DESIGN, MANUFACTURE AND FREQUENCY EXPERIMENT OF A NOVEL FLUTTER MODEL FOR AGARD WING 445.6 WITH STRUCTURE-SIMILARITY

摘要

As a famous reference model over the world, AGARD WING 445.6 can be commonly used to test the accuracy of many numerical methods or codes for flutter computation. At the beginning of the present work, No.3 model with weakened stiffness was modelled by finite element method to prepare a basis of the AGARD WING 445.6 model design. Then a reference structure-similarity flutter model of AGARD WING 445.6 was designed and manufactured based on structure dynamic similarity principle. The actual dynamic pressure range of a pressurized intermittent wind tunnel in China was considered during the design process. After a frequency experiment of this model was completed, numerical modal analysis and flutter computation of this model were also completed by employing MSC/Nastran software. It was found from the experimental and computed results that the reference structure-similarity model of AGARD445.6 WING in this paper can generally provide consistent basic modes and flutter characteristic compared to the original structure. So the proposed model can satisfy the requirement of the pressurized intermittent wind tunnel in China, and the corresponding experimental results of this reference model can be used to check many numerical methods or codes for flutter computation.