高性能可移动钢护栏设计及碰撞仿真研究

Study on Design of Movable Steel Guardrail with High Performance and Collision Simulation

依托经实车碰撞试验验证、防护等级满足A级的高性能金属护栏,开发了一种安装拆移简便、具备良好复用性和回收性、可作为永久或临时综合利用的高性能可移动钢护栏。在不改变原有护栏的受力结构基础上,优化护栏的安装、连接细部构造,在护栏的底部设置活动滚轮,便于转运。运用有限元软件对优化后的护栏进行碰撞仿真模拟,验证其防护性能仍满足A级。

A movable metal guardrail was developed based on an existed guardrail which has been verified up to standard of Grade A in protection level by real vehicle crash test.The new movable guardrail could be utilized comprehensively as permanent or temporary facilities with many merits including convenience of installation and removal,and good crashworthiness,reusability and recycling.The structure of guardrail connection parts was optimized retaining the original stressed structure.The wheel combination was installed at the bottom of the guardrail,which made the guardrail movable as a temporary facility.A collision simulation experiment of the optimized guardrail was conducted based on finite element model(FEM)to ensure that meet Grade A.