A method for manufacturing a low-speed flutter wind tunnel model of an airfoil

Abstract

The invention belongs to the technical field of design and manufacture of composite material structures and aeroelasticity test models of aircraft wind tunnels, and relates to a manufacturing method of a low-speed flutter wind tunnel model of a wing. The invention provides a method for manufacturing a low-speed flutter wind tunnel model of a wing, which is a novel method for manufacturing a wing flutter model, which can effectively improve the structural efficiency, reduce the weight of the model structure, and ensure the geometric accuracy of the model shape and the model stiffness. Accurate and more effective simulation of the flutter characteristics of composite wings. The key points of the present invention and the points to be protected: the wing box skin, wing ribs and front and rear webs are all made of composite materials, and the flutter model structure of the skin is mainly load-bearing; the manufacturing process of the composite material flutter model wing box; flutter The material selection and manufacturing process of the vibration model counterweight.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of a composite material structure and an aircraft wind tunnel aeroelasticity test model, and relates to a method for manufacturing a wing low-speed flutter wind tunnel model. Background technique [0002] Introduction to Flutter Wind Tunnel Test Background [0003] Flutter is a kind of self-excited vibration formed by the interaction of aerodynamic force, inertial force and elastic force of an aircraft moving in the airflow. If the flight speed exceeds the flutter speed, the aircraft will suffer structural damage. The aircraft flutter model is mainly used in wind tunnel tests to determine the flutter critical speed of the aircraft (whole or component), to study the influence of structural parameters on the flutter characteristics, to check the flutter characteristics of the designed aircraft, and to verify the theoretical calculation method. The flutter model needs to have dynamic ...

AI Technical Summary

Problems solved by technology

This type of model is mainly composed of metal beams and skins. The metal beams are in the form of single beams or multi-beams. They are the main load-bearing components of the scale model, providing most of the rigidity and strength, and are used for the combination of skins and ribs. Due to the aerodynamic dimension and aerodynamic force transmission, it contributes little to the stiffness of the model, so the structural efficiency is low; at the same time, the connection between the metal beam frame, the wing rib and the skin of this kind of scale model needs to be repositioned and clamped, and the manufacturing error is difficult to eliminate , which is not conducive to the accurate simulation of the aerodynamic shape and affects the accuracy of the test; the counterweight is generally made of lead, which is slightly toxic, and the mass of the counterweight is large, which is not easy to install and test

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