Name: simulation of human-induced vibrations based on the characterized in-field pedestrian behavior
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Forsøgene involverer walking individer udføres i samarbejde med Movement &amp; kropsholdning Analyse Laboratory Leuven (MALL) 25. Deres samarbejde og støtte er taknemmeligt anerkendt.

Alle procedurer blev godkendt af den etiske komité af universitetshospitalet i KU Leuven og hvert fag gav et skriftligt informeret samtykke forud for deltagelse. 1. 3D Motion Tracking: Konfiguration og datafangst <ol><li> Sørg for, at de enkelte sensorer er fuldt opladet (figur 1A). Dette trin tager omkring 1 time, men kan udføres på de dage forud for den faktiske målinger. Følg producentens opladning protokol. </li><li> MT manager - Data erhvervelse 2: <o...

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Sound Vib. 330 (6), 1265-1284 (2011).</li><li>Racic, V., Brownjohn, J. M. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mathematical+modelling+of+random+narrow+band+lateral+excitation+of+footbridges+due+to+pedestrians+walking.">Mathematical modelling of random narrow band lateral excitation of footbridges due to pedestrians walking.</a> Comput. Struct. 90-91 (1), 116-130 (2012).</li><li>Reynders, E., Roeck, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=De+Reference-based+combined+deterministic-stochastic+subspace+identification+for+experimental+and+operational+modal+analysis.">De Reference-based combined deterministic-stochastic subspace identification for experimental and operational modal analysis.</a> Mech. Syst. Signal Process. 22 (3), 617-637 (2008).</li><li>Bocian, M., Macdonald, J. H. G., Burn, J. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biomechanically+inspired+modeling+of+pedestrian-induced+vertical+self-excited+forces.">Biomechanically inspired modeling of pedestrian-induced vertical self-excited forces.</a> J. Bridg. Eng. 18 (12), 1336-1346 (2013).</li><li>&#381;ivanovi&#263;, S., Pavi&#263;, A., Ing&#242;lfsson, E. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modeling+spatially+unrestricted+pedestrian+traffic+on+footbridges.">Modeling spatially unrestricted pedestrian traffic on footbridges.</a> Journal of Structural Engineering. 136 (10), 1296-1308 (2010).</li><li>Agu, E., Kasperski, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Influence+of+the+random+dynamic+parameters+of+the+human+body+on+the+dynamic+characteristics+of+the+coupled+system+of+structurecrowd.">Influence of the random dynamic parameters of the human body on the dynamic characteristics of the coupled system of structurecrowd.</a> J. 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Biomech. 47 (11), 2693-2699 (2014).</li><li>Liedtke, C., Fokkenrood, S. A., Menger, J. T., van der Kooij, H., Veltink, P. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evaluation+of+instrumented+shoes+for+ambulatory+assessment+of+ground+reaction+forces.">Evaluation of instrumented shoes for ambulatory assessment of ground reaction forces.</a> Gait Posture. 26 (1), 39-47 (2007).</li><li>Boutaayamou, M., Schwartz, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Validated+extraction+of+gait+events+from+3D+accelerometer+recordings.">Validated extraction of gait events from 3D accelerometer recordings.</a> , 6-9 (2012).</li><li>Kavanagh, J. J., Menz, H. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accelerometry:+A+technique+for+quantifying+movement+patterns+during+walking.">Accelerometry: A technique for quantifying movement patterns during walking.</a> Gait Posture. 28 (1), 1-15 (2008).</li><li>. MALL: Movement and posture Analysis Laboratory Leuven (Interdepartemental research laboratory at the Faculty of Kinisiology and Rehabilitation Sciences) Available from: <a target="_blank" href="https://faber.kuleuven.be/MALL/mall.php">https://faber.kuleuven.be/MALL/mall.php</a> (2015)</li></ol>

Den menneskelige bevægelse og deraf GRF identificeres sædvanligvis ved anvendelse af kraft plader, instrumenteret løbebånd samt optisk motion capture teknologi såsom Vicon 18 og CODA 19. Anvendelsen af ​​disse teknikker er dog begrænset til laboratoriemiljø. Som svar på denne ulempe, er potentialet i innovative teknikker, der tillader måling af &quot;naturlige&quot; person, opførsel over mange gentagne og uafbrudt cyklusser i øjeblikket undersøgt 20. Alternative teknikker...

