Point-adding method for hypersonic aerodynamic-thermal reduction model based on fuzzy clustering
A reduced-order model and fuzzy clustering technology, applied in the aerospace field, can solve problems such as the contradiction between efficiency and precision, and achieve the effect of great flexibility and good versatility
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[0023] The method of adding points to hypersonic aerothermal reduction model based on fuzzy clustering, such as figure 1 As shown, the specific steps are as follows:
[0024] Step 1. Taking the F-104 wing, a typical lifting surface commonly used in aerodynamic thermoelastic analysis, as the research object, the geometric model of the wing structure is shown in figure 2 , for a typical hypersonic vehicle lift surface aerodynamic thermal reduction model, the variables are determined as the flight Mach number, flight altitude and flight angle of attack, and the design space B is shown in Table 1.
[0025] Table 1 Design variables and design space
[0026]
[0027] In this example, the response value in the aerothermal analysis is the surface temperature of the wing, which is calculated by the CFD commercial software CFD-Fastran, and the calculation fluid grid model of the lift surface is shown in image 3 .
[0028] Step 2: Use the Latin hypercube method to generate 30 ini...
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