MIT2_017JF09_p04

# MIT2_017JF09_p04 - 4 BRETSCHNEIDER SPECTRUM DEFINITION 4...

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Unformatted text preview: 4 BRETSCHNEIDER SPECTRUM DEFINITION 4 Bretschneider Spectrum Definition The formula for the Bretschneider (one-sided) ocean wave spectrum is 5 S ( ω ) = ω 4 m 16 4 H 2 5 5 1 / 3 e- ω m / 4 ω 4 ω where ω is frequency in radians per second, ω m is the modal (most likely) frequency given wave, and H 1 / 3 is the significant wave height. Make a single figure that sho Bretschneider spectrum ( S as a function of ω ) for these cases: SeaState 2 π/ω m , sec H 1 / 3 , m 2 6.3 0.3 3 7.5 0.9 4 8.8 1.9 5 9.7 3.3 6 12.4 5.0 Here is the MATLAB code I used and the resulting figure: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % 2.017 Homework 1. Bretschnieder Spectrum. % FSH MIT Mechanical Engineering clear all; figure(1);clf;hold off; hold on; % note: hold is on so we can % figures % show the data from the table in the problem SSvec = [2 3 4 5 6] ; % sea states wmvec = 2*pi*ones(size(SSvec)) ./ [6.3 7.5 8.8 9.7 12.4] ; % modal frequencies Hsigvec = [0.3 0.9 1.9 3.3 5.0] ; % significant wave heightsHsigvec = [0....
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MIT2_017JF09_p04 - 4 BRETSCHNEIDER SPECTRUM DEFINITION 4...

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