Experimental study on single-layer spherical reticulated shell under multipoint impact load

Abstract

To assess the dynamic performance of the reticulated shell structure under multipoint impact load, the strain peaks of key members, displacement peaks, and acceleration time history curves of key nodes in the impact process are analyzed through the experimental study of the K6 single-layer spherical reticulated shell under multipoint impact load. The results show that the effects of the number and position of the impact points on the dynamic response of the impact zone of the reticulated shell structure are large. A model with a size equal to the test model is established with ANSYS/LS-DYNA. The simulation results are consistent with the test results, and the variation trends of the dynamic response of the structure are the same. The results show that the strain, displacement, and acceleration of the impact area of the reticulated shell gradually increase with the increase in the number of impact points. Under the same number of impact points and impact speed, the more concentrated the impact point is, the greater is the strain, displacement, and acceleration of the impact area of the reticulated shell structure. When the number of impact points is constant, the farther the impact point from the top of the reticulated shell structure, the smaller is the displacement of the impact area of the reticulated shell structure.