On the maximum amplitude for a freely vibrating cylinder in cross-flow
The response of a freely oscillating circular cylinder ("free vibration") in cross-flow has been studied experimentally using controlled magnetic eddy current to provide variable damping. In general, the nondimensional response amplitude, A*, and dominant frequency, ω*, depend on the Reynolds number, Re, and the nondimensional mass, m*, damping, b*, and elasticity, k*, of the system. The main objective of this study is to characterize the maximum amplitude that is achieved for a given system as cross-flow velocity is varied. We find that this maximum amplitude, A*_(max), occurs within a small range of values of k*_(eff) = ω*^2m* + k*. For values of Reynolds number in the range 525
Copyright © 2005 Elsevier Ltd. Received 20 May 2005; accepted 25 July 2005. Available online 4 October 2005. Thanks to Prof. Morteza Gharib for his involvement throughout this research effort. We gratefully acknowledge the financial support provided by ONR Grant # N00014-94-1-0793. Scholarship support was provided by the National Science Foundation graduate fellowship program.