THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS ON THE CONNECTING STRUCTURE BETWEEN BACK-JOINT AND FIXED BODY OF SOLID ROCKET MOTOR

摘要

Finite element calculation about three coupled nonlinearities of geometric nonlinearity, elastic-plastic and contact is performed on the connecting structure between back-joint and fixed body of SRM in this paper. Under the condition that other dimensions of this structure are not changed, thickness of the major edge flange about fixed body is adjusted and several models of different thickness between 20 mm and 40 mm are calculated and contrasted. The results show that variety of thickness has major influence to the airproof between fixed body and back-joint.