CRAHVI D4.2.11: Generation of an A321 DRI-KRASH Model

This report describes the generation of a full-scale Airbus A321 DRI-KRASH model a DLR contribution to CRAHVI Task 4.2. The model is used in simulations in Task 4.3 in order to generate inputs for the resulting CRAHVI load database. A large amount of the geometric and property information - required for the development of the KRASH model - was derived from an A321 NASTRAN model provided by Airbus France. A key feature in the DRI-KRASH modelling technique is the pre-definition of the non-linear force-deflection behaviour of larger structural areas. Results of tests which were carried out on A320 sub-structures in an earlier European programme (IMT Programme Crashworthiness for Commercial Aircraft /2,3/) were used for the definition of spring characteristics, plastic hinge moments and other non-linear properties in the KRASH model. Some other data, such as the deformation characteristics and failure loads of the engines in the case of the A321 extremely important in crash landings could be taken over from an A320 DRI-KRASH stick model which was generated earlier by DLR /5/. This report also gives an overview about structural sections, in which the existing database can be described as insufficient and thus may lead to deficiencies in the KRASH model