Simulation and Test Analysis of Impact of Parachute Open on Torpedo Stern Shaft

To solve the design problem of a high-strength stern shaft in a narrow torpedo space, with the light torpedo stern shaft assembly as the research object, Abaqus finite element software was used to perform static strength and vibration impact analysis, to obtain the maximum stress area of the torpedo stern shaft assembly on the parachute-opening moment at the latestage of rocket-assisted torpedo flight, and determine the weakest point. Accordingly, to improve the structural design and process optimization, the optimized products are then tested to verify the effectiveness of the optimized design. The test results show that the iterative improvement method with finite element analysis and land test can enhance design accuracy and efficacy, especially for complicated structures such as torpedo stern shaft assembly, and to meet the complicated use requirements.