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以CRTSⅠ型板式无砟轨道作为研究对象,运用有限元软件ANSYS,建立有限元梁体模型,对轨道板不同脱空长度的轨道结构进行模态分析,为轨道结构的损伤识别提供理论指导。计算结果表明:随着轨道板脱空长度的增加,轨道结构的同阶固有频率减小;振型的波峰逐渐向脱空区域移动,在脱空区域轨道板的垂向位移增大,轨道板与凸台分离明显。
Taking the CRTS Ⅰ slab ballastless track as the research object, finite element software ANSYS was used to establish the finite element beam model. The modal analysis of the track structure with different void lengths of the slab was carried out, providing theoretical guidance for the damage identification of the track structure. The calculation results show that with the increase of the emptying length of the track slab, the same natural frequency of the track structure decreases; the peak of the mode shapes gradually move to the void area, and the vertical displacement of the track slab increases in the emptying area, Separated from the boss is obvious.