A study on biodynamic models of seated human subjects exposed to vertical vibration

Liang, Cho–Chung; Chiang, Chi-Feng

doi:10.1016/j.ergon.2006.06.008

Cited by 171 publications

(107 citation statements)

References 34 publications

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“…These biodynamic responses allow for the understanding of physical responses of the seated body to WBV and serve to formulate more reliable biodynamic models 3,4) . The apparent mass has the advantage that it can be obtained directly from the measured acceleration and force at the driving-point and allows for necessary corrections to account for the inertia force due to the seat structure in a convenient manner 29) .…”

Section: Discussionmentioning

confidence: 99%

“…Earlier measurements on the force-motion biodynamic response (impedance, apparent mass) at the body-seat interface and vibration transmissibility (seat to head) have led to the development of different mechanical-equivalent models 3,4) . Such models could simulate the overall passive biodynamic responses under various vibration and postural conditions and as such serve as an important tool in vehicle seat design.…”

Section: Introductionmentioning

confidence: 99%

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Biodynamic Response and Spinal Load Estimation of Seated Body in Vibration Using Finite Element Modeling

Wang

Bazrgari²,

Shirazi‐Adl

et al. 2010

Ind Health

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Trunk biomechanical models play an indispensable role in predicting muscle forces and spinal loads under whole-body vibration (WBV) exposures. Earlier measurements on the force-motion biodynamic response (impedance, apparent mass) at the body-seat interface and vibration transmissibility (seat to head) have led to the development of different mechanical models. Such models could simulate the overall passive response and serve as an important tool for vehicle seat design. They cannot, however, evaluate physiological parameters of interest under the WBV. On the contrary, anatomical models simulating human's physiological characteristics can predict activities in muscles and their dynamic effects on the spine. In this study, a kinematics-driven nonlinear finite element model of the spine, in which the kinematics data are prescribed, is used to analyse the trunk response in seated WBV. Predictions of the active model (i.e., with varying muscle forces) as compared with the passive model (i.e., with no muscle forces) compared satisfactorily with measurements on vertical apparent mass and seat-to-head transmissibility biodynamic responses. Results demonstrated the crucial role of muscle forces in the dynamic response of the trunk. Muscle forces, while maintaining trunk equilibrium, substantially increased the compression and shear forces on the spine and, hence, the risk of tissue injury.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodynamic Response and Spinal Load Estimation of Seated Body in Vibration Using Finite Element Modeling

Wang

Bazrgari²,

Shirazi‐Adl

et al. 2010

Ind Health

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show abstract

“…In 1998, Griffin et al used electro-hydraulic servo vibration table to test the contact force and displacement between the human body and the table of standing posture and sitting posture random vibration excitation, then obtained the basic frequency and damping ratio of the 60 tested human body [9]. In 2006, Liang et al analyzed and compared the different degrees of freedom model based on the experimental data of vertical vibration of European and American sitting posture [10]. In 2011, Gao et al obtained the basic parameters of human vibration based on sitting posture of few Chinese people [11].…”

Section: The Influence Of Crowd Load On Structural Dynamic Characterimentioning

confidence: 99%

Study on Human-structure Dynamic Interaction in Civil Engineering

Gao

Cao

2018

E3S Web Conf.

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Abstract:The research of human-structure dynamic interaction are reviewed. Firstly, the influence of the crowd load on structural dynamic characteristics is introduced and the advantages and disadvantages of different crowd load models are analyzed. Then, discussing the influence of structural vibration on the human-induced load, especially the influence of different stiffness structures on the crowd load. Finally, questions about human-structure interaction that require further study are presented.

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“…It has been pointed out that vibrations with a frequency lower than 2 Hz can induce minor and temporary effects like carsickness that, producing remarkable discomfort, interfere with the desired working performance while long-term exposure to vibrations ranging from 2 to 20 Hz can cause severe diseases such as spinal column degenerative pathologies [8][9][10]. Such harmful vibrations, was weak.…”

Section: Introductionmentioning

confidence: 99%

Whole-Body Vibration in Farming: Background Document for Creating a Simplified Procedure to Determine Agricultural Tractor Vibration Comfort

Cutini¹,

Brambilla²,

Bisaglia³

2017

Agriculture

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Operator exposure to high levels of whole-body vibration (WBV) presents risks to health and safety and it is reported to worsen or even cause back injuries. Work activities resulting in operator exposure to whole-body vibration have a common onset in off-road work such as farming. Despite the wide variability of agricultural surface profiles, studies have shown that with changing soil profile and tractor speed, the accelerations resulting from ground input present similar spectral trends. While on the one hand such studies confirmed that tractor WBV emission levels are very dependent upon the nature of the operation performed, on the other, irrespective of the wide range of conditions characterizing agricultural operations, they led researchers to set up a possible and realistic simplification and standardization of tractor driver comfort testing activities. The studies presented herewith indicate the usefulness, and the possibility, of developing simplified procedures to determine agricultural tractor vibration comfort. The results obtained could be used effectively to compare tractors of the same category or a given tractor when equipped with different seats, suspension, tyres, etc.

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A study on biodynamic models of seated human subjects exposed to vertical vibration

Cited by 171 publications

References 34 publications

Biodynamic Response and Spinal Load Estimation of Seated Body in Vibration Using Finite Element Modeling

Biodynamic Response and Spinal Load Estimation of Seated Body in Vibration Using Finite Element Modeling

Study on Human-structure Dynamic Interaction in Civil Engineering

Whole-Body Vibration in Farming: Background Document for Creating a Simplified Procedure to Determine Agricultural Tractor Vibration Comfort

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