TY - GEN
T1 - Parametric study of two degree-of-freedom vortex-induced vibrations of a cylinder in a two-dimensional flow
AU - Lucor, D.
AU - Triantafyllou, M. S.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - We derive accurate, continuous response surfaces of two degree-offreedom vortex- induced vibrations (VIV) of flexibly mounted cylinders, for a wide range of transverse and in-line natural frequencies, to identify the parametric sensitivity of the VIV response. The flow is assumed to be two-dimensional and the Reynolds number equal to 1,000; the structure has the same low damping for the inline and transverse motions, while the transverse and in-line mass ratios are equal. The VIV response is studied within a wide range of the transverse natural frequency around the synchronization region. The variation of the in-line natural frequency is chosen to be larger than for the transverse natural frequency, in order to study multimodal response. The numerical technique uses a stochastic generalized Polynomial Chaos representation coupled to a spectral element based deterministic solver; hence the response is obtained as a continuous function of the parameters.
AB - We derive accurate, continuous response surfaces of two degree-offreedom vortex- induced vibrations (VIV) of flexibly mounted cylinders, for a wide range of transverse and in-line natural frequencies, to identify the parametric sensitivity of the VIV response. The flow is assumed to be two-dimensional and the Reynolds number equal to 1,000; the structure has the same low damping for the inline and transverse motions, while the transverse and in-line mass ratios are equal. The VIV response is studied within a wide range of the transverse natural frequency around the synchronization region. The variation of the in-line natural frequency is chosen to be larger than for the transverse natural frequency, in order to study multimodal response. The numerical technique uses a stochastic generalized Polynomial Chaos representation coupled to a spectral element based deterministic solver; hence the response is obtained as a continuous function of the parameters.
KW - Sensitivity analysis
KW - Surface response
KW - Two degree-of-freedom motion
KW - VIV
UR - https://www.scopus.com/pages/publications/84861135471
U2 - 10.1007/978-1-4020-9898-7_19
DO - 10.1007/978-1-4020-9898-7_19
M3 - Conference contribution
AN - SCOPUS:84861135471
SN - 9781402098970
T3 - Solid Mechanics and its Applications
SP - 223
EP - 233
BT - IUTAM Symposium on Unsteady Separated Flows and their Control - Proceedings of the IUTAM Symposium "Unsteady Separated Flows and their Control"
T2 - IUTAM Symposium on Unsteady Separated Flows and their Control
Y2 - 18 June 2007 through 22 June 2007
ER -