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针对高速列车运行对轨道产生的平顺性和稳定性影响,采用ADAMS/Rail软件,基于车辆-轨道耦合模型,分析填料刚度、车速、过渡段长度、隧-隧间距等对隧-隧过渡段路基的动力不平顺及动力响应的影响规律。研究表明:过渡段长度和隧-隧间距对轮载力响应影响较大;车速对轮载力响应有一定影响,车速越高,相应的轮载力也越大;刚度差异对轮载力响应影响较大,刚度差异越大,相应的轮载力也越大;动位移响应沿轨道走向呈“W”形分布;竖向动应力值随深度增加呈指数函数减小;基床刚度越大,其动位移响应幅值越小,相应的动应力越大。研究成果对控制路基与隧道等构筑物的差异沉降,实现轨道刚度与沉降平顺过渡,具有一定的参考意义。
In view of the impact of high-speed train operation on track ride and stability, ADAMS / Rail software was used to analyze the influence of filling stiffness, speed, transition length and tunnel-tunnel spacing on tunnel-tunnel transitional subgrade The power of irregular and dynamic response of the law. The results show that the length of the transitional section and the tunnel-tunnel spacing have a great influence on the wheel-load response; the vehicle speed has some influence on the wheel-load response; the higher the vehicle speed, the greater the wheel-load force; The greater the difference in stiffness, the greater the wheel load, the more the dynamic displacement response is along the orbital path and the vertical dynamic stress value decreases exponentially with the increase of depth. , The smaller the dynamic displacement response amplitude, the greater the corresponding dynamic stress. The research results have certain reference value for controlling the differential settlement of subgrade and tunnel structures and achieving the smooth transition of track stiffness and settlement.