Research on dynamic response of spherical shell apex and its concave radius under impact

Abstract

Abstract: The dynamic response and response ratio of the structure system are deduced by establishing the motion equation of the impact zone of the spherical reticulated shell under the triangular pulse load. At the same time, based on the principle of approximate energy, the large plastic deformation of spherical reticulated shell structure under impact loading is calculated, and the radius of the shell concave area under single point impact at the top of the structure is simplified. The K6 single-layer spherical reticulated shell is established in ANSYS/LS-DYNA to numerically validate the derived expression. The results show that the main influencing factors of the maximum response of the structure are the duration of the impact load and the natural frequency of the structural system. The concave radius is affected by the curvature radius, equivalent thickness, edge width, yield stress, and impact energy absorbed by the structure. Moreover, the theoretical value is close to the simulation value.

Key words: reticulated shell structure, dynamic response, plastic deformation, approximate energy principle, impact load

CLC Number:

TU399

WU Chang, WANG Hua-xin, ZHANG Dan, YANG You-pei, ZHANG Yue-han. Research on dynamic response of spherical shell apex and its concave radius under impact[J]. Journal of Lanzhou University of Technology, 2026, 52(1): 135-141.

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