Modal analysis of the human neck in vivo as a criterion for crash test dummy evaluation
Identifieur interne : 001803 ( Main/Exploration ); précédent : 001802; suivant : 001804Modal analysis of the human neck in vivo as a criterion for crash test dummy evaluation
Auteurs : R. Willinger [France] ; N. Bourdet [France] ; R. Fischer [France] ; F. Le Gall [France]Source :
- Journal of sound and vibration [ 0022-460X ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme, Automobile.
English descriptors
- KwdEn :
Abstract
Low speed rear impact remains an acute automative safety problem because of a lack of knowledge of the mechanical behaviour of the human neck early after impact. Poorly validated mathematical models of the human neck or crash test dummy necks make it difficult to optimize automotive seats and head rests. In this study we have constructed an experimental and theoretical modal analysis of the human head-neck system in the sagittal plane. The method has allowed us to identify the mechanical properties of the neck and to validate a mathematical model in the frequency domain. The extracted modal characteristics consist of a first natural frequency at 1.3±0.1 Hz associated with head flexion-extension motion and a second mode at 8±0.7 Hz associated with antero-posterior translation of the head, also called retraction motion. Based on this new validation parameters we have been able to compare the human and crash test dummy frequency response functions and to evaluate their biofidelity. Three head-neck systems of current test dummies dedicated for use in rear-end car crash accident investigations have been evaluated in the frequency domain. We did not consider any to be acceptable, either because of excessive rigidity of their flexion-extension mode or because they poorly reproduce the head translation mode. In addition to dummy evaluation, this study provides new insight into injury mechanisms when a given natural frequency can be linked to a specific neck deformation.
Affiliations:
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Le document en format XML
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Willinger</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>UMR 7507 ULP-CNRS, University of Strasbourg, 2 rue Boussingault</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName></affiliation></author><author><name sortKey="Bourdet, N" sort="Bourdet, N" uniqKey="Bourdet N" first="N." last="Bourdet">N. Bourdet</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>UMR 7507 ULP-CNRS, University of Strasbourg, 2 rue Boussingault</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName></affiliation></author><author><name sortKey="Fischer, R" sort="Fischer, R" uniqKey="Fischer R" first="R." last="Fischer">R. Fischer</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>UMR 7507 ULP-CNRS, University of Strasbourg, 2 rue Boussingault</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName></affiliation></author><author><name sortKey="Le Gall, F" sort="Le Gall, F" uniqKey="Le Gall F" first="F." last="Le Gall">F. Le Gall</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>CERA-TREVES, rue Emile Arques</s1><s2>51000 Reims</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Champagne-Ardenne</region><settlement type="city">Reims</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of sound and vibration</title><title level="j" type="abbreviated">J. sound vib.</title><idno type="ISSN">0022-460X</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of sound and vibration</title><title level="j" type="abbreviated">J. sound vib.</title><idno type="ISSN">0022-460X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biomechanics</term><term>Crush</term><term>Dummy</term><term>Experimental study</term><term>Frequency domain method</term><term>Head</term><term>Human</term><term>Low speed</term><term>Mechanical properties</term><term>Mechanical shock</term><term>Modal analysis</term><term>Modeling</term><term>Motor car</term><term>Natural frequency</term><term>Neck</term><term>Response function</term><term>Safety</term><term>Seat</term><term>Traffic accident</term><term>Vibration</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Ecrasement</term><term>Sécurité</term><term>Biomécanique</term><term>Choc mécanique</term><term>Fréquence propre</term><term>Vibration</term><term>Homme</term><term>Cou</term><term>Mannequin</term><term>Basse vitesse</term><term>Accident circulation</term><term>Automobile</term><term>Siège</term><term>Tête</term><term>Analyse modale</term><term>Modélisation</term><term>Méthode domaine fréquence</term><term>Fonction réponse</term><term>Etude expérimentale</term><term>Propriété mécanique</term><term>.</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term><term>Automobile</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Low speed rear impact remains an acute automative safety problem because of a lack of knowledge of the mechanical behaviour of the human neck early after impact. Poorly validated mathematical models of the human neck or crash test dummy necks make it difficult to optimize automotive seats and head rests. In this study we have constructed an experimental and theoretical modal analysis of the human head-neck system in the sagittal plane. The method has allowed us to identify the mechanical properties of the neck and to validate a mathematical model in the frequency domain. The extracted modal characteristics consist of a first natural frequency at 1.3±0.1 Hz associated with head flexion-extension motion and a second mode at 8±0.7 Hz associated with antero-posterior translation of the head, also called retraction motion. Based on this new validation parameters we have been able to compare the human and crash test dummy frequency response functions and to evaluate their biofidelity. Three head-neck systems of current test dummies dedicated for use in rear-end car crash accident investigations have been evaluated in the frequency domain. We did not consider any to be acceptable, either because of excessive rigidity of their flexion-extension mode or because they poorly reproduce the head translation mode. In addition to dummy evaluation, this study provides new insight into injury mechanisms when a given natural frequency can be linked to a specific neck deformation.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Alsace (région administrative)</li><li>Champagne-Ardenne</li><li>Grand Est</li></region><settlement><li>Reims</li><li>Strasbourg</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Willinger, R" sort="Willinger, R" uniqKey="Willinger R" first="R." last="Willinger">R. Willinger</name></region><name sortKey="Bourdet, N" sort="Bourdet, N" uniqKey="Bourdet N" first="N." last="Bourdet">N. Bourdet</name><name sortKey="Fischer, R" sort="Fischer, R" uniqKey="Fischer R" first="R." last="Fischer">R. Fischer</name><name sortKey="Le Gall, F" sort="Le Gall, F" uniqKey="Le Gall F" first="F." last="Le Gall">F. Le Gall</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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