Simulation and Analysis of Fluid–Solid–Thermal Unidirectional Coupling of Near-Space Airship

Based on the biaxial experiment data of membrane material under hot and cold conditions, mechanical properties calculation model envelope was established with consideration effects varying stress ratios, magnitudes temperatures near-space airship material. Using heat source model, Computational Fluid Dynamics (CFD) simulation, User-Defined Function (UDF), structural finite element analysis software user subroutine an to define behaviour fabric material, fluid–structure–thermal coupling envelopes established. In addition, a selected as research subject calculate diurnal temperature differences during summer solstice analyse distribution envelope. Under controlled environmental deformation law influence calculated summarised. The present fluid–solid–thermal takes into account anisotropy materials, temperature, magnitude, ratio other influencing factors, which can more accurately reflect predict stress–strain airships.