Damping fastener with non-uniform rigidity and design method thereof

The invention provides a rigidity non-uniform vibration reduction fastener and a design method thereof. The problems that when the compression type vibration reduction fastener bears loads in the vertical direction and the transverse direction of a wheel, due to the fact that an elastic vibration reduction layer bears non-uniform loads (the loads on the inner side of a steel rail are small, and the loads on the outer side of the steel rail are large), non-uniform deformation occurs, the steel rail and an upper iron base plate deflect, the transverse displacement of a rail head is increased, and the transverse stability of the fastener is reduced are solved. According to the method, aiming at the problem, through simulation calculation and actual testing, the deflection conditions of the vibration reduction fastener steel rail and the upper iron base plate which are in conventional rigidity homogenization design are analyzed; the stress conditions of different parts of the anti-vibration pad are obtained throu