强激励下某载具承载装置动态响应分析

In order to ensure the stability and reliability of a carrier, a dynamic response analysis was analyzed for the carrier bearing device under strong excitation. Firstly, an integral finite element model of soil-concrete-carrier structure was established. Then a viscoelastic boundary and seismic concentrated force loads were applied in batch to the soil boundary of the model through the joint development of MATLAB and ABAQUS. An explosive strong excitation load was applied to the earth surface in a CONWEP loading mode. Finally, the dynamic response of the carrier was analyzed respectively under earthquake and explosion load. The results show that the dynamic response of the bearing device is mainly horizontal during earthquake and vertical during explosion. The peak displacement of the carrier does not exceed the safely value, and there is no risk of collision. The peak value of carrier inclination is less than 1° all. Combined with Sparrow Search Algorithm (SSA), Mixup data enhancement and BP neural network, the stiffness and damping parameters were optimized for the carrier damping device. Comparing with the data of basic model, the peak value of horizontal acceleration and vertical relative displacement of the optimized model can decrease by 14.9% and 23.1% respectively under earthquake stimulation. The research result can provide a reference for carrier vibration reduction optimization.