Evaluation of RADIOSS Human Model (HUMOS II) for Aircraft Side Facing Seats Applications

Innovation Intelligence®

Evaluation of RADIOSS Human Model

(HUMOS II) for Aircraft Side Facing Seats

applications

Anaïs GARO, PhD ; Franck NJILIE, PhD ; Martin Poupeney

Altair Development France

Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.

Introduction : Context

• Federal Aviation Administration (FAA) regulations

primarily focus on injury mitigation in frontal and

vertical ”survivable” impacts (Title 14 of the CFR

parts 25.562, 23.562, 27.562, 29.562)

• Necessity to provide similar protection to passenger

in side facing seat

• A Project was conducted by the FAA Civil Aerospace

Medical Institute (CAMI) to evaluate the suitability of

a side impact dummy, the ES2, in assessing injury

risk in a typical side facing seat configuration

• The purpose on this work was to evaluate RADIOSS

Human body model in similar test conditions

• HUMOS II might further be used to investigate injury

mechanism and develop adequate injury criteria for

aircraft side facing crash scenarios


RADIOSS HUMOS II (HUman MOdel for Safety) : Created for

automotive crash applications

Adaptation of the model seating posture for aerospace applications

RADIOSS HUMOS II AERO model

RADIOSS HUMOS II model

Sitting height

(mm)

Standing height

(mm)

Weight

(kg)

HUMOS subject 920 1730 77

50th Percentile

European male 915 1750 75.5

BCS

Rotate

Center of

rotation


RADIOSS HUMOS II model

Accelerometers : head, pelvis, upper and the lower spine

Rib deflection transducers

Force: lumbar and pubic

L4

L5

Joint

Disc


Load cases based on CAMI (Civil Aerospace Medical Institute) work

• Restraint system : Conventional three point belt

• 16 g, 44 ft/s, horizontal impact specified in 14 CFR part 25.562 (without yaw)

• Seats covered with foam cushion

Load cases : typical aircraft side facing scenarios

Close wall test Arm-rest test

Assessment of injury potential in aircraft side-facing seats using the ES2 anthropomorphic test dummy, DeWeese R. and Moorcroft D., 2007, FAA


Results and discussion : close wall

Kinematics and Accelerations


Fractures




Forces

Pubic Resultant force

Lower lumbar Fy


Rib deflection

→ Rib cage modeling



Kinematics

Results and discussion : Arm rest


Acceleration

Forces



Rib deflection

→ Kinematics differences



Conclusion

RADIOSS HUMOS II aerospace model is updated and successfully

evaluated within aerospace context : forward and side facing test

configuration

The updated HUMOS II model allows to capture and predict potential

injuries ATDs such as ES 2 cannot highlight due to their stiffness

However, further validations are required using PMHS test data in

aerospace load cases


Acknowledgments

Gerardo Olivares and Luis Gomez from National Institute for Aviation

Research (NIAR), Wichita Kansas, USA

David Moorcroft, Richard Deweese from FAA CAMI, Oklahoma City,

USA

Date post:	06-May-2015
Category:	Engineering
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