Research on the Simulation of Wheelset Response Characteristic Identification of Railway Fastener Loosening

Figure 3

Substructure model of rail and rail slab: (a) rail substructure model. (b) Rail board substructure model; the purple triangle mark in the figure is the location of the selected master DOF node; the total number of master DOF should be greater than the order of the subsequent modal analysis, or equal to twice. The predicted deformation direction of rail and rail slab is selected as the master DOF. The location of the load and constraint shall be selected as the main degree of freedom, master DOF is evenly distributed as far as possible, and the nodes at both ends of rail and rail slab and the nodes at fastener positions are selected as the main nodes of degrees of freedom. (a) Rail. (b) Rail slab.

(a)

(b)