Time-adaptive loosely coupled analysis on fluid-thermal-structural behaviors of hypersonic wing structures under sustained aeroheating

With the mathematical and physical description of hypersonic intrinsic aerothermoelastic behaviors, the present paper proposes a time-adaptive multi-physics coupling strategy for fluid-thermal-structural modeling and analysis. A framework of hypersonic computational coupling dynamics (HyCCD) is developed for integrating an independently developed program solving hypersonic aerothermodynamics with a finite element analysis professional software. The embedded adaptive time-step approach, hybrid interpolation strategy and grid deformation method have taken into consideration the physical characteristics of coupling variables and their properties. A typical low-aspect-ratio hypersonic wing is considered as the simulation model to study the impact of sustained aerothermodynamic loads on the inherent vibrations, thermal modals and their variations. The time-adaptive loosely coupled analysis of aerothermoelastic behaviors along flight trajectory provides a reliable, applicable and efficient prediction for the thermal-structural-vibrational response of hypersonic wing structures.