Journal of South China University of Technology Natural Science Edition % Miyahara 6

Transcription

1 Journal of South China University of Technology Natural Science Edition Vol 45 No 8 August X * U doi /j issn X AIS % 2008 Miyahara * NVHSKL Foundation item Supported by the National Natural Science Foundation of China wujun701@ 163 com

2 C-NCAP 10 2 Fig 2 Schematic diagram of pedal impact test kg 10 cm cm m /s cm 2448N 3 1 Fig 1 Pedal fixation methods 3 1 Fig 3 Test results of scheme cm 1312N N 2

3 Fig 4 Test results of scheme mm mm N m * MAT_PIECEWISE_LINEAR_PLASTICITY 6 Fig 6 Comparison of acceleration in different conditions g Table 1 Comparison of the results between simulations and tests /cm /% /% /% Fig 5 Pedal model % 7 7 Fig 7 Comparison of pedal fracture between simulation and test

4 FTSS Hybrid III Hybrid III Fig 8 Restraint system model L Fig 9 9 Comparisons between simulation and test

5 Table 2 Factor-level table / / / N m rad /mm N m Table Simulation results /kn /kn N m F Z Z 3 3 FC Z Z 35 9 kn student-t Table 4 4 P The mean values of tibia force and P values P P X Y TI = M R / M C R + F Z / F C Z M R = M X M Y 槡 1 2 M X X M Y Y M C R

6 8 33 Table 5 5 P Mean values of tibia index and P vaules P AIS and contacts C International Congress & Exposition SAE Paper MIYAHARA R MIYAJIMA Y OGAWa S The Application of Optimization Techniques to Design a Foam Pad to Reduce Lower-Extremity Injuries J American Journal of Tropical Medicine & Hygiene D HARDIN E C SU A VAN den Bogert A J Pre-impact lower extremity posture and brake pedal force predict foot and ankle forces during an automobile collision J Journal of Biomechanical Engineering D J HUANG Cun-junHUANG Shi-lin DU Hui-liang Protection of occupant lower extremities during vehicle fron- tal impact J Journal of Tsinghua University Science 3 and Technology C-NCAP 2015 C-NCAP 2015 S 12 D 1 D 2012 D D 2008 D MORGAN R M EPPINGER R H HENNESSEY B C Ankle joint injury mechanism for adults in frontal automotive impact C Stapp Car Crash Conference 35th San Diego California s n PENG Qian YANG Ji-kuang The research on injury prevention of drive lower extremity in the car frontal offset impacts C Infats Proceedings of the 5th International Forum of Automotive Traffic Safety S l s n HUELKE D F COMPTON T W COMPTON C P Lower extremity injuries in frontal crashes injuries locations D 2016

7 34 45 Effect of Accelerator Pedal on Driver's Lower Extremity Injury WU Jun 1 LIU Yu-hao 2 YAO Yuan 3 CAO Li-bo 1 1 State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha HunanChina 2 China Automotive Technology and Research CenterTianjin China 3 State Key Laboratory of Vehicle NVH and Safety TechnologyChongqing China Abstract In frontal crashesthe accelerator pedal has a direct impact on the driver's feetand its mechanical property is one of the main factors affecting the driver's lower extremity injury However in the current simulation researches on the driver's lower extremity injury the accelerator pedal is often ignored or simulated by using the rigid body modelwhich cannot accurately reflect the effect of the pedal on the driver's lower extremity and cannot be used to analyze the effect of the pedal fracture on the driver's lower extremity injury In order to solve these problemsa detailed finite element model of the accelerator pedal is constructedand it is proved to be effective through six groups of pedal component tests Based on this model the effects of the pedal friction coefficientthe rotation stiffness the travel and the intrusion volumethe fracture torque on the driver's lower extremity injury are revealed The results show that the fracture torque of the pedal has a significant effect on the lower extremity injury Specifically reducing the fracture torque can greatly decrease the driver's tibia force and tibia index thus reducing the risk of the lower extremity injury This research result also highlights the value of the breakable pedal designing on the driver's lower extremity protectionand can be taken as a reference for the structure design of accelerator pedals Key words frontal crash accelerators lower extremity injury 檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾 % 37 1% PCT % 2015 PCT % 54 3% % 19 0% 2017 檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