新型波形梁护栏端头开发

Terminal development of a new type of W-beam guardrail

为降低由于碰撞波形梁护栏端头引起的乘员伤亡,参考国内外相关标准,依据中国的交通流特性,提出波形梁护栏端头的碰撞试验条件和评价标准,采用有限元仿真分析和实车足尺碰撞试验相结合的技术手段,开发出一种满足评价标准的新型波形梁护栏端头。计算结果表明:开发的新型波形梁护栏端头利用卷曲波形梁吸收车辆动能,能够有效避免波形梁插入车体和翻车事故的发生,车体重心加速度小于20g,保护了乘员安全,同时能够为标准段护栏提供足够约束力,保证标准段护栏的正常防护能力。护栏端头满足评价标准的要求,可为失控车辆提供安全防护。

In order to reduce the serious accidents caused by impacting W-beam guardrail terminal, the properties of traffic flow were analyzed, the impact test methods and acceptance criteria for the terminal were brought out based on referring to correlative domestic and overseas standards, a new type of W-beam guardrail terminal was developed by using finite element analysis and full-scale impact tests, which meets acceptance criteria. It is pointed that passengers can be protected for that the acceleration of vehicle gravity center is less than 20g by rolling W-beam to absorb accident car＇s kinetic energy, which keeps W-beam from piercing into car or accident car from turning over, and the containment level of standard section for barrier is guaranteed by enough restraining force at the guardrail terminal. The result indicates that the performances of the terminal meet acceptance criteria and can protect accident vehicles. 3 tabs, 11 figs, 10 refs.