不同加载工况对腰椎响应指标影响研究  

Study on the influence of different loading conditions on lumbar response index

作　　者：芮向前 崔书瑞 石霄鹏 RUI Xianqian;CU Shurui;SHI Xiaopeng(Jiatai Aircraft Equipment Co.,Ltd.,Xiangyang 441046,Hubei,China;Colege of Safety Science and Engineering,CAUC,Tianjin,300300,China;Innovation Research Institute of Science and Technology,CAUC,Tianjin,300300,China)

机构地区：[1]湖北航宇嘉泰飞机设备有限公司,湖北襄阳441046 [2]中国民航大学安全科学与工程学院,天津300300 [3]中国民航大学科技创新研究院,天津300300

出　　处：《中国民航大学学报》2025年第1期20-26,共7页Journal of Civil Aviation University of China

基　　金：天津市教委科研计划项目(2022KJ070)。

摘　　要：腰椎载荷和动态响应指数(DRI,dynamic response index)是评估飞机应急着陆过程中乘员腰椎损伤的两种常见腰椎响应指标。为明确这两种指标的差异,首先,本文建立了座椅-乘员有限元模型和乘员上肢集中参数模型;其次,对座椅-乘员有限元模型和乘员上肢集中参数模型进行对比验证;最后,通过改变加载时间和加载峰值对这两种腰椎响应指标进行变参分析。计算结果表明,采用地板加速度计算的DRI值较采用骨盆加速度计算的DRI值更低,且当加载时间一定时,随着加载峰值的增加,DRI值呈增长趋势;当加载峰值一定时,随着加载时间的增加,DRI值呈先增加后减小趋势;当速度变化量一定时,随着加载峰值的增加,DRI值呈增长趋势。综上,通过梳理和分析DRI的作用原理,有助于促进乘员腰椎损伤判定标准的持续完善。Lumbar load and dynamic response index(DRI)are two common lumbar response index used to assess passenger lumbar injuries during emergency landing of aircrat.To elucidate the dfferences between these two metrics,firstly,the seat-occupant finite element model and the occupant upper limb lumped parameter model were established in this paper.Secondly,a comparative verification is conducted between the seat-occupant finite element model and the occupant upper limb lumped parameter model.Finally,a parametric analysis was conducted on these two lum-bar response index by changing the loading time and loading peak value.The results show that the DRI value cal-culated by floor acceleration is lower than that calculated by pelvic acceleration,and when the loading time is con-stant,the DRI value shows an increasing trend with the increase of loading peak value.When the loading peak val-ue is constant,the DRI value shows the trend of increasing first and then decreasing with the increase of loading time.When the speed change is constant,the DRI value shows an increasing trend with the increase of the loading peak value.In summary,by sorting out and analyzing the principle of DRI,it is helpful to promote the continuous improvement of the criteria for determining occupant lumbar injuries.

关 键 词：动态响应指数(DRI) 集中参数模型 腰椎损伤 

分 类 号：V223.2[航空宇航科学与技术—飞行器设计]