[Objectives] The observation window is the most important component of manned submersible for personnel and structural safety. It is extremely important to accurately calculate the structural creep performance under long-period loads.
[Methods] This paper adopts the method of combining static force of the material tensile specimen-general and observation window contact and load step by step to obtain the typical creep model benchmark parameters in ABAQUS corresponding to the observation window glass structure, and then calculate the verification model and the physical window. The results of the numerical solution under the bulk structure are consistent with the experimental data, revealing the reliability of the observation window structural creep model under high pressure. Meanwhile the creep behavior of the observation window structure under the multi-parameter structure and different loading rates has been carried out respectively.
[Results] The numerical results reveal that the calculation results based on the creep model are more in agreeing with the real mechanical behavior of the observation window structure and actual engineering applications; the observation window with a cone angle of 70° is more reasonable and optimized under the parameterized optimization, and the stress level of the structure is more reasonable. The creep performance is better and the phenomenon of "pits" near the center of the high-pressure surface of the observation window and "peeling" inside the window under high pressure is the result of the structural creep response.
[Conclusions] The study about the structural creep behavior of the observation window based on the ABAQUS creep model is accurate and reliable, and provides a theoretical reference for the design optimization and life analysis of manned submersibles.