Method for analyzing hot pneumostatic elasticity of hypersonic aerocraft

A technology of hypersonic speed and analysis method, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of low efficiency and long calculation time, achieve high efficiency, fast calculation speed, and improve the effect of calculation accuracy

Active Publication Date: 2013-10-23
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology

[0004] In the iterative solution of thermostatic aeroelasticity, if the aerodynamic force and aerodynamic heat are all calculated by one CFD method, and both of them participate in the iteration, the calculation time will be long and the efficiency will be very low

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  • Method for analyzing hot pneumostatic elasticity of hypersonic aerocraft
  • Method for analyzing hot pneumostatic elasticity of hypersonic aerocraft
  • Method for analyzing hot pneumostatic elasticity of hypersonic aerocraft

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0020] A hypersonic vehicle thermostatic aeroelastic analysis method of the present invention, the steps are as follows:

[0021] (1) According to the initial shape of the aircraft, establish the structure and aerodynamic analysis model of the hypersonic aircraft; the aerodynamic analysis model refers to the aerodynamic shape model of the hypersonic aircraft composed of triangular facets; the structural analysis model refers to the limited structure of the aircraft The element analysis model is to assign corresponding material properties to each part of the aircraft, and then divide the aircraft structure into finite element elements, such as shell elements, body elements, etc., and impose fixed support constraints at the center of gravity.

[0022] (2) Use engineering methods to calculate aerodynamic forces and aerodynamic heat for hypersonic vehicles; ...

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Abstract

The invention discloses a method for analyzing hot pneumostatic elasticity of a hypersonic aerocraft, which comprises the following steps: (1) according to the original outline of the hypersonic aerocraft, building a structural and pneumatic analytical model of the hypersonic aerocraft; (2) calculating the aerodynamic force and aerodynamic heat of the hypersonic aerocraft by utilizing the engineering approach; (3) according to the heat flux on the surface of the hypersonic aerocraft, calculating the surface temperature and the temperature field of the structure of the hypersonic aerocraft through heat conduction analysis; (4) loading the aerodynamic force load and the temperature field calculated in the step (3) into the structural analytical model built in the step (1), and calculating the elastic deformation of the hypersonic aerocraft; (5) updating the outline node coordinates in the structural and pneumatic analytical model of the hypersonic aerocraft by utilizing the calculated elastic deformation of the hypersonic aerocraft, determining the maximum displacement point of the deformation, judging whether the deformation rate of the maximum displacement point is less than the preset threshold value or not, if yes, regarding the aerodynamic force, aerodynamic heat and elastic deformation of the hypersonic aerocraft currently calculated as the final analysis result, otherwise, moving to the step (2) for loop execution.

Description

technical field [0001] This method is used for thermogas bomb analysis of hypersonic vehicles. Background technique [0002] Under the background of developing high-tech defense weapons and exploring space, various hypersonic vehicles are constantly emerging. The aerodynamic heating caused by hypersonic flight brings many challenges to the design of such aircraft, and thermoaeroelasticity is one of the key issues. Aerodynamic heating leads to changes in material properties, aggravates structural deformation, generates thermal stress inside, changes structural modes, brings complex effects on the original aeroelastic system, and even causes destructive instability. Therefore, in-depth research on the thermoaeroelasticity of hypersonic vehicles has important application value. [0003] For a multidisciplinary coupling problem such as thermogas bombs, researchers generally adopt loosely coupled ideas and analytical methods of hierarchical solution, focusing on the influence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 王永志李锋张旭王鹏张卫民金鑫
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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