梯形轨道减振性能试验研究和数值模拟分析

结合北京交通大学地下工程实验室的减振试验,从试验结果分析、数值模拟2方面来研究梯形轨道的动力响应特性,试验结果和数值模拟都表明梯形轨道具有良好的减振性能:对28Hz以上频段引起的振动,减振效果可以达到40多dB;在对低频振动要求不太严格的地方,梯形轨道完全可以实现减振降噪的功能;为梯形轨道能够应用于地铁隧道减振提供了一定的理论支持.

Research on Vibration Reduction Characteristics of Ladder Tracks by Numerical Simulation and Experiments

This paper analyzes the vibration reduction characteristics of ladder tracks by numerical simulation and experiments based on the vibration experiments performed in the Laboratory of Tunnels and Underground Works of Beijing Jiaotong University. The experimental results as well as numerical simulation indicate that the ladder track possesses good performance in vibaration reduction. Vibration reduction for frequencies above 28 Hz can reach more than 40 decibels. For low-frequency vibrations with less strict restrictions, ladder tracks can definitely realize vibration and noise reduction functions. This paper provides theoretical basis to certain extent that ladder Wacks can be adopted for vitration reduction in subway tunnels.