Author(s): R. T. Hudspeth; L. E. Borgman; J. M. Grassa
Linked Author(s):
Keywords: No Keywords
Abstract: A conditional simulation may be defined as a numerical method for embedding a deterministic sequence of waves or wave groups into a random wave simulation having a specified target variance spectrum. The conditional simulation may be performed either in the time domain or in the frequency domain. In the time domain, the procedure is direct and easy to understand but it is time-consuming. In the frequency domain, the procedure is more efficient when Finite Fourier Transform (FFT) algorithms are used. Numerical stability of conditional simulation is affected by: 1) the length of embedded sequence relative to the unconditional sequence; 2) compatibility of the embedded sequence to the target spectrum; and 3) too small discrete time step. The conditional simulation of the water surface elevation may be applied to motion of a planar wavemaker in order to generate conditional simulation in a 2-D wave flume.
Year: 1997