摘要
本文主要介绍了不同国家标准中对动车前风挡玻璃抗冲击试验方法的要求,以及试验所用弹体和弹速的相关规定,阐述了前风挡玻璃结构的组成及材料选择,以及不同材料对抗冲击性能所起到的作用。高速动车前风挡玻璃需要抵抗大的石块、飞鸟和小的碎石块的撞击,不同的冲机体对风挡玻璃的破坏作用不同。总体来说,抵抗飞鸟需要风挡玻璃有更大的刚度,抵抗大的石块冲击需要风挡玻璃采用更多的柔性中间层材料,依靠风挡玻璃的整体变形吸收冲机体的能量来阻止弹体穿透玻璃,抵抗小的碎石冲击需要外表面玻璃更厚且有高的表面压应力值和应力层深度。需要综合考虑3种弹体的破坏作用,来确定最优的风挡玻璃结构。
The impact test methods according to different national standards of high speed train windshield are introduced, described the detail of impact projectiles and impact speed requirement,and expounded the principle of design EMU windshield glass structure and composition of material selection.Explain different materials effect impact performance.High-speed train windshield need to resist large stones,birds and small ballast,different projectile will cause different damage of windscreen. Generally,the windshield stiffness more higher more better for resistance bird impact; but for resistance hard projectile impact,use more flexible middle layer material is better, interlayer and deformation of windshield will absorb impact energy and will prevent the hard projectile penetrates the glass;the thickness of outer side glass surface compressive stress value and the depth of the stress are important for resistant gravel impact. Need to consider the damage effect of 3 projectiles,to determine the optimal structure of the windshield glass.
出处
《中国建材科技》
2016年第3期38-39,43,共3页
China Building Materials Science & Technology
基金
国家质量监督检验总局质检公益性行业科研专项项目(201110244)
