Performance Improvement of Recently Updated FE Dummy Models - Humanetics

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With both versions of full FE dummy model and simplified “express” dummy model being introduced to vehicle design applications, the need to improve dummy models predictability is sought by taking into account of accuracy, cpu cost, and efficiency. The Hybrid-III family dummy models have been updated according to users input and application needs. This paper will present the latest modifications and performance improvement of H305 and H350 dummy models on component level as well as full dummy assembly level.

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Performance Improvement of Recently Updated FE Dummy Models - Humanetics

  1. 1. Performance Improvement ofRecently Updated FE DummyModelsNishant BalwanHumanetics Innovative Solutions, Inc
  2. 2. Content0. Introduction1. H3-50 Express Dummy Model2. H3-50 FE Dummy Model3. ES2 Dummy Model4. ES2-RE Dummy Model5. Q1 Dummy Model6. Q1.5 Dummy Model7. Q6 Dummy Model8. Discussion and Conclusion
  3. 3. 0.0 Introduction• Humanetics is closely working with customers and Radioss experts (Altair) to improve the performance of FE dummy models.• This presentation covers performance of Radioss code dummy models after recent updates.• Theses updates are feedback or issues from • Customers • Radioss experts • Internal requests
  4. 4. Chapter 1H3-50 Express Dummy Model
  5. 5. 1.1 H350 Exp – Release Updates• Current Release: v7.1.1• Updates from v7.1: 1. Added ankle friction joint • To apply friction moments 2. Adjusted mass of dummy to 78.68kg (including shoes) • Illustration on next slide 3. Modified chest stiffness spring • Stiffness curve were scaled down to achieve better correlation 4. Added neck stop angle • Neck stop angle added to limit neck moment to ±5⁰ 5. Modified inertia of the joints springs • Inertia was increased to reduce noise level in responses
  6. 6. 1.2 H350 Exp – Mass Distribution Assembly Express Model (kg) FE Model (kg) Physical Model (kg) Head Assembly 4.46 4.46 4.45 0.05 Neck Assemby 1.43 1.43 1.54 0.05 Upper Torso Assmebly 16.84 16.84 17.19 0.36 Lower Torso Assembly 19.88 19.88 23.04 0.36 Upper Leg Assembly, Left 7.39 7.39 5.99 0.09 Upper Leg Assembly, Right 7.38 7.38 5.99 0.09 Lower Leg Assembly, Left 5.51 5.51 5.44 0.14 Lower Leg Assembly, Right 5.51 5.51 5.44 0.14 Upper Arm Assembly, Left 2.19 2.19 2.00 0.05 Upper Arm Assembly, Right 2.19 2.19 2.00 0.05 Lower arm/Hand Asssembly 2.40 2.40 2.27 0.09 Left Lower arm/Hand Asssembly 2.41 2.41 2.27 0.09 Right Total Mass 77.58 77.58 77.70 1.18
  7. 7. 1.3 H350 Exp – Thorax Certification Test• Speed: 6.7m/s• Mass: 23.36kg Test 1 Test 2 v7.1 v7.1.1
  8. 8. Chapter 2H3-50 FE Dummy Model
  9. 9. 2.1 H350 FE – Release Updates• Current Release: v7.1• Updates from v7.0.1: 1. Added ankle friction joint • To apply friction moments 2. Modified inertia of the joints springs • Inertia was increased to reduce noise level in responses 3. Modified positioning angle (RY) to 22.5⁰ • Release position of dummy is modified. Global Y-axis angle is adjusted to 22.5⁰
  10. 10. 2.2 H350 FE – Thorax Test• Speed: 3.0m/s• Mass: 23.36kg Test 1 Test 2 Test 3 v7.1 v7.1.1
  11. 11. 2.3 H350 FE – PDB Sled Test• PDB sled is rigid sled with belts and without airbags.• It is used to rate the performance of frontal impact dummies. Acceleration Pulse Setup
  12. 12. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
  13. 13. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
  14. 14. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
  15. 15. Chapter 3ES2 Dummy Model
  16. 16. 3.1 ES2 - Release Updates• Current Release: v4.1.3• Updates from v4.1.2: 1. Hip friction joints were added • To apply friction moments 2. Ankle friction joints were added and updated X and Z DOF for positioning • To apply friction moments 3. Lower neck friction joint was added and provided Y DOF for positioning • To apply friction moments 4. Lumbar spine bent angle was updated to 3⁰ • For better positioning in vehicle against the seat back angle was modified from 6⁰ to 3⁰ 5. Arm to rib edge contact was added 6. Upper arm foam and rib foam stiffness are tuned • Stiffness curves were scaled down to achieve better correlation.