Drevet af den økonomiske efterspørgsel af effektivitet og den stigende styrke (nye) materialer, arkitekter og ingeniører at flytte grænserne for at bygge stadigt længere, højere og lettere strukturer. Typisk, lys og slanke konstruktioner har en eller flere fysiske frekvenser, der ligger inden for den dominerende spektrum af fælles menneskelige aktiviteter såsom gåture, løb eller hoppe. Forventes at være omfattet (nær-) resonant excitation, er de ofte urimeligt lydhøre over for menneskelig bevægelse, hvilket resulterer i forstyrrende eller endog skadelige 1 vibrationer. For disse slanke og lette konstruktioner, vibrationer servicevenlighed er et spørgsmål om stigende bekymring, der ofte udgør den kritiske design krav. Det menneskelige bevægelse og de resulterende jorden reaktionskræfter (GRF) er normalt identificeres eksperimentelt under laboratorieforhold. I øjeblikket er designerne tvunget til at stole på - hvad der antages at være &quot;konservativ&quot; - svarende lOAD modeller opskaleret fra enkelt-personers kraftmålinger. Med designs undergivet den dynamiske ydeevne under høje crowd tætheder, eksisterer en stærk efterspørgsel efter kontrol og forfinelse af de aktuelt tilgængelige belastningsmodeller. Den nuværende protokol anvender en 3D inerti bevægelsessporing teknik til karakterisering af den naturlige bevægelse af fodgængere. Det er vist, hvordan denne information kan anvendes til at definere korrelationen mellem fodgængere samt de tilsvarende inducerede belastninger. I et efterfølgende trin bringes kendetegnet fodgænger adfærd anvendes til numerisk simulere inducerede strukturelle svar. Sammenligning med den registrerede strukturens reaktion gør det muligt at kvantificere virkningen af afregnet human-struktur interaktion fænomener, fx det tilsatte dæmpning på grund af tilstedeværelsen af fodgængerne. Metoden er illustreret for fuldskala forsøg på en rigtig gangbro, hvor den strukturelle respons og bevægelsen af ​​partagerne registreres samtidigt.

<table border="0" cellpadding="0" cellspacing="0" width="1081">
	<tbody>
		<tr height="65">
			<td height="65" style="height:65px;width:301px;">MTw Development Kit + MT Manager Software</td>
			<td style="width:107px;">Xsens</td>
			<td style="width:280px;">MTW-38A70G20-1</td>
			<td style="width:393px;">Development kit with wireless, highly accurate, small and lightweight 3D human motion trackers and accompanying click-in full body straps.</td>
		</tr>
		<tr height="65">
			<td height="65" style="height:65px;width:301px;">True Impulse Kinetic Measurement System + NDI Open Capture Data Acquisition and Visualization System</td>
			<td style="width:107px;">NDI Northern Digital Inc.</td>
			<td style="width:280px;">791028</td>
			<td style="width:393px;">TrueImpulse measures reaction forces exerted by humans during a wide variety of activities.</td>
		</tr>
		<tr height="65">
			<td height="65" style="height:65px;width:301px;">GMS-24</td>
			<td style="width:107px;">GeoSIG Ltd</td>
			<td style="width:280px;">Rev. 03.08.2010</td>
			<td style="width:393px;">(Wireless) accelerometers to register the structural vibrations.</td>
		</tr>
		<tr height="65">
			<td height="65" style="height:65px;width:301px;">GeoDAS GeoSIG Data Acquisition System</td>
			<td style="width:107px;">GeoSIG Ltd</td>
			<td style="width:280px;">Rev. 03.08.2010</td>
			<td style="width:393px;">Graphical MS Windows application running under Windows 9x/NT/2000, providing a software interface between users and GeoSIG recorders GSR/GCR/GBV/GT.</td>
		</tr>
		<tr height="65">
			<td height="65" style="height:65px;width:301px;">PediVib toolbox</td>
			<td style="width:107px;">KU Leuven</td>
			<td style="width:280px;">/</td>
			<td style="width:393px;">Software interface/toolbox to simulate the structural vibrations induced by pedestrians.</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:301px;">Metronome</td>
			<td style="width:107px;">/</td>
			<td style="width:280px;">/</td>
			<td style="width:393px;">A device to indicate the targetted pacing rate of the activity (free applications are available online for pc/laptop/smartphone).</td>
		</tr>
	</tbody>
</table>

