Manufacturing method for low-speed wing flutter wind tunnel model

Abstract

The invention belongs to the technical field of design and manufacturing of composite material structures and aircraft wind tunnel aeroelastic test models, and relates to a manufacturing method for a low-speed wing flutter wind tunnel model. The invention provides the manufacturing method for the low-speed wing flutter wind tunnel model, which is a novel manufacturing method for a wing flutter model, and can effectively improve structural efficiency, reduce structural weight of the model, ensure accuracy of geometric precision, model rigidity and quality characteristics of a model shape and more effectively simulate flutter characteristics of a composite wing. Key points and protective points of the invention are that wing box skin, wing ribs and front and rear webs are all made from composite materials, and a flutter model structure form of bearing force mainly by the skin is adopted; a manufacturing process for a composite flutter model wing box is provided; and a material selection and manufacturing process for a counterweight of the flutter model is provided.

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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