Research on the Shock Response Characteristics of a Threaded Connection Using the Thin-Layer Element Method

Nonlinear factors such as the contact stiffness and friction damping at threaded interface of a projectile–fuse system significantly affect dynamic response characteristics. To obtain fuse body accurately during penetration, it is necessary to characterize these nonlinear reasonably. Because existing structural dynamics software cannot effectively deal with factors, thin-layer element method was used represent in this study. By combining thread elastic model principles, an effective for determining material parameters established theoretically, which provided different parameters, not just relying on experiments. The accuracy verified based modal experiments tubes having specifications. errors were within 5%, indicating reliability theoretical determination parameters. In addition, projectile penetration into semi-infinite concrete target tested verify modeling. Compared ‘TIED’ constraint method, resonant frequency obtained better agreement that experimental data. maximum error decreased from 15.7 7.8%, could factors. Thus, study serves reference evaluating penetrator.