Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
The transient transmission laws of strong impact load in projectile fuze threaded connection system
| DOI: | 10.11809/bqzbgcxb2025.01.005 |
| Keywords: | projectile fuze system; threaded connection; impact response; high overload; fuze vibration |
| Abstract: | By investigating the load transmission characteristics of the projectile fuze thread connection structure under high dynamic launching conditions, numerical simulation model was established, incorporating the Yamamoto’s method and experimental validation, to develop the elastic plastic behavior and nonlinear contact in the projectile fuze threaded connections. A comparative analysis was performed to examine the load transmission properties of steel aluminum and steel steel projectile fuze thread connections, with a focus on the effects of factors such as thread dimensional tolerances, number of engaged threads, and preloading force on the load transmission behavior of the steel aluminum thread connection structure. The results reveal that the steel aluminum and steel steel thread connection structures exhibit amplification of impact overload, but the stability of the steel aluminum structure is superior. Increased thread dimensional tolerances amplify the fuze’s overload amplification factor, circumferential and axial vibration amplitudes, and the proportion of load carried by the first thread. Furthermore, the fuze’s circumferential vibration amplitude decreases with more engaged threads. The influence of preloading force on the overload effects during launch is found to be insignificant. The greater the preload, the more uneven the distribution of load bearing across the threaded levels. |
| Issue: | Vol. 46 No. 1 (2025) |
| Published: | 2025-01-31 |