SAm级防撞活动护栏碰撞仿真分析  

Collision Simulation Analysis of SAm Movable Guardrail

作　　者：崔洪军 李思学 朱敏清 李霞 Cui Hongjun;Li Sixue;Zhu Minqing;Li Xia(School of Civil and Transportation,Hebei University of Technology,Tianjin 300401,China;School of Architecture&Art Design,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北工业大学建筑与艺术学院,天津300401

出　　处：《系统仿真学报》2021年第1期141-148,共8页Journal of System Simulation

基　　金：国家自然科学基金(51678212);河北省科技东奥专项(19970808D);河北省自然科学基金(E2019202449);河北省软科学研究专项(20557672D)。

摘　　要：针对目前高速公路中央分隔带开口处活动护栏防撞等级较低的问题,提出了一种SAm级混凝土活动护栏及一种新型连接装置。基于有限元的方法,建立车辆与护栏的碰撞模型,通过LS-DYNA对车辆与护栏碰撞过程进行求解,根据不同车型的碰撞结果分别在缓冲,阻挡和导向性能上对护栏的安全性能进行评价,其中小型车辆与护栏碰撞后的OIV(Occupant Impact Velocity)值<12 m/s,ORA(Occupant Ridedown Acceleration)值<20 g且车辆没有驶出导向框;大型车辆与护栏碰撞后没有发生穿越、骑跨等现象且车辆没有驶出导向框,均满足护栏安全性能评价标准。Aiming at the problem of low anti-collision grade of the movable guardrail at the opening of the central divding belt of the expressway, a SAm-level concrete movable guardrail and a new connecting device are proposed. Based on the finite element method, the collision model between the vehicle and the guardrail is established, and the collision process is also calculated by LS-DYNA. According to the collision results of different vehicle types, the safety performance of the guardrail is evaluated in terms of cushioning, blocking and guiding performance. The OIV value is less than 12 m/s for small vehicles’ collision with the guardrail, and the ORA value is less than 20 g and the vehicle does not drive out of the guide frame. No crossing or straddling occurred and the vehicle does not drive out of the guide frame after collision between the large vehicle and the guardrail.

关 键 词：活动护栏 防撞能力 仿真模拟 评价分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] U417.1+2[自动化与计算机技术—计算机科学与技术]