simulation of human-induced vibrations based on the characterized in-field pedestrian behavior

For slank og lette konstruktioner, vibrationer servicevenlighed er et spørgsmål om stigende bekymring, der ofte udgør den kritiske design krav. Med designs underlagt den dynamiske ydeevne under menneskeskabte belastninger, eksisterer en stærk efterspørgsel efter kontrol og forfinelse af tiden tilgængelige belastningsmodeller. Det nuværende bidrag bruger en 3D inerti bevægelsessporing teknik til karakterisering af i marken fodgænger adfærd. Teknikken er først testet i laboratorieforsøg med samtidig registrering af de tilsvarende formalet reaktionskræfter. Forsøgene omfatter walking personer samt rytmiske menneskelige aktiviteter såsom hoppe og vugger. Det er vist, at den registrerede bevægelse muliggør identifikation af den tid variant stimuleringsfrekvensen af ​​aktiviteten. Sammen med vægten af ​​den person, og anvendelsen af ​​de generelle kraft modeller til rådighed i litteraturen, de identificerede tid-variant pacing procentsats giver til characterize de menneskeskabte belastninger. Desuden tidssynkronisering blandt de trådløse motion trackers tillader identifikation synkroniseringen blandt deltagerne. Efterfølgende teknik, der anvendes på en rigtig gangbro, hvor både bevægelsen af ​​personer og de inducerede strukturelle vibrationer registreres. Det er vist, hvordan kendetegnet ved-felt gående adfærd kan anvendes til at simulere den inducerede strukturelle svar. Det er påvist, at den in situ identificeret pacing sats og synkronisering rate udgør et væsentligt input til simulering og verifikation af de menneskeskabte belastninger. De vigtigste potentielle anvendelser af den foreslåede metode er estimeringen af ​​menneske-struktur interaktion fænomener og udvikling af egnede modeller for sammenhængen mellem fodgængere i reelle trafikforhold.

Det første er det vist, hvordan de accelerationer, der er registreret i nærheden af ​​CoM af de personer kan bruges til at karakterisere de deraf følgende GRF. Resultaterne diskuteres her for en walking individ 3. Fuldt sammenlignelige observationer foretages, når rytmiske menneskelige aktiviteter, dvs., spring og vugger, betragtes. Figur 7A og 7B viser, at amplituden spektrum af de kontinuerlige vertikale fod kræfter og de ?...

Watch this Scientific Journal Video about Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior at JoVE.com

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

En protokol præsenteres til karakterisering af den i marken fodgænger adfærd og simuleringen af ​​den resulterende strukturelle svar. Field-test viser, at in situ identificeret pacing sats og synkronisering blandt deltagerne udgør et væsentligt input til simulering og verifikation af de menneskeskabte belastninger.

Simulering af Menneske-induceret Vibrations Baseret på Karakteriseret In-field Fodgænger Behavior

For slender and lightweight structures, vibration serviceability is a matter of growing concern, often constituting the critical design requirement. With ...

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