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<!-- 2020 - 11 - 12 jeu. 10:27 -->
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< meta http-equiv = "Content-Type" content = "text/html;charset=utf-8" / >
< title > Measurements< / title >
< meta name = "generator" content = "Org mode" / >
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< meta name = "author" content = "Dehaeze Thomas" / >
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< a accesskey = "h" href = "../index.html" > UP < / a >
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< a accesskey = "H" href = "../index.html" > HOME < / a >
< / div > < div id = "content" >
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< h1 class = "title" > Measurements< / h1 >
< div id = "table-of-contents" >
< h2 > Table of Contents< / h2 >
< div id = "text-table-of-contents" >
< ul >
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< li > < a href = "#org4a44203" > 1. Experimental conditions< / a > < / li >
< li > < a href = "#org91fa62d" > 2. Measurements procedure< / a > < / li >
< li > < a href = "#org015e1bd" > 3. Measurement Channels< / a > < / li >
< li > < a href = "#org807ceb5" > 4. Experiments< / a > < / li >
< li > < a href = "#org3f0d1ab" > 5. Data Analysis< / a >
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< ul >
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< li > < a href = "#org589082c" > 5.1. Loading of the data< / a > < / li >
< li > < a href = "#org48f106f" > 5.2. test< / a > < / li >
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< / ul >
< / li >
< / ul >
< / div >
< / div >
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< div id = "outline-container-org4a44203" class = "outline-2" >
< h2 id = "org4a44203" > < span class = "section-number-2" > 1< / span > Experimental conditions< / h2 >
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< div class = "outline-text-2" id = "text-1" >
< ul class = "org-ul" >
< li > Measurement made in the experiment hutch< / li >
< li > FS=256Hz< / li >
< li > Made by Marc Lesourd on the 12 of October 2018< / li >
< / ul >
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< table border = "2" cellspacing = "0" cellpadding = "6" rules = "groups" frame = "hsides" >
< colgroup >
< col class = "org-left" / >
< col class = "org-left" / >
< / colgroup >
< tbody >
< tr >
< td class = "org-left" > < b > Date< / b > < / td >
< td class = "org-left" > 2018-10-12< / td >
< / tr >
< tr >
< td class = "org-left" > < b > Sensors< / b > < / td >
< td class = "org-left" > Geophones< / td >
< / tr >
< tr >
< td class = "org-left" > < b > Excitation< / b > < / td >
< td class = "org-left" > Instrumented Hammer< / td >
< / tr >
< tr >
< td class = "org-left" > < b > Location< / b > < / td >
< td class = "org-left" > Experimental Hutch< / td >
< / tr >
< / tbody >
< / table >
< p >
< b > Goal< / b > :
< / p >
< ul class = "org-ul" >
< li > The station is now installed on the experimental hutch with a glued granite (final location).< / li >
< li > The station is identified again.< / li >
< / ul >
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< / div >
< / div >
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< div id = "outline-container-org91fa62d" class = "outline-2" >
< h2 id = "org91fa62d" > < span class = "section-number-2" > 2< / span > Measurements procedure< / h2 >
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< div class = "outline-text-2" id = "text-2" >
< p >
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8 < b > Geophone< / b > are used (see table < a href = "#org0f49883" > 3< / a > ):
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< / p >
< ul class = "org-ul" >
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< li > 7 L-28LB geophones (table < a href = "#org42d983e" > 1< / a > )< / li >
< li > 1 L-4C geophone (table < a href = "#orge7d5d0f" > 2< / a > )< / li >
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< / ul >
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< table id = "org42d983e" border = "2" cellspacing = "0" cellpadding = "6" rules = "groups" frame = "hsides" >
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< caption class = "t-above" > < span class = "table-number" > Table 1:< / span > L-28LB Geophone characteristics< / caption >
< colgroup >
< col class = "org-left" / >
< col class = "org-right" / >
< / colgroup >
< tbody >
< tr >
< td class = "org-left" > Natural Frequency [Hz]< / td >
< td class = "org-right" > 4.5< / td >
< / tr >
< tr >
< td class = "org-left" > Weight [g]< / td >
< td class = "org-right" > 140< / td >
< / tr >
< tr >
< td class = "org-left" > Sensitivity [V/(m/s)]< / td >
< td class = "org-right" > 31.3< / td >
< / tr >
< / tbody >
< / table >
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< table id = "orge7d5d0f" border = "2" cellspacing = "0" cellpadding = "6" rules = "groups" frame = "hsides" >
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< caption class = "t-above" > < span class = "table-number" > Table 2:< / span > L-4C Geophone characteristics< / caption >
< colgroup >
< col class = "org-left" / >
< col class = "org-right" / >
< / colgroup >
< tbody >
< tr >
< td class = "org-left" > Natural Frequency [Hz]< / td >
< td class = "org-right" > 1< / td >
< / tr >
< tr >
< td class = "org-left" > Weight [g]< / td >
< td class = "org-right" > 2150< / td >
< / tr >
< tr >
< td class = "org-left" > Sensitivity [V/(m/s)]< / td >
< td class = "org-right" > 276.8< / td >
< / tr >
< / tbody >
< / table >
