摘要
为了有效保障公路施工作业区内的人员和设备的安全,提出了一种新型可移动组合式护栏结构(以下简称新型护栏)。基于长短期记忆网络模型和非支配排序遗传算法,研究了新型护栏的关键参数;采用有限元模拟和足尺实车碰撞试验,分析了新型护栏的防撞性能。研究结果显示:优化后新型护栏底座摩擦因数取值为0.583,新型护栏高度取值为1014.27 mm;与传统的混凝土护栏、波形梁护栏相比,新型护栏的缓冲效果较优,表现在碰撞后的加速度值较小、车辆侧倾值较小;通过足尺实车碰撞试验的结果,验证了有限元模拟的有效性。新型护栏的防撞性能可满足A级的要求,对于公路施工作业区安全设施的设计具有参考意义。
To effectively ensure the safety of personnel and equipments within highway construction zones,a novel movable assembled guardrail structure was proposed.The key parameters of this guardrail structure were investigated based on the long short-term memory network model and the non-dominated sorting genetic algorithmⅡ.The crashworthiness of the guardrail structure was analyzed using finite element numerical simulations and full-scale vehicle crash tests.The research results indicate the optimized guardrail base has a friction coefficient of 0.583,and the optimized guardrail height is set at 1014.27 mm.Compared to traditional concrete guardrails and W-beam guardrails,the movable assembled guardrail offers superior cushioning effects,as it is evidenced by lower post-collision acceleration values and reduced vehicle rollover values.The effectiveness of the finite element simulation was validated through the results of full-scale vehicle crash tests.The crashworthiness of the guardrail meets the requirements of grade A,providing valuable insights for the design of safety facilities in highway construction zones.
作者
孟云伟
陈卓楚
王子骁
张引
安旭
刘中帅
青光焱
廖红玲
MENG Yunwei;CHEN Zhuochu;WANG Zixiao;ZHANG Yin;AN Xu;LIU Zhongshuai;QING Guangyan;LIAO Hongling(Intelligent Integrated Traffic Key Laboratory of Chongqing,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;China Merchants Chongqing Communications Technology Research&Design Institution Co.,Ltd.,Chongqing 400067,China;China Merchants Roadway Information Technology(Chongqing)Co.,Ltd.,Chongqing 400067,China;Shenzhen Sunzedo Highway Engineering Co.,Ltd.,Shenzhen 518000,China)
出处
《振动与冲击》
2025年第18期26-34,共9页
Journal of Vibration and Shock
基金
国家重点研发计划(2022YFC3002603)
重庆市研究生联合培养基地建设项目(JDLHPYJD-2020029)。
关键词
可移动组合式护栏
公路施工作业区
摩擦因数
护栏高度
有限元模拟
足尺实车碰撞试验
movable assembled guardrail
expressway work zone
friction coefficient
height of barrier
finite element simulation
full-scale vehicle collision test
作者简介
第一作者:孟云伟,男,博士,教授,1980年生,E-mail:514346081@qq.com。
