Investigation of Vibration Characteristics of Wind Tunnel Rigid Model Based on Material Optimization

Vibration issues in wind tunnel experiments involving rigid models significantly impact the accuracy of experimental data and structural safety. This paper aims to improve the vibration characteristics of wind tunnel test models through material optimization. By reducing model weight and adjusting weight distribution, the low-order natural frequencies of the model are optimized to avoid resonance phenomena. In this study, a high aspect ratio low-speed wind tunnel test model is chosen as the research object, and a comparative analysis is conducted between a full-metal model and an optimized carbon fiber shell model using modal analysis. Modal calculations and structural strength analyses are performed using FEM software to evaluate the vibration characteristics and structural safety of the models. The research findings demonstrate that material optimization can significantly enhance the vibration performance of wind tunnel test models, thereby improving the accuracy of experimental data and the structural safety. By improving the vibration characteristics of wind tunnel test models, researchers can obtain more accurate data, improving our understanding of the principles of fluid dynamics and advancing our ability to design more efficient and effective aircraft and other flying objects.