Analysis of influence of rubber pad stiffness on force characteristics of elastic bars and T-bolts
In order to explore the influence of the stiffness of rubber pad on the stress characteristics of elastic bar and T-bolt in WJ-7 type fastener system of high-speed railway ballastless track,the influence of the frequency-dependent stiffness of the traditional groove type and new mesh type rubber pad on the vertical displacement of the rail was stu-died by Abaqus-Simpack joint simulation.The finite element model of the fastener system was established,and the vertical displacement of the rail was used as the input load for simulation analysis.The results show that when the cir-cular,pentagonal and hexagonal mesh rubber pads are used under the track,the vertical displacement of the rail is re-duced by 40.7％,38.6％and 38.3％respectively compared with that of traditional groove rubber pad.In addition,the maximum Mises stress of the elastic strip is reduced by 0.52％,0.39％and 0.38％respectively,while the maximum Mises stress of the T-bolt is not much different.It can be seen that compared with the traditional groove type rubber pad,the damping performance of the new mesh type rubber pad is greatly improved.When the rail pad is a new mesh type rubber pad,it is more conducive to improve the fatigue life of the elastic bar,and the circular mesh type rubber pad has the best performance in the above two aspects.The frequency-dependent stiffness of the rubber pad has little effect on the stress characteristics of the T-bolt.
high speed railwayWJ-7 type fastenerrubber padfrequency-dependent stiffnessfatigue life
万方数据
维普
