provide the best design for protecting KTH [5]。 More study is still needed to decide if this set of parameters is still valid for impact loading conditions not studied in this work。

This paper outlines the multi-block method for rapid generation of high quality hexahedral elements。 Convergence of the model can be checked with different mesh density to determine which mesh size converged properly。 Processes used in designing a safer vehicle, from material property modeling to major crash energy absorption component modeling to whole vehicle with occupant modeling were delineated。 If this hierarchical approach is used carefully, the whole vehicle model can be used to evaluate structural integrity with great accuracy and occupant responses can be predicted precisely to determine if the vehicle meets the expected safety rating。 An exemplary modeling approach was reported to determine mechanical properties of magnesium alloy。 The same method canbe used for other materials to build a complete material library。 Next, component models can be developed and validated to determine the geometry of major energy absorption components。 A detailed whole vehicle model can then be built to determine safety rating for frontal, side, or rear-end impacts。 Finally, an example was given to demonstrate how to select proper parameters in vehicle safety design to improve occupant safety。

Modern vehicles are much safer than their predecessors。 This is in part due to safety regulations prescribed in various regions of the world and the use of crash dummies。 However, continue improvement invehicular safetyrequires differentsetof tools。

The National Highway Traffic Safety Administration in its five-year research plan announced this year indicates that computer models will be one of the key emphases inthe next five years [6]。The nextwave of safety may be related to using whole bodyhuman

models to evaluate vehicular safety instead of using crash dummies that are uni-directional and of only limited number of sizes。 OEMs need tobeready for this new trend of design processes if American market is among one of their considerations。

Reeffeerreenncceess::

[1] KOPPEAL S, CHARLTON JL, FILDES BN, etal。

How Important is “Vehicle Safety” in the New Vehicle [4] ZHU F, CHOU C,YANG K H。 Calibrating Material Constants toModeltheComponents Madeof Die

Purchase Process?[R]。 EU Commission Report, project Case AM60B Magnesium Alloy for AMD904 Task 2。1

no。 SUB/B27020B-E3-S07。17321-2002。 Magnesium Crashworthiness[R]。 Final Report, US

[2] SUTHERLAND I。 (Sketchpad: A Man-Machine Graphical Communication System[R]。 AFIPS, SJCC 23, 1963:329-346。

[5] Automotive Materials Partnership, Southfield, MI。

KIM YS, CHOI H H, PARK Y J, et al。 Numerical Investigation ofInteractions between the Knee-Thigh-

[3] MAO H, GAO H, CAO L, et al。 Development ofHigh- Hip Complex with Vehicle Interior Structures[J]。Stapp

Quality Hexahedral Human Brain Meshes Using Feature- Car Crash Journal, 2005, 49:85-115。

BasedMulti-Block Approach” Acceptedfor Publication [6] NHTSA’sBiomechanics Research Plan,2011-2015[Z]。

in Computer Methods in Biomechanics andBiomedical June 2011, DOT Document HS 811 474。摘要

在过去的10 年中，研究人员发现车辆安全性是影响消费者购车的一个重要因素。但是世界各地使用不同的车辆碰撞测试评价规程，提供不同的安全信息给消费者。从认证的角度来看，这些安全标准的差异使得制造商（OEMs）难以生产出能在全球销售的汽车。在现代工业中，计算机辅助设计（CAD）和计算机辅助工程（CAE）已得到广泛应用以降低开发成本和缩短设计周期。在原型车进行试验之前，许多类似的设计可以在计算机上进行评估。随着计算机性能的不断提升，为满足众多的甚至相互冲突的安全标准的规定，数学模型已经成为不可或缺的工具。本文将讨论分层次的CAE模型验证方法，通过计算机试验设计（DOCE）获取约束系统最佳参数的方法，以及下一阶段的被动安全法规。