TLV移动加载下轨道结构不良状态仿真识别

Simulation and identification of adverse condition of track structure under moving load of TLV(Track Loading Vehicle)

针对我国轨道加载试验车(Track Loading Vehicle,简称TLV)加载测试时无法系统识别轨道不良状态的问题,在充分考虑TLV移动加载为恒载的前提下,通过建立TLV—高速板式无砟轨道/重载有砟轨道—路基动力学耦合模型,研究TLV移动加载经过轨道薄弱区段时轨道结构的动态特性,得出了砂浆离缝、道床板结、轨枕空吊等轨道结构不良状态的识别特征,可为我国利用TLV识别轨道病害、指导轨道养护维修提供理论依据。

According to the identification problem of the bad track structure state systematically in T LV loading test, this paper established the dynamic coupling model of T LV-Slab Ballastless T rack ＆amp; Heavy-haul Ballast T rack-Subgrade under the consideration that T LV mobile loading is constant,studied the dynamic characteristics of track structure when the T LV mobile loading passes through the weak section along the track,proposed the identification features of the bad track structure state including mortar debonding,cement hardening and unsupported sleeper, which could provide a theory reference for T LV identification of the track diseases and track maintenance.