scholarly journals ACCURATE PREDICTION OF NON-LINEAR WAVE FORCES: PART II (RESPONDING CYLINDER)

1998 ◽  
Vol 12 (3) ◽  
pp. 487-498 ◽  
Author(s):  
S.A. Billings ◽  
P.K. Stansby ◽  
A.K. Swain ◽  
M. Baker
Keyword(s):  
Accurate Prediction ◽  
Wave Forces ◽  
Linear Wave ◽  
Non Linear

scholarly journals ACCURATE PREDICTION OF NON-LINEAR WAVE FORCES: PART I (FIXED CYLINDER)

1998 ◽  
Vol 12 (3) ◽  
pp. 449-485 ◽  
Author(s):  
A.K. Swain ◽  
S.A. Billings ◽  
P.K. Stansby ◽  
M. Baker
Keyword(s):  
Accurate Prediction ◽  
Wave Forces ◽  
Linear Wave ◽  
Non Linear ◽  
Fixed Cylinder

scholarly journals NON-LINEAR WAVE FORCES ON FLOATING BREAKWATERS

1982 ◽  
Vol 1 (18) ◽  
pp. 120
Author(s):  
C.T. Niwinski ◽  
M. De St. Q. Isaacson
Keyword(s):  
Wave Train ◽  
Wave Forces ◽  
Linear Wave ◽  
Floating Bodies ◽  
Time Stepping ◽  
Non Linear ◽  
Force Curves ◽  
Accuracy Of Results ◽  
Floating Breakwaters ◽  
Linear Nature

A non-linear numerical method for calculating wave forces on floating bodies has been developed by Isaacson (1981). The time stepping procedure is programmed for a computer solution, and an incident wave train is time stepped past a fixed two-dimensional rectangular breakwater. The influence of various input parameters on the accuracy of results is investigated, and optimal values of the parameters are determined. The optimal numerical parameters are used to generate force and transmission coefficient results, which are compared to the results of other published studies. The method is shown to compare favorably with other results, with the non-linear nature of the method being clearly demonstrated by the different force curves produced by varying the wave height.

Non-Linear Wave Forces Acting on a Body of Arbitrary Shape Slowly Oscillating in Waves

2005 ◽  
Author(s):  
Yasunori Nihei ◽  
Takeshi Kinoshita ◽  
Weiguang Bao
Keyword(s):  
Low Frequency ◽  
The Body ◽  
Coordinate Frame ◽  
Wave Forces ◽  
Linear Wave ◽  
Wave Loads ◽  
Low Frequency Oscillation ◽  
Wave Drift ◽  
Non Linear ◽  
Low Frequency Motion

In the present study, non-linear wave loads such as the wave drift force, wave drift damping and wave drift added mass, acting on a moored body is evaluated based on the potential theory. The body is oscillating at a low frequency under the non-linear excitation of waves. The problem of interaction between the low-frequency oscillation of the body and ambient wave fields is considered. A moving coordinate frame following the low frequency motion is adopted. Two small parameters, which measure the wave slope and the frequency of slow oscillations (compared with the wave frequency) respectively, are used in the perturbation analysis. So obtained boundary value problems for each order of potentials are solved by means of the hybrid method. The fluid domain is divided into two regions by an virtual circular cylinder surrounding the body. Different approaches, i.e. boundary element method and eigen-function expansion, are applied to these two regions. Calculated nonlinear wave loads are compared to the semi-analytical results to validate the present method.

Sign in / Sign up

Export Citation Format

Share Document