摘要
针对高速铁路声屏障会受到高速列车通过时产生的气动载荷的反复冲击问题,根据高速铁路声屏障单元板承受气动载荷冲击能力评估的需要,对高速铁路声屏障单元板进行气动疲劳载荷模型研究.建立了高速铁路声屏障表面压力测试系统,利用不同条件下声屏障表面气动载荷现场测试数据,研究承受最大气动载荷的声屏障目标单元板;在此基础上,给出了用于声屏障单元板气动疲劳试验的两种气动疲劳载荷施加方案,建立针对这两种气动疲劳载荷施加方案并同时考虑高速列车气流冲击和横风作用的声屏障单元板气动疲劳载荷模型.结果表明:当列车所受横风风速不变时,随着列车车速的增加,动态载荷和动态载荷变化频率皆随高速列车车速的增加而增大;相比较,动态疲劳载荷受车速的影响更大.
The high-speed railway noise barriers are repeatedly impacted by aerodynamic load when high-speed trains pass by.To address this problem,according to the needs of assessing the impact capacity of high-speed railway noise barrier unit panel to withstand aerodynamic load impact,the aerodynamic fatigue load model of high-speed railway noise barrier is studied.Then this paper establishes a surface pressure test system for high-speed railway noise barriers.The field test data of aerodynamic load on the surface of noise barrier under different conditions are used to study the target noise barrier unit panel that can withstand the largest aerodynamic load.On this basis,this paper presents two aerodynamic fatigue load application schemes for the aerodynamic fatigue test of noise barrier unit panel.The aerodynamic fatigue load model of noise barrier for the two schemes is established,which considers the impact of high-speed train airflow and crosswind effect at the same time.The research results show that when the crosswind speed is constant,with the increase of train speed,the dynamic load and dynamic load change frequency is increased,but the dynamic load is more influenced by train speed.
作者
赵允刚
李啸宇
宁智
吕明
ZHAO Yungang;LI Xiaoyu;NING Zhi;LYU Ming(China Railway Electrical Industry Co.,Ltd.,Baoding Hebei 071000,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2021年第6期58-64,共7页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家重点研发计划(2017YFC0211104)。
关键词
高速铁路
声屏障
单元板
气动疲劳载荷
high-speed railway
noise barrier
unit panel
aerodynamic fatigue load
