摘要
水中悬浮隧道遭受突发撞击时,管体强度变化、系统可靠性以及结构动力响应十分复杂,针对悬浮隧道受到撞击后能否继续安全运营的不确定性,应用有限元对悬浮隧道损伤与运动响应进行模拟是一种非常有效的方法。本文采用ABAQUS开展了撞击作用下悬浮隧道响应数值分析,构建了有限元模型;确定了模型材料及各部分单元类型;提出了管节接头的处理方式,探究了不同悬浮隧道截面形状及锚索布置方式对结构灾变的影响机制。研究结果表明:四边形截面隧道管体受撞击后管体的位移和损伤最小,是抵抗冲击最佳的形式。锚索布置方式不会影响悬浮隧道的撞击应力、应变及损伤,仅影响悬浮隧道的运动响应,其中两垂直两倾斜的系泊方式可显著限制悬浮隧道的撞击运动幅度。
When a submerged floating tunnel in water is suddenly impacted,the changes in pipe strength,system reliability,and structural dynamic response are very complex.To address the uncertainty of whether a suspended tunnel can continue to operate safely after being impacted,the application of the finite element method to simulate the damage and motion response of the suspended tunnel is very effective.This paper uses ABAQUS to conduct nu-merical analyses of the response of suspended tunnels under impact,constructs a finite element model,determines the model materials and element types of each part,proposes a treatment method for pipe joints,and deeply ex-plores the influence mechanism of different suspended tunnel section shapes and anchor cable arrangements on structural disasters.The research results indicate that the displacement and damage of the quadrilateral cross-sec-tion tunnel tube after impact are minimal,and it is the best form to resist impact.The arrangement of anchor cables does not affect the impact stress,strain,and damage of the suspended tunnel but only affects the motion response of the suspended tunnel.The two vertical and two inclined mooring methods can significantly limit the impact motion amplitude of suspended tunnels.
作者
徐万海
沙沐
李明鎏
李航
XU Wanhai;SHA Mu;LI Mingliu;LI Hang(State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300072,China)
出处
《哈尔滨工程大学学报》
北大核心
2025年第7期1268-1278,共11页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(U2106223,51979163)。
关键词
水中悬浮隧道
撞击载荷
锚索布置方式
截面形状
数值模拟
动力响应
结构损伤
应力分析
submerged floating tunnel(SFT)
impact load
anchor cable arrangement
cross-sectional shape
nu-merical simulation
power response
structural damage
stress analysis
