A method and system for structural dynamics analysis of inflatable reentry vehicle considering nonlinear effects

Abstract

The invention relates to a structural dynamics analysis method and system of an inflatable reentry vehicle considering nonlinear effects, which belongs to the field of spacecraft reentry and return, and can accurately describe different inflation pressures, film thicknesses, hypersonic flow field pressures, and temperatures. Static characteristics, modal and thermal modal characteristics of an inflatable reentry vehicle under the influence of nonlinear factors. Combined with the actual flight trajectory of the inflatable reentry vehicle, the calculation method of fluid-solid one-way coupling and heat-solid one-way coupling has been successfully introduced into the nonlinear structural dynamics simulation model, which truly expresses the impact of the change of internal pressure gas parameters on the inflatable reentry vehicle. Influence laws of the aircraft static characteristics and modal and thermal modal characteristics. The research results of this patent are expected to solve the problem of insufficient consideration of flow field nonlinearity and material nonlinearity in the existing research on the structural dynamics of inflatable reentry vehicles, and can provide useful information for the conformal design and structural safety design of inflatable reentry vehicles. value reference.

Description

Technical field [0001] The present invention relates to an inflatable re-entry aircraft structural kinetic analysis method and system that considers nonlinear effects, belonging to spacecraft re-entry and return. Background technique [0002] Inflatable re-enter the aircraft has the advantages of payload ratio, small launch volume, flexible maneuverability, and improve spacecraft re-return ability and possibly become a new type of space. Inflatable rehabilitates are launched, in a folded state in the track, and re-return the air deceleration and thermal protection function. Space inflatable re-entering the airway After entering the atmosphere, it is necessary to withstand the airflow impact of the ultra-high-speed speed and the huge aerodynamic heat load, the flow of nonlinearity, the material nonlinear to the inflated reintegration of the aircraft cannot be ignored. At present, there are many low-speed aircraft such as airship and inflatable aircraft as a research object, and th...

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Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the problem of insufficient consideration of the influence of flow field nonlinearity and material nonlinearity in the numerical research of the existing structural dynamics of the inflatable reentry vehicle in the prior art, and propose an inflatable reentry vehicle considering the nonlinear influence. The structural dynamics analysis method and system of the inflatable re-entry vehicle, combined with the actual flight trajectory of the inflatable re-entry vehicle, through the introduction of the calculation method of fluid-solid one-way coupling and thermo-solid one-way coupling in the structural dynamics model, the inflation pressure , film thickness, hypersonic flow field pressure, and temperature. The accurate description of the static characteristics, modal and thermal modal characteristics of the inflatable reentry vehicle under the influence of nonlinear factors such as Conformal design and structural safety design of aircraft provide valuable reference

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