Akademik Veri Yönetim Sistemi
Transport Means, Kaunas, Litvanya, 2 - 04 Ekim 2024, ss.270-275
Mean acceleration, delta-V and peak acceleration are the typical parameters used to describe crash pulse characteristics. This study investigates the relationship between upper neck loading and crash pulse characteristics in rear impacts. For this investigation, a seat-occupant model is subjected to 27 crash pulses with delta-V ranging from 9 km/h to 24 km/h. The shear force, bending moment and tension force at the joint between the skull and the first cervical vertebra are recorded to evaluate upper neck loading. Least-squares regression analyses indicate that peak moving average acceleration with a time window of 50 ms is highly influential in upper neck loading. Although crash pulses with the same delta-V can have different shapes and average accelerations, it is observed that delta-V is also an undeniable factor in expressing crash pulse severity. Peak acceleration of the crash pulse does not correlate well with upper neck loading. Linear and exponential regression models combining the effects of both moving average acceleration and delta-V are constructed to predict upper neck loading. It is shown that exponential models produce high correlation of upper neck loading with a coefficient of determination reaching as high as 0.89.