< p >
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The structure is excited using an < b > instrumented hammer< / b > with impacts on (see table < a href = "#orgb99d784" > 4< / a > ):
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< / p >
< ul class = "org-ul" >
< li > Marble< / li >
< li > Ty< / li >
< li > Hexapod< / li >
< / ul >
< / div >
< / div >
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< div id = "outline-container-org015e1bd" class = "outline-2" >
< h2 id = "org015e1bd" > < span class = "section-number-2" > 3< / span > Measurement Channels< / h2 >
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< div class = "outline-text-2" id = "text-3" >
< p >
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Les fichiers xxx_raw sont sans traitement dans le domaine temporel (environ 10 impacts par fichier)
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< / p >
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< table id = "org0f49883" border = "2" cellspacing = "0" cellpadding = "6" rules = "groups" frame = "hsides" >
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< caption class = "t-above" > < span class = "table-number" > Table 3:< / span > Description of each measurement channel< / caption >
< colgroup >
< col class = "org-right" / >
< col class = "org-left" / >
< col class = "org-left" / >
< col class = "org-left" / >
< / colgroup >
< thead >
< tr >
< th scope = "col" class = "org-right" > Ch. nb< / th >
< th scope = "col" class = "org-left" > Element< / th >
< th scope = "col" class = "org-left" > Location< / th >
< th scope = "col" class = "org-left" > Direction< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td class = "org-right" > 1< / td >
< td class = "org-left" > Geophone L-4C< / td >
< td class = "org-left" > Marble< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 2< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Ty< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 3< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Tilt< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 4< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Hexa< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 5< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Marble< / td >
< td class = "org-left" > H< / td >
< / tr >
< tr >
< td class = "org-right" > 6< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > TY< / td >
< td class = "org-left" > H< / td >
< / tr >
< tr >
< td class = "org-right" > 7< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Tilt< / td >
< td class = "org-left" > H< / td >
< / tr >
< tr >
< td class = "org-right" > 8< / td >
< td class = "org-left" > Geophone L-28LB< / td >
< td class = "org-left" > Hexa< / td >
< td class = "org-left" > H< / td >
< / tr >
< / tbody >
< tbody >
< tr >
< td class = "org-right" > 9< / td >
< td class = "org-left" > Hammer< / td >
< td class = "org-left" > Variable< / td >
< td class = "org-left" > Variable< / td >
< / tr >
< / tbody >
< / table >
< / div >
< / div >
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< div id = "outline-container-org807ceb5" class = "outline-2" >
< h2 id = "org807ceb5" > < span class = "section-number-2" > 4< / span > Experiments< / h2 >
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< div class = "outline-text-2" id = "text-4" >
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< table id = "orgb99d784" border = "2" cellspacing = "0" cellpadding = "6" rules = "groups" frame = "hsides" >
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< caption class = "t-above" > < span class = "table-number" > Table 4:< / span > Description of the location of direction of the excitation for each measurement< / caption >
< colgroup >
< col class = "org-right" / >
< col class = "org-left" / >
< col class = "org-left" / >
< / colgroup >
< thead >
< tr >
< th scope = "col" class = "org-right" > Meas. nb< / th >
< th scope = "col" class = "org-left" > Location< / th >
< th scope = "col" class = "org-left" > Direction< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td class = "org-right" > 1< / td >
< td class = "org-left" > Marble< / td >
< td class = "org-left" > Y< / td >
< / tr >
< tr >
< td class = "org-right" > 2< / td >
< td class = "org-left" > Ty< / td >
< td class = "org-left" > Y< / td >
< / tr >
< tr >
< td class = "org-right" > 3< / td >
< td class = "org-left" > Hexa< / td >
< td class = "org-left" > Y< / td >
< / tr >
< / tbody >
< tbody >
< tr >
< td class = "org-right" > 4< / td >
< td class = "org-left" > Marble< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 5< / td >
< td class = "org-left" > Ty< / td >
< td class = "org-left" > Z< / td >
< / tr >
< tr >
< td class = "org-right" > 6< / td >
< td class = "org-left" > Hexa< / td >
< td class = "org-left" > Z< / td >
< / tr >
< / tbody >
< tbody >
< tr >
< td class = "org-right" > 7< / td >
< td class = "org-left" > Marble< / td >
< td class = "org-left" > X< / td >
< / tr >
< tr >
< td class = "org-right" > 8< / td >
< td class = "org-left" > Ty< / td >
< td class = "org-left" > X< / td >
< / tr >
< tr >
< td class = "org-right" > 9< / td >
< td class = "org-left" > Hexa< / td >
< td class = "org-left" > X< / td >
< / tr >
< / tbody >
< / table >
< / div >
< / div >
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< div id = "outline-container-org3f0d1ab" class = "outline-2" >
< h2 id = "org3f0d1ab" > < span class = "section-number-2" > 5< / span > Data Analysis< / h2 >
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< div class = "outline-text-2" id = "text-5" >
