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Innovation Intelligence®
Evaluation of RADIOSS Human Model
(HUMOS II) for Aircraft Side Facing Seats
applications
Anaïs GA...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Introduction : Context
• Fede...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
RADIOSS HUMOS II (HUman MOdel...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
RADIOSS HUMOS II model
Accele...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Load cases based on CAMI (Civ...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Results and discussion : clos...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Fractures
Results and discuss...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Results and discussion : clos...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Rib deflection
→ Rib cage mod...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Kinematics
Results and discus...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Acceleration
Forces
Results a...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Rib deflection
→ Kinematics d...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Conclusion
RADIOSS HUMOS II a...
Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved.
Acknowledgments
Gerardo Oliva...
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Evaluation of RADIOSS Human Model (HUMOS II) for Aircraft Side Facing Seats Applications

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The Federal Aviation Administration (FAA) has defined the requirements for aircraft seat certification concerning the emergency landing dynamic conditions for different categories of airplanes and rotorcrafts. This regulation is primarily focused on backward and forward facing seats.

In order to make the certification tests, the aircraft manufacturers use Anthropomorphic Test Devices (ATD), representative of the human body. Numerical modelling tools such as finite elements models are now used to facilitate the evaluation of aircrafts seating systems (AC 20-146 2003). In that case, numerical ATD are used. However, they are not as biofidelic as human numerical model. The benefits of human body models in term of realistic behavior, injuries prediction or specific organs studies are important.

In 2006, the European Commission, with many partners from the automotive industry, sponsored the creation of the Human Model for Safety 2 (HUMOS 2), a human finite element model. This model has been then adapted to be used in aircraft crash scenario (Njilie 2012), leading to the HUMOS2 AERO model. It has been validated in FAA fontal and vertical load cases conditions.

However, in the field of business jets, side-facing seats are quite popular. The risk of injury is totally different between side facing and forward facing seats (Philippens 2011). As a consequence, there is need to understand more precisely the human behavior in these specific conditions of impact during survivable emergency landing.

The purpose of this study was to adapt and improve the HUMOS2 AERO model to side facing tests conditions and to investigate the injury mechanism. The other objective was to compare the response of the human model to the ES2-re model, a side impact ATD.

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

  1. 1. 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
  2. 2. 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
  3. 3. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. 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
  4. 4. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. RADIOSS HUMOS II model Accelerometers : head, pelvis, upper and the lower spine Rib deflection transducers Force: lumbar and pubic L4 L5 Joint Disc
  5. 5. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. 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
  6. 6. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Results and discussion : close wall Kinematics and Accelerations
  7. 7. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Fractures Results and discussion : close wall
  8. 8. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Results and discussion : close wall Forces Pubic Resultant force Lower lumbar Fy
  9. 9. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Rib deflection → Rib cage modeling Results and discussion : close wall
  10. 10. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Kinematics Results and discussion : Arm rest
  11. 11. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Acceleration Forces Results and discussion : Arm rest
  12. 12. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. Rib deflection → Kinematics differences Results and discussion : Arm rest
  13. 13. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. 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
  14. 14. Copyright © 2012 Altair Engineering. Inc. Proprietary and Confidential. All rights reserved. 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
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