轿车轮胎耐撞击性能试验的研究

对轿车轮胎耐撞击性能试验进行研究,探讨轮胎耐撞击性能的主要影响因素,为轿车轮胎耐撞击性能评价方法的完善提供大量有价值的数据。根据GB/T 38528—2020对轮胎耐撞击因子(f)的规定,参加摆锤撞击试验的轮胎的耐撞击性能总体达标率为66.1%;按照轮胎系列(高宽比)来确定f不够科学,轮胎断面高是耐撞击性能最重要的影响因素,建议以轮胎断面高来确定f;实车撞击与摆锤撞击试验结果相关性研究表明,摆锤撞击试验得到的f与实车撞击试验中轮胎损坏时速度之间存在一定的相关性,可以采用摆锤撞击试验方法评价轮胎耐撞击性能。

The response of collision speed caused by the large bus to new flexible barrier

In order to study the response of collision speed caused by the large bus to new flexible barrier,in this paper,with the large bus as the carrier,the full-scale impact tests between flexible barrier and vehicle with the impact velocities of 40 km/h and 60 km/h were carried out separately,following the procedures of the test preparation,test processing,data acquisition, etc,which were based on the test platform of the Large Structure Crash Testing Laboratory of Changsha University of Science and Technology. The important test results which contain the damage of vehicles and barrier,the moving locus of vehicle,the occupant risk index,the maximum dynamic deformation, etc,were obtained through the analysis under the different collision speeds. These provide the necessary reference basis for the further research on the structure topology optimization and improve the comprehensive constraint performance to the flexible barrier.

国外阻拦型防撞路障评测规范对比分析

在全球恐怖主义袭击活动中,车载简易爆炸装置(VBIED)已逐渐成为对重要建筑目标袭击的最主要方式,因而车载简易爆炸装置被视作建筑结构与基础设施安全的重大威胁。阻拦型防撞路障作为重要建筑周边的第一道安全屏障,能够有效阻控潜在威胁车辆对建筑物的接近。对国外现有阻拦型防撞路障的相关试验与测评规范进行了介绍,并对各个规范在撞击车辆类型、撞击工况等级、撞击侵入距离以及试验场地要求等多个重要指标与条件方面进行了对比分析,从而可了解国外规范对阻拦型防撞路障的功能要求,为今后我国相关研究的开展以及试验测评规范的制定提供参考。