【作者】 陈宇恒； 张峰； 潘晋； 许明财；

【Author】 CHEN Yuheng;ZHANG Feng;PAN Jin;XU Mingcai;Huazhong University of Science and Technology,School of Naval Architecture & Ocean Engineering;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology;Wuhan Lituo Bridge Protection Technology CO,LTD;

【机构】 华中科技大学船舶与海洋工程学院； 武汉理工大学船海与能源动力工程学院； 武汉力拓桥科防撞设施有限公司；

【摘要】 桥梁防船撞方案设计时,对于开阔水域、水深较大的情况采用,浮筒拦截系统具有较好的性价比,拦截效果也较好。本文根据内河航道防船撞等级要求,设计了由浮筒、锚链、锚碇、缆索组成浮筒的拦截系统。采用Ls-dyna利用非线性有限元软件建立了考虑流固耦合的浮筒拦截系统和船舶有限元模型,并模拟了船舶撞击拦截系统的动态过程,分析了不同船舶质量、速度、撞击点、锚碇数量等因素对拦截效果的影响。采用流固耦合方法考虑碰撞过程中流场的作用。结果表明所设计的拦截系统可以有效阻拦船舶从而有效保护桥梁;对于不同吨级的撞击船舶对锚链和缆索的受力影响不大,而锚碇的质量可以有效的减小船舶拦截距离。更多还原

【Abstract】 In the design of bridge ship collision prevention scheme,the pontoon interception system is adopted for open water and large water depth.The pontoon interception system has good cost performance and interception effect.In this paper,according to the requirements of ship collision prevention grade in inland waterway,the intercepting system consisting of buoy,anchor chain,anchorage and cable is designed.The pontoon interception system and ship finite element model considering fluid structure coupling are established by using Ls dyna and nonlinear finite element software,and the dynamic process of ship impact interception system is simulated,and the influence of different ship mass,speed,impact point,anchorage number and other factors on interception effect is analyzed.The fluid structure coupling method is used to consider the effect of the flow field in the collision process.The results show that the designed interception system can effectively block ships and protect bridges;The impact of different tonnage ships on the force of anchor chain and cable has little effect,and the mass of anchor can effectively reduce the interception distance of ships.更多还原