Whisker enhanced photosensitive resin aero-elastic high-speed wind tunnel test model

Abstract

The invention relates to development of high-speed wind tunnel test models, in particular to a whisker enhanced photosensitive resin aero-elastic high-speed wind tunnel test model. The technical scheme is that the whisker enhanced photosensitive resin aero-elastic high-speed wind tunnel test model comprises a framework and a skin externally wrapped on the framework, wherein the skin is made of photosensitive resin filled with whiskers, and the whisker content occupies 6% of mass of the photosensitive resin. The framework comprises a beam frame and a girder, the skin is externally wrapped on beam frame and the girder which are made of photosensitive resin filled with whiskers, and the whisker content occupies 6% of mass of the photosensitive resin. The whisker enhanced photosensitive resin aero-elastic high-speed wind tunnel test model is characterized in that the framework comprises the beam frame and the girder which are made of high strength metal materials, the whiskers are filled into the photosensitive resin, and the skin or the beam frame and the girder are produced in a photo-curing forming process. The test model is similar to an aircraft in shape, rigidity distribution and mass distribution and is identical to the aircraft in the vibration mode, and the test model is simple, fast and convenient to produce and low in cost.

Description

technical field [0001] The invention relates to a high-speed wind tunnel test model, in particular to a high-speed wind tunnel test model made of whisker-enhanced photosensitive resin. Background technique [0002] With only a rigid wind tunnel model with a similar shape, the wind tunnel test cannot simulate the aerodynamic response characteristics of the aircraft, that is, it cannot reflect the aeroelastic (referred to as aeroelastic) phenomena of the aircraft (such as flutter, deformation divergence, chattering, control reverse effect, etc.) and gust response, etc.), and air bombs have a huge impact on the maneuverability and safety of the aircraft. Therefore, military aircraft originate from the development direction of high maneuverability, high alertness, and high stealth. For reasons such as flight safety and airworthiness certification, (large) civilian aircraft, whether actively using or avoiding the aeroelastic phenomenon, achieve optimal stiffness and The distribu...

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Problems solved by technology

[0007]① Composite materials control the structural dynamics of the airfoil through the directionality of stiffness, and co-cure to achieve overall forming, but the lay-up is asymmetrical and exists in a given direction Differences in stiffness and expansion characteristics can cause warping, deformation or even delamination. In addition, the aeroelastic test model of the aircraft is a thin-walled structure with a beam frame bearing force, so it is difficult to eliminate thermal stress and thermal strain; and studies have shown that supercritical airfoils The shape of the section has an important influence on the position and strength of the transonic shock wave, so slight warpage or thermal strain of the model will have a great influence on the transonic flutter velocity

[0008]② The mechanical performance analysis of composite materials must consider factors such as reinforcement structure, manufacturing process and environment, and traditional aeroelastic numerical simulation methods are not competent

[0009]③ The aeroelastic wind tunnel test model is produced in a single piece and in small batches, which leads to a low degree of automation in the process of making composite materials and errors in the dynamic response indicators of the manufactured model large and unstable

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