Study on the Thermal Response Characteristics of Liquid Hydrogen Tank

This study systematically investigates the mechanical performance of cryogenic storage tanks in liquid hydrogen service through integrated experimental and numerical approaches, revealing several critical findings. The thermal analysis demonstrates significantly higher heat leakage at fixed‐end support structures compared to sliding‐end configurations, with the minimum temperature occurring at the upper fixed‐end support. Structural assessments show that thermal effects dominate the inner vessel's deformation, accounting for 95.20% of total displacement, while inducing substantial stress increases in all support structures except the upper sliding‐end support. Dynamic characterization under cryogenic conditions reveals systematic reductions in natural frequencies that amplify with increasing modal order, accompanied by localized vibration peaks exhibiting pairwise mode patterns. Fatigue life analysis indicates improved maximum vessel longevity under cryogenic exposure, though most supporting components experience reduced minimum life except for the upper sliding‐end structure.