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Introduction to Passive Safety


  • Alexan­der Gromer

Introduction to Passive Safety


  • You should be fa­mil­iar with LS-DY­NA®.


This class presents the most im­por­tant fea­tures of LS-DY­NA with re­spect to oc­cu­pant safe­ty sim­u­la­tions. In­sights will be pro­vid­ed on how to deal with the var­i­ous com­po­nents in­volved, such as airbags, seat­belts, crash-test dum­mies and seats. Dur­ing this train­ing, par­tic­u­lar em­pha­sis will be on mod­el­ing meth­ods for prac­ti­cal ap­pli­ca­tion.

This course is main­ly de­signed for be­gin­ners work­ing in the field of oc­cu­pant safe­ty (es­pe­cial­ly deal­ing with side, frontal, and rear im­pact). We will pro­vide an overview of state-of-the-art airbag mod­el­ing and ex­plain the fun­da­men­tals re­gard­ing the com­po­si­tion of an LS-DY­NA oc­cu­pant safe­ty sim­u­la­tion, in­clud­ing the po­si­tion­ing and fit­ting of seat­belts to the dum­my and the de­f­i­n­i­tion of rec­om­mend­ed con­tacts be­tween the safe­ty sys­tems. At­ten­dees will be giv­en the op­por­tu­ni­ty to ap­ply their ac­quired knowl­edge in sam­ple ex­er­cis­es.


  • Overview of cur­rent im­pact load cas­es: side, frontal, rear crash
  • Avail­able dum­my mod­els in LS-DY­NA and their val­i­da­tion meth­ods
  • Ma­te­ri­als, el­e­ments, & con­nec­tions used for oc­cu­pant safe­ty sim­u­la­tions
  • Overview of com­po­si­tion and us­age of safe­ty-rel­e­vant ve­hi­cle com­po­nents
    • Seat, in­te­ri­or, airbags
    • Body-in-white mod­el­ing
  • Us­age of dum­mies
  • Overview of po­si­tion­ing meth­ods
    • Po­si­tion­ing in­side the ve­hi­cle with OASYS PRIMER® and LS-Pre­Post®
  • Set­tling of dum­mies
    • Pre-stress in seat cush­ion foams
  • Us­age of seat belts
    • Mod­el­ing seat belts, sliprings, & pre­ten­sion­ers
    • Fas­ten the seat belt for the dum­my with OASYS PRIMER® & LS-Pre­Post
  • Eval­u­a­tion of the re­sults
    • Dum­my sig­nal eval­u­a­tion
    • In­jury cri­te­ria
  • Ex­am­ple of a mod­u­lar oc­cu­pant safe­ty mod­el
    • Ap­pro­pri­ate com­po­si­tion and struc­ture
    • Con­tact be­tween com­po­nents