连续型隔振屏障在高速铁路环境振动问题治理中的应用研究

为探究高速铁路两侧隔振屏障隔振效果，采用有限元与无限元边界结合的方式进行分析，研究不同连续型隔振屏障及布置形式对隔振效果的影响。通过现场试验与同尺寸、同属性有限元模型对比试验，验证有限元模型合理性。计算结果表明：不同连续型隔振屏障中，空沟隔振效果最优，空沟隔振措施适合高速列车隔振；隔振屏障宽度为0.6～2.5倍波长时，其对隔振效果的影响较小，随着宽度的改变，隔振效果变化幅度较小；隔振屏障深度为3.8～15.2倍波长时，其对隔振效果的影响较明显，随着深度的增加，隔振效果增强；屏障位置对隔振效果的影响较大，建议屏障应靠近路基布置；连续型隔振屏障对高频的隔振效果优于低频。

Based on the Infinite Element Boundary Analysis, the Study of the Effect of Continuous Barrier on the Environmental Vibration of High-speed Railway

In order to explore the vibration isolation effect of the vibration isolation barriers on both sides of high-speed railway, the finite element method combined with infinite element boundary was used to calculate and analyze the influence of different continuous vibration isolation barriers and their layout on the vibration isolation effect. Firstly, the validity of the finite element part was verified by setting experiment and finite element model of the same size and same attribute. The verified results were valid. The results show that the best vibration isolation effect of the gully is obtained by comparing all kinds of continuous vibration isolation barriers, and the gully is suitable for high-speed trains. The width within the range of 0.6～2.5 times of the wavelength has little influence on the vibration isolation effect. With the change of width, the vibration isolation effect changes only slightly. The vibration isolation effect is obviously affected when the depth of the vibration barrier varies from 3.8 to 15.2 wavelength. With the increase of depth, the vibration isolation effect is enhanced. The position of the barrier has great influence on the vibration isolation effect. It is suggested that the barrier should be close to the roadbed. Continuous barrier has better vibration isolation effect at high frequency than at low frequency.