Aerothermoelasticity calculation technology of multi-field coupling of trajectory status of hypersonic aircraft

Abstract

The invention discloses an aerothermoelasticity calculation method of multi-field coupling of trajectory status of hypersonic aircraft, and belongs to the field of aircraft aerodynamic-calculation. Inthe engineering fields of aerospace and the like, aircraft structures suffer severe aerodynamic heating effects with increasing of flying speed of the supersonic aircraft; and at the same time, flying trajectories are more complex due to more and more complex mission requirements, and aerodynamic heat environments are also more difficult to predict. Therefore, the aerothermoelasticity problem under the complex trajectories deserves attention. According to the method of the invention, a method of combination of inviscid-external-flow solutions and an engineering method is adopted for aerodynamic heating calculation of the high-speed aircraft, compared with a pure numerical method, the method of combination can save massive memory and calculation time, and reduces calculation costs, and compared with a pure engineering method, the same is wider in an application range, can be adapted to relatively complex shapes, and can also provide relatively-accurate aerodynamic heat solutions at thesame time.

Description

technical field [0001] The invention belongs to the field of aircraft aerodynamic calculation methods, in particular to a thermoaeroelastic calculation method for multi-field coupling of hypersonic aircraft ballistic state. Background technique [0002] In engineering fields such as aerospace, as the flight speed of supersonic vehicles increases, the structure of the aircraft suffers from severe aerodynamic heating. At the same time, due to the increasingly complex mission requirements, the flight trajectory is more complicated, and the aerodynamic and thermal environment is also more difficult to predict. The high temperature and temperature gradient generated by aerodynamic heating on the structure will reduce the mechanical properties of the structural material, and the uneven thermal deformation and thermal stress inside the structure will change the stiffness characteristics of the structure, and at the same time change the inherent vibration characteristics of the stru...

AI Technical Summary

Problems solved by technology

However, there are few methods for predicting the thermal environment of structures under complex ballistic states.

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