列车动载下双线隧道联络通道动力响应数值分析

Numerical Analysis on Dynamic Responses of Interface Channel of Double-track Tunnel Induced by Dynamic Train Loads

建立联络通道、隧道及列车的三维有限元模型,研究由公路车道准静态载荷以及列车动载引起的双线隧道联络通道动力响应。提出基于网格变形的接触模型修正方法,以提高计算精度。运用基于接触负载均衡的显式并行计算方法,在曙光5000A超级计算机的并行平台上,求解该大规模非线性问题。分析联络通道埋深、土层对应力及位移响应的影响,验证该通道设计的合理性,给出提高联络通道安全性的建议。分析影响模型计算并行效率的主要因素。

Abstract：The 3-D finite element models of the interface channel, tunnel and train were established in order to analyze the dynamic responses of the interface channels of double-track tunnels subjected to quasi-static high- way lane loads and dynamic train loads. The contact model modification method based on the mesh morphing technology was proposed to improve contact simulation quality. The large-scale nonlinear problem was solved on the Dawning 5000A supercomputer parallel platform by using the contact haiance biseetioa algorithm. The influence of the buried depth and soil strata of the interface channel on stresses and displacement responses was analyzed to verify the rationality of design of the interface channel. Suggestions were made to improve the safety of the interface channel. Finally, the main factors affecting the efficiency of parallel computation were analyzed.