A Flutter Model Design Method for Cylindrical Objects Without Independent Counterweight Space

Abstract

The invention belongs to the field of aircraft design, and relates to a method for designing a flutter model of a cylindrical object without an independent counterweight space. The frequency and modal similarity between the vibration model and the target object are above 95%; second, the design shape: the aerodynamic shape of the flutter model and the target object are consistent; third, the design quality: the mass, center of mass and The similarity of the moment of inertia is above 95%, and the shape-shifting counterweight replaces part of the design shape. The beneficial effect is: while taking into account the original design idea, the counterweight space is expanded, the counterweight mass is increased, and the flutter model of the cylindrical object without independent counterweight space has design feasibility.

Description

technical field [0001] The invention belongs to the field of aircraft design and relates to a method for designing a flutter model of a cylindrical object without an independent counterweight space. Background technique [0002] In the field of aircraft design, the design method of the flutter model of the cylinder without independent counterweight space is improved. Generally, when designing the flutter model, the step of designing the mass, that is, the counterweight, is carried out separately, and the model has an independent counterweight space. How much counterweight is needed can be directly added to the corresponding counterpoint on the flutter model. [0003] The disadvantage of the previous flutter model design is that the space and quality of the model need to be coordinated, that is, there is enough balance weight margin and enough space for weight balance. However, when the space and quality of the model are not coordinated, especially when there is insufficient...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the previous flutter model design is that the space and quality of the model need to be coordinated, that is, there is enough counterweight margin and enough counterweight space

However, when the space and quality of the model are not coordinated, especially when there is insufficient counterweight space due to excessive counterweight allowance, the previous design method will not work.

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