Abstract

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Title:: Whole Process of Dynamic Response of Damaged Reticulated Structure Shell Under Impact Load

Keywords:: impact load; damaged reticulated shell; dynamic stability; whole process response

Abstract:: A K6 damaged single-layer reticulated shell structure model was established with the international universal nonlinear finite element software ANSYS/LSDYNA which was specialized in computing dynamic load. The influence of material strain rate was considered. The vertex points and damaged points were respectively applied with impact load to track the whole process of dynamic response of structure under different peak loads. Node loaddisplacement curves were calculated and described. According to B-R criteria, dynamic instability critical loads under different points of impact loads were got and compared to structural response under the actions of the same amplitude static loads. The results show that structural response under impact load is much greater than that under static load and the failure forms of structure are not the same. The conditions of damaged area exerted impact load need to be avoided for damaged structure and the damaged parts need repair and reinforce.