天津地铁6号线两种钢弹簧浮置板轨道结构模态分析

The Modal Analysis of the Track Structure of Two Kinds of Steel Spring Floating plates in Tianjin Metro Line 6

根据天津地铁6号线现浇与预制钢弹簧浮置板轨道结构设计参数,建立两种钢弹簧浮置板轨道结构有限元模型,对天津地铁6号线现浇浮置式轨道板结构与预制浮置式轨道板结构进行了模态分析,研究其动力特性的差异。对单块轨道板的计算结果表明,天津地铁6号线两种轨道板结构一阶固有频率相差不大,而高于一阶的固有频率预制轨道板结构比现浇轨道板结构高,不利于衰减频率高于一阶共振频率的振动。

According to the design parameters of the track structure of cast-in-place and prefabricated steel-spring floating slab of tianjin metro line 6,the finite element model of two types of steel-spring floating slab track structure was established,and the modal analysis of the cast-in-place floating slab track structure and prefabricated floating slab track structure of tianjin metro line 6 was carried out to study the differences in its dynamic characteristics.The calculation results of the single track slab show that the first-order natural frequencies of the two track slab structures in line 6 of tianjin metro are not very different,while the prefabricated track slab structures with higher natural frequencies are higher than the cast-in-place track slab structures,which is not conducive to attenuating the vibration with frequencies higher than the first-order resonant frequencies.