为解决大风环境下高速列车的安全问题,铁路路基拟采用防风走廊结构以抵御大风和风沙。综合比较研究复合材料的比强度、比刚度和耐蚀性等各项性能参数后,拟选择复合材料作为防风沙走廊结构材料。分别对玻璃纤维增强不饱和聚酯复合材料风沙侵蚀前后进行了弯曲和拉伸性能测试,研究了喷砂角度、喷砂风速和喷砂时间对材料力学性能的影响。结果表明,喷砂角度对于侵蚀效果影响不明显;随着喷砂风速的增大和侵蚀时间的延长,侵蚀程度不断加深,侵蚀效果随风速呈线性变化。
To solve the security problem of high-speed train in the high wind environment,the structure of anti-wind corridor was used to withstand wind and sand for the railway.Glass fiber/unsaturated polyester composites were selected as the structure materials because of their the high specific strength,stiffness and corrosion resistance.The tensile and bending properties of composites under different sand erosion conditions were measured to study the influence rules of different sand erosion conditions on the composites.The results show that with the increasing of sandblasting angle,the erosion effect is unobvious.The effect is magnified with the higher wind speed and exposure time and the erosion effect shows linear variation.
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