Post-flutter response of a flexible cantilever plate in low subsonic flows |
| |
| Institution: | 1. Department of Aerospace Engineering, Sharif university of Technology, Tehran, P.O.Box 11155-8639, Iran;2. Department of Mechanical Engineering, Middle East Technical University, 06800 Ankara, Turkey;1. Department of Electrical Engineering, University of California, Los Angeles, CA, United States;2. Department of Mathematics, The Petroleum Institute, Abu Dhabi, United Arab Emirates;3. Department of Statistics, Rice University, 2125 Duncan Hall, 6100 Main, Houston, TX 77005, United States;4. The Boeing Company, Huntsville, AL, United States;1. College of Power and Energy Engineering, Harbin Engineering University, Harbin, People''s Republic of China;2. Wuhan Second Ship Design and Research Institute, Wuhan, People''s Republic of China;3. Departamento de Engenharia Mecânica UNESP, Ilha Solteira, Brazil;1. China Ship Scientific Research Center, Wuxi 214082, People’s Republic of China;2. State Key Laboratory of Deep-sea Manned Vehicles, Wuxi 214082, People’s Republic of China;3. National Key Laboratory on Ship Vibration and Noise, Wuxi 214082, People’s Republic of China |
| |
| Abstract: | Numerical simulations on the post-flutter response of a flexible cantilever plate are carried out by establishing a nonlinear aeroelastic model. The present study shows that chaotic movements may exist in the three-dimensional panel flutter problems in case of low subsonic flows. In the analysis, time traces, phase-plane plots, Poincare maps as well as power spectral densities are employed to identify the dynamic behavior of the system. It is observed that the plate undergoes period-1, period-3 and non-periodic motions with the increase of inflow velocity. The post-flutter behavior is dominated by both geometric and aerodynamic nonlinearities. Numerical results show that wingtip vortexes are in fact an important source of aerodynamic nonlinearities, which have not been fully studied before. The study also provides a criterion on how to choose a coupling strategy in the nonlinear aeroelastic simulation of a low-aspect-ratio flexible structure in low subsonic flows when the dominant nonlinear effect is different in the post-flutter response. |
| |
| Keywords: | Cantilever plate Low subsonic flow Chaotic movement Coupling strategy |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
