新型非导向防撞垫开发

摘要

为降低车辆碰撞护栏端部事故严重度,参考国内外相关标准,依据我国交通流特性,提出非导向防撞垫碰撞试验条件与评价标准,采用理论分析和实车碰撞试验相结合的技术手段,开发出一种新型非导向防撞垫.结果表明,开发的防撞垫能够防护1.5t小型车辆60 km/h正面碰撞,碰撞后车辆姿态良好,车体重心X.Y,Z三方向加速度最大值分别为18.9g,4.2g,6.1g,防撞垫最大动态变形为1 234 mm.非导向防撞垫满足评价标准要求,可弥补护栏端部安全漏洞.%In order to reduce accident severity caused by accident vehicles impact to barrier terminal, impact test condition and evaluation specification for non-re-directive crash cushion were brought out referring to correlative documents in and out of China, a new type of non-re-directive crash cushion which met the evaluation specification by conducting theoretic analysis and full-scale impact tests was invented. The results indicate that the non-re-directive crash cushion able to absorb kinetic energy of a 1. 5 ton car with 60km/h speed. The vehicle performs well after impact, the maximum acceleration at the position of vehicle gravity center is 18. 9g, 4. 2g, 6.1g in three directions, and the maximum dynamic deformation of crash cushion is 1234mm. The performances of the non-re-directive crash cushion meets the acceptance criteria and can make up the security dead angle of barrier terminal.