路基工程Issue(4)：7-13,7.DOI:10.13379/j.issn.1003-8825.202412036
高铁路基减振结构三维复频散曲线计算分析
Three-dimensional Calculation and Analysis of Complex Dispersion Curves for Vibration-reduction Structures in High-speed Railway Subgrades
摘要
Abstract
To address the limitation of existing two-dimensional complex dispersion curves in fully reflecting the attenuation degree of periodic pile rows on elastic waves,a method for calculating three-dimensional complex dispersion curves of periodic pile rows was established using the PDE module in the finite element software COMSOL.This method accounted for the mixed propagation of compressional waves,shear waves,and surface waves,and enabled quantification of the attenuation level at each frequency within the attenuation zone for infinite periodic pile rows.The influence of different pile arrangements,pile lengths,and pile materials on the characteristics of the complex dispersion curves was analyzed,and the results were validated through frequency-domain responses from finite periodic pile row models.The results show that:the triangular arrangement exhibits the highest peak attenuation frequency(32.5 Hz)and the widest attenuation bandwidth(26.0-37.6 Hz),which is closest to the dominant vibration frequency of high-speed trains.Increasing pile length slightly reduces the attenuation bandwidth but has minimal effect on the peak frequency.Steel piles provide better attenuation performance than concrete piles and rubber-steel composite piles;notably,the composite pile effectively suppresses low-frequency vibrations due to its local resonance characteristics.Numerical simulations of finite periodic pile rows indicate that setting four rows of piles achieves good attenuation performance,with the attenuation zone and magnitude closely matching the predictions from the complex dispersion curve calculations.关键词
周期排桩/复频散曲线/COMSOL/三维模型/高铁隔振Key words
periodic pile rows/complex dispersion curves/COMSOL/3D model/high-speed railway vibration isolation分类
建筑与水利引用本文复制引用
陈晓斌,徐铁洁,王业顺,戴佑才,刘天希..高铁路基减振结构三维复频散曲线计算分析[J].路基工程,2026,(4):7-13,7.基金项目
国家自然科学基金资助项目(51978674) （51978674）
