非通航孔桥梁防船舶撞击新型拦阻技术

New Type of Ship Arresting Technique for Protecting Non-Navigable Span Bridges Against Colliding

针对现有非通航孔桥梁防船撞技术的不足,提出适用于江海长桥非通航孔桥梁防船撞的新型自适应、恒阻力船舶拦阻技术。自适应、恒阻力船舶拦阻系统由系泊趸船、系泊锚链和混凝土沉块、自适应浮筒、高强度拦阻网、触发钢索以及恒阻力耗能装置组成,其工作原理为:偏航船舶撞击拦阻系统后,自适应浮筒带动拦阻网从水平状态竖起展开,包裹住来撞船首,再通过恒阻力耗能装置吸收船舶动能,拦截住船舶。通过缩尺比模型试验和实船撞击试验模拟该系统拦截船舶的过程,验证了该系统的可行性及工程设计的可靠性;采用水动力计算软件ANSYS-AQWA进行全尺寸数值仿真,仿真结果与试验结果基本一致。

In view of the deficiency of the existing techniques for protecting the non-navigable span bridges against ship colliding,a new type of the self-adaptive and constant resistance ship arresting technique applicable to the ship colliding protection of the non-navigable span bridges of the long bridges over the rivers and sea has been developed.The ship arresting system in the new technique is comprised of the mooring barges,mooring anchor chains,concrete sinking blocks,selfadaptive pontoons,high-strength arresting net,touching-off steel cable and the constant resistance energy dissipation devices.The working principle of the system is that at the time the yawing ship collides with the arresting system,the pontoons start to drive the arresting net in the horizontal state to rise up and unfold and the net wraps the bow of the coming ship.The energy dissipation devices then start to absorb the kinetic energy of the ship and the ship is arrested.The simulation of the ship arresting process of the system through the scale-down model tests and the real ship impact tests verifies the feasibility of the system and the reliability of the design.The full scale numerical simulation of the system using the hydrodynamics calculation software ANSYS-AQWA shows that the results of the simulation are basically consistent with those of the tests.