< / div >
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< div id = "outline-container-org589082c" class = "outline-3" >
< h3 id = "org589082c" > < span class = "section-number-3" > 5.1< / span > Loading of the data< / h3 >
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< div class = "outline-text-3" id = "text-5-1" >
< div class = "org-src-container" >
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< pre class = "src src-matlab" > load(< span class = "org-string" > './data/freq_frf.mat'< / span > );
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load(< span class = "org-string" > './data/frf_hexa_x.mat'< / span > );
load(< span class = "org-string" > './data/frf_hexa_y.mat'< / span > );
load(< span class = "org-string" > './data/frf_hexa_z.mat'< / span > );
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load(< span class = "org-string" > './data/frf_marble_x.mat'< / span > );
load(< span class = "org-string" > './data/frf_marble_y.mat'< / span > );
load(< span class = "org-string" > './data/frf_marble_z.mat'< / span > );
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load(< span class = "org-string" > './data/frf_ty_x.mat'< / span > );
load(< span class = "org-string" > './data/frf_ty_y.mat'< / span > );
load(< span class = "org-string" > './data/frf_ty_z.mat'< / span > );
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load(< span class = "org-string" > './data/phs_hexa_x.mat'< / span > );
load(< span class = "org-string" > './data/phs_hexa_y.mat'< / span > );
load(< span class = "org-string" > './data/phs_hexa_z.mat'< / span > );
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load(< span class = "org-string" > './data/phs_marble_x.mat'< / span > );
load(< span class = "org-string" > './data/phs_marble_y.mat'< / span > );
load(< span class = "org-string" > './data/phs_marble_z.mat'< / span > );
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load(< span class = "org-string" > './data/phs_ty_x.mat'< / span > );
load(< span class = "org-string" > './data/phs_ty_y.mat'< / span > );
load(< span class = "org-string" > './data/phs_ty_z.mat'< / span > );
< / pre >
< / div >
< / div >
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< div id = "outline-container-org48f106f" class = "outline-3" >
< h3 id = "org48f106f" > < span class = "section-number-3" > 5.2< / span > test< / h3 >
< div class = "outline-text-3" id = "text-5-2" >
< div class = "org-src-container" >
< pre class = "src src-matlab" > < span class = "org-type" > figure< / span > ;
hold on;
plot(freq_frf, abs(ReIm7(< span class = "org-type" > :< / span > , 5))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Marble'< / span > )
plot(freq_frf, abs(ReIm8(< span class = "org-type" > :< / span > , 6))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Ty'< / span > )
< span class = "org-comment" > % plot(freq_frf, abs(ReIm5(:, 3))./(2*pi*freq_frf), 'DisplayName', 'Tilt')< / span >
plot(freq_frf, abs(ReIm9(< span class = "org-type" > :< / span > , 8))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Hexapod'< / span > )
hold off;
xlim([1, 100]);
< span class = "org-type" > set< / span > (< span class = "org-variable-name" > gca< / span > , < span class = "org-string" > 'xscale'< / span > , < span class = "org-string" > 'log'< / span > ); < span class = "org-type" > set< / span > (< span class = "org-variable-name" > gca< / span > , < span class = "org-string" > 'yscale'< / span > , < span class = "org-string" > 'log'< / span > );
legend(< span class = "org-string" > 'location'< / span > , < span class = "org-string" > 'northwest'< / span > );
< / pre >
< / div >
< div class = "org-src-container" >
< pre class = "src src-matlab" > < span class = "org-type" > figure< / span > ;
hold on;
plot(freq_frf, abs(ReIm5(< span class = "org-type" > :< / span > , 1))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Marble'< / span > )
plot(freq_frf, abs(ReIm5(< span class = "org-type" > :< / span > , 2))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Ty'< / span > )
plot(freq_frf, abs(ReIm5(< span class = "org-type" > :< / span > , 3))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Tilt'< / span > )
plot(freq_frf, abs(ReIm5(< span class = "org-type" > :< / span > , 4))< span class = "org-type" > ./< / span > (2< span class = "org-type" > *< / span > < span class = "org-constant" > pi< / span > < span class = "org-type" > *< / span > freq_frf), < span class = "org-string" > 'DisplayName'< / span > , < span class = "org-string" > 'Hexapod'< / span > )
hold off;
xlim([1, 100]);
< span class = "org-type" > set< / span > (< span class = "org-variable-name" > gca< / span > , < span class = "org-string" > 'xscale'< / span > , < span class = "org-string" > 'log'< / span > ); < span class = "org-type" > set< / span > (< span class = "org-variable-name" > gca< / span > , < span class = "org-string" > 'yscale'< / span > , < span class = "org-string" > 'log'< / span > );
legend(< span class = "org-string" > 'location'< / span > , < span class = "org-string" > 'northwest'< / span > );
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< / pre >
< / div >
< / div >
< / div >
< / div >
< / div >
< div id = "postamble" class = "status" >
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< p class = "author" > Author: Dehaeze Thomas< / p >
2020-11-12 10:30:56 +01:00
< p class = "date" > Created: 2020-11-12 jeu. 10:27< / p >
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< / div >
< / body >
< / html >
