Objective In view of the shock resistance performance of the vibration isolation system of warship equipment, the shock response of vibration isolation system with multiple coupling elastic components is investigated.
Methods First, a physical model of vibration isolation system with multiple coupling elastic components constituted of vibration isolator and limiter as well as external flexible pipeline is established. The impact dynamic response characteristics of vibration isolation system is studied by using the finite element method. In addition, the impact test of the vibration isolation system were carried out to verify the finite element model.Finally, the influences of the stiffness of elastic components on the impact response characteristics are performed.
Results Numerical results of the shock responses of elastic isolation system are consistent with the impact test results, which verifies the feasibility of the simulation method of elastic isolation system. With the introduction of flexible pipes, the total vertical stiffness of the vibration isolation system increases, the displacement response of vibration isolation system reduces and the acceleration response increases.
Conclusions With the increase of the nonlinear stiffness of the elastic element, the displacement response of the vibration isolation system decreases and the acceleration amplitude increases. The nonlinear stiffness of elastic components can regulate the impact resistance of the equipment, which provides guidance for the impact protection design of ship structural equipment.
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