pier surface can reduce collision force.The maximum collision force increases with the increase in distance between anti-collision pontoon and pier.The appropriate value range of the peak angle of the pontoon is 80°-100°.The steel plate thickness of the collision zone of the anti-collision pontoon has an optimal value.With the increase in steel plate thickness of the non-collision zone,the maximum collision force will increase,but the increase amplitude will decrease when it exceeds 8 mm.
关键词
船桥碰撞/浮式钢防撞箱/撞击力/防撞箱与桥墩连接方式/尖舱夹角/钢板厚度Key words
ship-bridge collision/anti-collision steel pontoon/collision force/connection type between anti-collision pontoon and pier/peak angle of pontoon/steel plate thickness引用本文复制引用
基金项目
中建股份科技研发项目(CSCEC-2021-Z-29)
出版年
2024
国家科技期刊平台
NSTL
万方数据