Nonlinear optimization method for mechanical properties of vibration isolation element

The invention discloses a nonlinear optimization method for mechanical properties of a vibration isolation element, which comprises the following steps of: defining a key load position of a vibration isolator according to a quasi-static component of a response signal of the vibration isolator when a train passes; limiting a displacement peak value at the maximum load according to a force-displacement curve relationship by utilizing the characteristic that the rigidity is gradually hardened along with the displacement; a minimum rigidity value is obtained when the gradually-hardened nonlinear floating slab vibration reduction track system is in a static balance state, and it is ensured that the system has the strongest low-frequency vibration isolation performance before/after the system is impacted by a vehicle; by adjusting the static equilibrium state rigidity value of the system, it is ensured that the system has the maximum vibration suppression capacity near the first-order inherent frequency of the floa