首页|Influence of muscle activation on lumbar injury under a specific+Gz load
Influence of muscle activation on lumbar injury under a specific+Gz load
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Purpose:The present study aimed to analyze the influence of muscle activation on lumbar injury under a specific+Gz load.Methods:A hybrid finite element human body model with detailed lumbar anatomy and lumbar muscle activation capabilities was developed.Using the specific+Gz loading acceleration as input,the kinematic and biomechanical responses of the occupant's lower back were studied for both activated and deacti-vated states of the lumbar muscles.Results:The results indicated that activating the major lumbar muscles enhanced the stability of the occupant's torso,which delayed the contact between the occupant's head and the headrest.Lumbar muscle activation led to higher strain and stress output in the lumbar spine under+Gz load,such as the maximum Von Mises stress of the vertebrae and intervertebral discs increased by 177.9％and 161.8％,respectively,and the damage response index increased by 84.5％.Conclusion:In both simulations,the occupant's risk of lumbar injury does not exceed 10％probability.Therefore,the activation of muscles could provide good protection for maintaining the lumbar spine and reduce the effect of acceleration in vehicle travel direction.
Lumbar musclesFinite element analysisBiomechanics+Gz loadInjury mechanisms
Kang Lei、Chen-Zhu Zhao、Fan Li、Shu-Lin Liu、Peng Yang
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State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410082,China
Naval Medical Center,The Secondary Military Medical University,Shanghai,200433,China
Department of Orthopedics,Naval Medical Center of PLA,Shanghai,200433,China
National Natural Science FoundationPLA Naval Medical Center
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NSTL
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