Method for solving linear flutter speed of three-dimensional wing based on multi-body system transfer matrix method

Abstract

The invention discloses a method for solving the linear flutter speed of a three-dimensional wing based on a multi-body system transfer matrix method. The method comprises the following steps: deriving a bending-torsion coupling beam transfer matrix of the wing based on the multi-body system transfer matrix method; establishing a total transfer equation of the wing, and solving and obtaining the inherent frequency and the vibration mode of the wing; according to the Theodorsen unsteady aerodynamic force theory, establishing the relation between wing vibration displacement and aerodynamic force; establishing a body dynamics equation of the wing, and converting the body dynamics equation into a frequency domain to obtain a flutter frequency domain model of the wing; and performing frequencydomain solving on the wing flutter frequency domain model to obtain the flutter speed of the wing. The method can achieve the quick solving of the flutter speed of the wing.

Description

technical field [0001] The invention belongs to the technical field of aeroelastic simulation, and in particular relates to a method for solving the linear flutter velocity of a three-dimensional wing based on a multi-body system transfer matrix method. Background technique [0002] With the continuous development of the aviation industry and the continuous improvement of the flight speed of the aircraft, the aeroelasticity problem has been paid more and more attention by people. In the early days of the development of aircraft design technology, there were many serious accidents caused by aeroelasticity. After decades of development, aeroelasticity has become more and more mature, and the corresponding analysis methods have played an important role in the field of aerospace. Every step in the research of aeroelasticity can greatly promote the development of aviation technology, the understanding of aeroelasticity is also deepening, and the ability to solve aeroelasticity i...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and proposes a method for solving the linear flutter velocity of a three-dimensional wing based on the multi-body system transfer matrix method, which solves the problem of low efficiency and slow speed in solving the vibration characteristics of the wing , to realize the fast solution of wing flutter velocity

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