commitandpush
Student
- May 9, 2022
- 5
According to the Nastran manual, to analyze the flutter with the pk method, the reduced frequency must be entered with the mkaero command. When entering mkaero, I know that it can be obtained by entering the mode frequency from sol103 and v_min and v_max.
1. If you look at .f06 analyzed by the solver, you will also find a reduced frequency called KFREQ or 1/KFREQ. Both are reduced frequencies, what is the difference between mkaero and KFREQ?
I understood that the reduced frequency provided by mkaero is provided to create a modal aerodynamic damping/stiffness matrix in the fundamental equation.
2. What is the purpose of KFREQ to analyze? flutter results using only damping, velocity, and frequency when drawing vg and vf graphs.
1. If you look at .f06 analyzed by the solver, you will also find a reduced frequency called KFREQ or 1/KFREQ. Both are reduced frequencies, what is the difference between mkaero and KFREQ?
I understood that the reduced frequency provided by mkaero is provided to create a modal aerodynamic damping/stiffness matrix in the fundamental equation.
2. What is the purpose of KFREQ to analyze? flutter results using only damping, velocity, and frequency when drawing vg and vf graphs.
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