Random Wave Simulation Considering Wave Groups

Mase, Hajime; Kita, Naoki; Iwagaki, Yuichi

doi:10.1080/05785634.1983.11924359

Cited by 9 publications

(3 citation statements)

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“…The purpose of this paper is to examine the following characteristics of run-up of random waves on gentle slopes experimentally by using random waves with two different groupiness factors defined by Funke and MansardD, but with the same spectrum of Pierson-Moskowitz type: (1) the run-up wave energy spectrum, (2) the ratio of the number of run-up waves to that of incident waves, (3) the relationship between the representative run-up height, the deep-water wave steepness and the beach slope, (4) the run length of run-up heights, and (5) the effect of wave grouping on representative run-up heights.…”

Section: Introductionmentioning

confidence: 99%

Run-Up of Random Waves on Gentle Slopes

Mase

Iwagaki

1984

Int. Conf. Coastal. Eng.

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This paper investigates the following characteristics of run-up of random waves on gentle slopes experimentally: (1) the run-up wave energy spectrum, (2) the ratio of the number of run-up waves to that of incident waves, (3) the relationship between the representative run-up height, the deep-water wave steepness and the beach slope, (4) the run length of run-up heights, and (5) the effect of wave grouping on representative run-up heights. Main results are summarized in the chapter of conclusions.

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Section: Introductionmentioning

confidence: 99%

Run-Up of Random Waves on Gentle Slopes

Mase

Iwagaki

1984

Int. Conf. Coastal. Eng.

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“…Step-by-step details for calculating a SIWEH and synthesizing a corresponding time series realization are given by Mansard (1979, 1980) and by Mase, Kita, and Iwagaki (1983), and interested readers should consult these references. In addition, Funke and Mansard (1987) provided summary arguments and examples illustrating the usefulness of the SIWEH approach to irregular wave synthesis.…”

Section: • the Fourier Transform E(f) Of The Siweh Function E(t)mentioning

confidence: 99%

“…But they also warned that the method could produce laboratory waves that would be unrealistic in nature. Mase, Kita, and Iwagaki (1983) employed the SIWEH method to investigate statistical parameters of simulated irregular wave trains having the same spectral shape but different wave grouping characteristics. They also examined field data wave grouping in terms of the grouping factor given in Eqn.…”

Section: • the Fourier Transform E(f) Of The Siweh Function E(t)mentioning

confidence: 99%

Laboratory Wave Generation

Hughes¹

1993

Advanced Series on Ocean Engineering

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Wave generation capability has evolved from the time when researchers were completely at the mercy of a limited technology to the present where the capability of wave generators and computers exceeds the current understanding of wave dynamic processes." ...Ed Funke and Etienne Mansard (1987) ' This paper was the source of the quotation opening this chapter. 2 English translation by M. Pilch. Physical Models and Laboratory Techniques in Coastal Engineering Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/25/15. For personal use only. 7.2. TWO-DIMENSIONAL GOVERNING EQUATIONS Physical Models and Laboratory Techniques in Coastal Engineering Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/25/15. For personal use only. CHAPTER 7. LABORATORY WAVE GENERATION Multiplying both sides of Eqn. 7.49 by cosh[ki(h + z)], integrating the equation between z = -h and z = 0, and arranging gives A -USo , f °h f (z) cosh[kl (h + z)] dz (7.50) 2k1 f °h cosh2 [kl (h + z)] dz All of the summation terms have gone to zero because of orthogonality considerations given by the Sturm-Liouville theory (Dean and Dalrymple 1984). Similarly, multiplying Eqn. 7.49 by cos[k3, (z + h)] and performing the integration causes the progressive wave term to go to zero yieldingThe final step is to formulate the solution for the first-order wavemaker problem. The sea surface elevation in the wave tank is found by substituting the velocity potential given by Eqn. 7.46 into the first-order dynamic free surface boundary condition given by Eqn. 7.22 and evaluating the boundary condition at z = 0, i.e., 171(x,t) = oA cosh( klh)cos( klx -at) + 9+ sin(at ) E Cn ek i n x cos ( k3. h) (7.52) n =1 9Far from the wave board all of the summation terms will disappear, and to first order , the sea surface will be represented as the progressive wave solution 171(x,t ) = 2 cos ( klx -at ) (7.53)where H is the wave height . Equating Eqns . 7.52 and 7. 53 and discarding the series terms gives the basic wavemaker relationship H = 2o-A cosh(klh) (7.54) 9where A is given by Eqn . 7.50. Solution for a specific type of wavemaker is found by substituting for f ( z) in Eqn . 7.50 and solving the integrals. Physical Models and Laboratory Techniques in Coastal Engineering Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/25/15. For personal use only. P. _ a tanh kh l smh kh + 1 ( 1 -cosh kh) ( pghSo l kh (si.nh 2kh + 2kh l L kh ] z T J Physical Models and Laboratory Techniques in Coastal Engineering Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/25/15. For personal use only.

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Wave group analysis of natural wind waves based on modulational instability theory

Mase

Iwagaki

1986

Coastal Engineering

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Random Wave Simulation Considering Wave Groups

Cited by 9 publications

References 1 publication

Run-Up of Random Waves on Gentle Slopes

Run-Up of Random Waves on Gentle Slopes

Laboratory Wave Generation

Wave group analysis of natural wind waves based on modulational instability theory

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