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Soil Trip Rollover Simulation and Occupant Kinematics in Real-World Accident

机译:土壤跳闸滚动仿真与现实世界意外的乘员运动学

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With SUVs and minivans accounting for a larger share of the US market in the past decade, rollover accidents have drawn greater attention, leading to more active research from different perspectives. This ranges from investigations for elucidating the basic causes and mechanisms of rollover accidents to studies of more advanced occupant protection measures. As the phenomenon of a rollover accident is longer in duration than frontal, side or rear impacts, it is relatively difficult to simulate such accidents for experimental verification and also for proper evaluation of occupant restraint system performance. In this work, we focused on the trip-over type, which occurs most frequently, and performed simulations to reproduce real-world rollover accidents by combining PC-Crash and FEA. Soil trip-over simulation was carried out based on real-world accidents. Based on rigid body dynamics, PC-Crash software was chosen to make an accident reconstruction analysis of some selected cases chosen from an accident database (NASS-CDS). Through a process of iteration the overall kinematics of the vehicle movement before and after the crash was captured. The output of this PC-crash simulation was then used as the initial input conditions (i.e., speed, deceleration, etc.) of a detailed finite element analysis. This analysis can simulate more accurately the kinematics of the vehicle and also simultaneously visualize the occupant dynamics starting from the sliding or furrowing (lateral deceleration) phase, through the intermediate tripping and rolling phase to the final contact phase with the ground in a soil trip-over accident. The combination of these two efficient tools helps to reveal the most important parameters in experimental verification for simulating real-world accidents more realistically. Further, occupant kinematics were studied and compared using Hybrid-III dummy and human digital model in soil trip-over mode rollover accident.
机译:随着SUV和小型货车占美国市场在过去十年中的较大份额,翻车事故已经倍受关注,导致从不同的角度更积极的研究。这包括从调查阐明的基本原因和翻车事故,以更先进的乘员保护措施的研究机制。由于翻车事故的现象在持续时间上比正面,侧面或后部碰撞更长的时间,这是比较难以模拟此类事故对实验验证和也为乘员约束系统性能恰当的评价。在这项工作中,我们将重点就行头型,其中出现频率最高,并进行了模拟相结合PC死机和FEA重现真实世界的翻车事故。土壤跳闸了仿真是基于现实世界的事故进行。基于刚体动力学,选择PC-崩溃软件制作的,从事故数据库(NASS-CDS)选择了一些选择的情况下,事故重建分析。通过反复的车辆运动的整体运动之前和之后的过程飞机失事已被抓获。然后这个PC-碰撞模拟的输出被用作了详细的有限元分析的初始输入条件(即,速度,减速度等)。这种分析可以模拟所述车辆的更准确的运动学和也同时可视化从滑动或开沟(横向减速)相开始,通过中间跳闸并在土壤TRIP-与地面滚动阶段到最终接触阶段乘员动力学过事故。这两个有效的工具相结合,有助于揭示在实验验证中最重要的参数,更真实地模拟现实世界的事故。此外,研究乘员运动学和使用混合-III假人在土壤行程转移模式侧翻事故人体数字模型进行比较。

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