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- W2103177923 abstract "The nonlinear aspects that lead to the flutter of an HSCT Flexible Semispan Model are analyzed. A hierarchy of spectral moments was used to determine the characteristics of the aerodynamic loading and structural strains and motions. The results show that the frequency of the bending motion of the wing varied significantly as the Mach number was increased between 0.90 and 0.97. Examination of the pressure coefficients in terms of mean value and fluctuations showed that the flow characteristics over the wing changed significantly around a Mach number of 0.97. A strong shock was identified near the trailing edge. Nonlinear analysis of the pressure fluctuations, under these conditions, showed nonlinear coupling involving low-frequency components at pressure locations where the mean value was at a local minimum. This shows that the aerodynamic forces acting on the model had nonlinearly coupled frequency components. The results presented here show how nonlinear analysis tools can be used to identify nonlinear aspects of the flutter phenomenon which are needed in the validation of nonlinear computational methodolo" @default.
- W2103177923 created "2016-06-24" @default.
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- W2103177923 date "2003-01-01" @default.
- W2103177923 modified "2023-09-23" @default.
- W2103177923 title "Nonlinear Flutter Aspects of the Flexible HSCT Semispan Model" @default.
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