F型与单坡型护栏在车辆撞击下的仿真研究

Simulation of F-shape Concrete Barrier and Single Slope Concrete Barrier under the Vehicle Collision

为了对比研究A类防撞等级的F型混凝土护栏与单坡型混凝土护栏的防撞性能,基于动态显式有限元法采用Hyperworks和LS-DYNA软件,采用重型及轻型两种车辆类型,建立了4组车辆—护栏的系统碰撞动力学仿真模型。从沙漏控制及质量缩放证实了仿真结果的可靠性,然后从防撞性能、导向性能及安全性能方面进行了分析,探讨了两种混凝土护栏形式的综合性防撞性能。

In order to study the crashworthiness of the A anti-collision grade concrete barriers of F-shape and Single-slope type,four dynamic simulation models of vehicle-guardrail collision systems were set up,which were based on dynamic explicit finite element method （fem）using Hyperworks and LS-DYNA software.In four simulation models both heavy and light vehicles were used.The reliability of the simulation results were confirmed by hourglass technology and mass scaling method.Then the comprehensive crashworthiness of two types’concrete guardrails were analyzed in the aspects of anti-collision performance,guiding performance and safety performance.