Shock-mitigating device adopted at both ends can improve the resistance of protective door

and the device has great effect on vibration characteristics and dynamic responses of the door

Therefore

it is necessary to study the dynamic responses of the structure to explosion loading.The computational model of the protective door with shock-mitigating device is established

and the analytical expressions of the structure under explosion loadings are deduced.The effects of shock-mitigating device on dynamic responses to loads induced by chemical explosion and nuclear explosion are also studied.The analysis shows that shock-mitigating device consisting of elastic support and damping support can make the dynamic coefficient decrease obviously.Therefore

the bearing capacity to resist explosive loads can be relatively increased

but the effectiveness lies on the stiffness of elastic support

actuation duration of explosion loading and vibration damping.