浮置式轨道结构的自振频率有限元分析

摘要

浮置式轨道结构作为一种减振降噪的轨道结构，广泛应用于城市轨道交通线路中。目前，这类轨道结构有钢弹簧浮置板、隔离式减振垫和梯形轨枕等几种轨道型式，其中钢弹簧浮置板轨道又包括传统的现浇钢弹簧浮置板轨道与新型的预制钢弹簧浮置板轨道。文章通过对这4种浮置式轨道的自振频率有限元分析，研究了不同设计参数对它们各自自振动频率的影响，以期为今后浮置式轨道结构其他动力特性分析提供参考。%Floating track structure has several structures types, namely steel spring floating slab, isolation type of damping pad and ladder sleeper etc. The steel spring floating slab track also includes traditional cast-in-place steel spring floating slab track and new prefabricated steel spring floating slab track. Based on the finite element analysis of the natural vibration frequency of these 4 kinds of floating tracks, the paper studies the effects of different design parameters on their respective influence and natural vibration frequency in order to provide reference for future analysis on dynamic characteristics of floating track structure.