Abstract: European project SENIORS proposed a novel pedestrian lower limb model FlexPLIUBM, and JARI and JAMA in Japan proposed model aPLI. These two models show better biomechanical responses, including motion and force responses.A series of basic analyses are conducted on the currently used model FlexPLI and the above-mentioned two models, which may be applied in the future, in this paper. Firstly, some key parameters, including total mass, segment mass, position of mass center, structure, stiffness and dimension of lower limb models FlexPLI, FlexPLIUBM and aPLI are analyzed and compared. Then based on these key parameters, kinematics and mechanics analyses on crash process are carried out with the rules of and differences between evaluation indicators obtained. Finally, tests are performed to verify analyzed conclusions.All the comparative analyses and conclusions on pedestrian lower limb models FlexPLI, FlexPLIUBM and aPLI can provide guidance for the development of vehicle front bumper.

Key words: pedestrian lower limb model, FlexPLI, FlexPLIUBM, aPLI