墊板剛度對地鐵線路軌道垂向特性的影響研究

黃乾興　唐可

摘 要：本文基于車輛-軌道耦合動力學理論，運用MATLAB軟件建立了地鐵車輛-軌道耦合模型，分析了軌下墊板剛度對軌道結構動力學性能的影響。結果顯示：低剛度的軌下墊板有利于降低鋼軌和軌道板的振動，并能降低軌道板和道床的垂向位移，因此及時檢查并更換老化的橡膠墊板可有效提高軌道的平穩性。

關鍵詞：地鐵線路 軌下墊板 動力學性能

Study on the Influence of the Stiffness of the Track Pad on the Vertical Characteristic of the Subway Line

Huang Qianxing，Tang Ke

Abstract：Based on the dynamics theory of the vehicle-track coupling system， this MATLAB software used to establish a metro vehicle-track coupling model， and analyzes the influence of the stiffness of the under- track pad on the dynamic performance of the track structure. The results show that the low-rigidity under- track pad is beneficial to reduce the vibration of the rail and the track slab， and can reduce the vertical displacement of the track slab and the track bed， so timely inspection and replacement of the aging rubber pad can effectively improve the stability of the track.

Key words：subway line， under-track pad， kinetic performance