TY - GEN
T1 - AN EFFICIENT TIME-DOMAIN MODEL TO SIMULATE PARAMETRIC RESONANCES IN A FLOATING BODY FREE TO MOVE IN SIX DEGREES OF FREEDOM
AU - Kurniawan, Adi
AU - Tran, Thanh Toan
AU - Yu, Yi Hsiang
N1 - Publisher Copyright:
Copyright © 2022 by ASME and The United States Government.
PY - 2022
Y1 - 2022
N2 - We present a computationally efficient time-domain model capable of simulating parametric resonances in a floating body in waves. The model assumes all wave forces to be linear, but the inertia and restoring forces acting on the body are expanded to second order in body motions. The simulation speed on a standard computer is approximately 40 times faster than real time. The model is applied to a soft-moored floating axisymmetric body which absorbs energy through heave, but is otherwise free to move in six degrees of freedom. Under certain conditions, we show that the body undergoes parametric resonance with large amplitudes not only in surge and pitch, but also in sway, roll, and yaw, provided it is given some small initial displacement in one of these out-of-plane modes. The predictions are confirmed by simulations using state-of-the-art nonlinear Froude-Krylov and computational fluid dynamics models.
AB - We present a computationally efficient time-domain model capable of simulating parametric resonances in a floating body in waves. The model assumes all wave forces to be linear, but the inertia and restoring forces acting on the body are expanded to second order in body motions. The simulation speed on a standard computer is approximately 40 times faster than real time. The model is applied to a soft-moored floating axisymmetric body which absorbs energy through heave, but is otherwise free to move in six degrees of freedom. Under certain conditions, we show that the body undergoes parametric resonance with large amplitudes not only in surge and pitch, but also in sway, roll, and yaw, provided it is given some small initial displacement in one of these out-of-plane modes. The predictions are confirmed by simulations using state-of-the-art nonlinear Froude-Krylov and computational fluid dynamics models.
UR - http://www.scopus.com/inward/record.url?scp=85148486907&partnerID=8YFLogxK
U2 - 10.1115/IMECE2022-94502
DO - 10.1115/IMECE2022-94502
M3 - Conference contribution
AN - SCOPUS:85148486907
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Energy
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2022 International Mechanical Engineering Congress and Exposition, IMECE 2022
Y2 - 30 October 2022 through 3 November 2022
ER -