Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture

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dc.contributor.supervisor Telichev, Igor (Mechanical Engineering) en_US
dc.contributor.author Kuznetcov, Anton
dc.date.accessioned 2018-02-06T22:15:13Z
dc.date.available 2018-02-06T22:15:13Z
dc.date.issued 2017 en_US
dc.identifier.citation Kuznetcov, A., Telichev, I., Wu, C., Q., 2017. Numerical parametric study on factors affecting passenger safety in motorcoach frontal collision. International Journal of Crashworthiness, 22(2), pp. 214-226 en_US
dc.identifier.uri http://hdl.handle.net/1993/32883
dc.description.abstract National authorities constantly work on enhancing the crash safety regulations for motorcoaches in North America, promoting further research on the factors affecting passenger safety in severe collisions. The thesis presents the results of a comprehensive study on the effect of the acceleration load experienced by a coach passenger compartment during a frontal collision on passenger safety. As a large variation in seating posture is found among the coach passengers and owing to its high influence on passenger kinematics during a crash, a special methodology is developed to account for posture uncertainty. The study on the influence of the pulse shape on the occupant’s injury criteria is performed numerically using a validated model of the motorcoach sled test equipped with two belted and two unbelted Anthropomorphic Test Devices. The results indicate that the probability of an injury for unbelted occupants seating in a comfortable posture can be significantly increased compared to the standard posture specified in the regulations, with up to 113% increase in Head Injury Criterion and a 97% increase in Femur Loads. For the parametric pulse shape variations under the uncertainty of seating posture, the dependence of most of the injury criteria values on pulse shape is found to be insignificant on the scale of the values’ deviations due to stochastic posture alternations. Overall, the obtained results emphasize the importance of accounting for posture variations in both regulation testing and numerical parametric studies. It is suggested that a parametric study can be carried out independently from a posture variation analysis, enabling considerable computational time savings while still accounting for the dispersion of the results. For regulation testing, a preparatory numerical posture variation study is recommended before the physical test to identify dangerous seating postures for a given impact scenario and to ensure the worst-case scenario is reproduced. The proposed methodology provides the basis for the development of a contemporary approach to the problems of the occupant protection under real-world conditions relying on probabilistic rather than traditional deterministic design philosophy. en_US
dc.publisher Taylor and Francis en_US
dc.subject Motorcoach en_US
dc.subject Frontal Collision en_US
dc.subject Passenger safety en_US
dc.subject Posture en_US
dc.subject Injury criteria en_US
dc.subject Sled test en_US
dc.title Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture en_US
dc.degree.discipline Mechanical Engineering en_US
dc.contributor.examiningcommittee Luo, Yunhua (Mechanical Engineering) Shalaby, Ahmed (Civil Engineering) Untaroiu, Costin (Biomedical Engineering and Mechanics, Virginia Tech, Wake Forest University) en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US
dc.description.note May 2018 en_US

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