Design of motorcycle rider protection systems using numerical techniques

The goal of this paper is the development of a design methodology, based on the use of finite elements numerical tools and dummies in order to study the damages and injuries that appear during a motorcyclist collision against a motorcyclist protection system (MPS). According to the existing regulation, a Hybrid III dummy FEM model has been used as a starting point and some modifications have been included. For instance a new finite element helmet model has been developed and later added to the dummy model. Moreover, some structural elements affecting the simulation results such as the connecting bolts or the ground have been adequately modeled. Finally there have been analyzed diverse types of current motorcyclists protection systems, for which it has been made a comparative numerical–experiment analysis to validate the numerical results and the methodology used.     

Long-term analysis of the impact of longitudinal barriers on motorway safety

The objective of this study was to assess the influence of longitudinal barriers located on the median strips and hard shoulders of toll motorways on crash severity in vehicles running off the roadway. The study was based on crashes involving injury and property damage only, recorded from 1996 to 2010 on a French toll motorway network of about 2000 km.     

高速公路护栏的冲击动力学分析有限元模型

为了对高速公路护栏系统开展全面的冲击动力学分析及其优化设计,建立了高速公路波形梁护栏系统受冲击荷载作用的有限元模型,并对建立的护栏系统模型进行了合理性的检验.采用FEMB软件作为前处理软件,首先根据行业规范建立起包含波形护栏梁、防阻块以及立柱的护栏系统有限元模型,将建立好的三跨缩比护栏系统的有限元模型在冲击条件下与相应的冲击试验进行对比分析,检验了模型的有效性.由于真实护栏系统是多跨连续的,通过对比不同跨数的模型在冲击条件下的结果,确定了足够反映真实多跨连续护栏的合理跨数.结果表明,建立的有限元模型可准确有效地反映真实护栏系统的特性,可用于护栏系统的冲击动力学分析及其优化设计.