  17. 17. 3.2 ES2 - Certification Tests• Speed: 4.3m/s Test 1 Test 2 v4.1.1 v4.1.3• Mass: 23.4kg Pelvis Certification Shoulder Certification
  18. 18. 3.3 ES2 - WSU Sled Test• WSU Sled Setup: • It is used to rate the performance of side impact dummies Sled mass: 317 kg Velocity: 8.9 m/s Imposed Velocities - ES2 WSU test 10 9 8 Velocity, m/s 7 6.8 m/s 6 8.9 m/s 5 4 0 50 100 150 200 Time, ms Acceleration Pulse Setup
  19. 19. 3.3 ES2 - WSU Sled Test Test 1 Test 2 Test 3 v4.1.1 v4.1.3
  20. 20. 3.3 ES2 - WSU Sled Test Test 1 Test 2 Test 3 v4.1.1 v4.1.3
  21. 21. Chapter 4ES2-re Dummy Model
  22. 22. 4.1 ES2-re – Release Updates• Same updates has been applied to ES2-re dummy as that of ES2 and similar response had been found out.
  23. 23. Chapter 5Q1 Dummy Model
  24. 24. 5.1 Q1 – Release Updates• Current Release: v1.0• Updates : 1. This RADIOSS release model is build from Humanetics existing FE model beta released version 1.0 2. Some additional fine tuning was made in order to improve the Radioss model response
  25. 25. 5.1 Q1 – Head Certification Test• Certification Test - Frontal• Drop Height - 130mm• Updates - Improved friction between head and rigid plate Test 1 Test 2 Test 3 v1.0 v1.0 Updated 28°±2° Head Rigid Plate
  26. 26. 5.1 Q1 – Head Certification Test• Certification Test - Lateral• Drop Height - 130mm• Updates - Improved friction between head and rigid plate Test 1 Test 2 Test 3 v1.0 v1.0 Updated 55°±2° Head Rigid plate
  27. 27. 5.2 Q1 – Thorax Certification Test• Certification Test – Frontal• Speed – 4.3 m/s• Updates – Modified the position of pendulum and tuned the rib skin material Test 1 Test 2 Test 3 v1.0 v1.0 Updated
  28. 28. Chapter 6Q1.5 Dummy Model
  29. 29. 6.1 Q1.5 – Release Updates• Current Release: v1.0• Updates : 1. The FE model was created based on physical Q1.5 dummy Rev B JULY 2009. 2. Radioss FE model is created from the above mentioned model. 3. Material data for arms and leg are not provided, thus those include in the model are fictive and need enhancement.
  30. 30. 6.2 Q1.5 – Head Certification Test• Certification Test – Frontal• Drop Height - 130mm• Updates – Tuned head skin material Test 1 Test 2 Test 3 v1.0 v1.0 Updated 28°±2° Head Rigid Plate
  31. 31. 6.2 Q1.5 – Head Certification Test• Certification Test - Lateral• Drop Height - 130mm• Updates –Tuned head skin material Test 1 Test 2 Test 3 v1.0 v1.0 Updated 55°±2° Head Rigid plate
  32. 32. 6.3 Q1.5 – Neck Certification Test• Certification Test – Frontal; Speed: 3.9m/s• Updates - RADIOSS development made some correction in OGDEN material law in v11. To tune the model for v11 OGDEN material property definition has been modified Test 1 Test 2 Test 3 v1.0 v1.0 Updated
  33. 33. 6.3 Q1.5 – Neck Certification Test• Certification Test – Lateral; Speed: 3.9m/s• Updates - RADIOSS development made some correction in OGDEN material law in v11. To tune the model for v11 OGDEN material property definition has been modified Test 1 Test 2 Test 3 v1.0 v1.0 Updated
  34. 34. 6.4 Q1.5 – Thorax Certification Test• Certification Test – Frontal• Speed 4.3 m/s• Updates – Modified the position of pendulum and tuned the rib skin material Test 1 Test 2 Test 3 v1.0 v1.0 Updated
  35. 35. Chapter 7Q6 Dummy Model
  36. 36. 7.1 Q6 – Release Updates• Current Release: v0.2• Updates : 1. This RADIOSS release model is build from Humanetics existing FE model beta released version 0.2 2. Some additional fine tuning was made in order to improve the Radioss model response
  37. 37. 7.2 Q6 – Thorax Certification Test• Certification Test – Frontal• Speed - 4.27m/s• Updates – Modified contact stiffness between jacket and pendulum Test 1 Test 2 v1.0 v1.0 Updated
  38. 38. Chapter 8Discussion and Conclusion
  39. 39. Discussion and Conclusion• H350, ES2, ES2-re and Q-series dummy models were updated.• For H3-50 Express model: • Mass distribution was adjusted to match FE model. • Chest stiffness adjusted to achieve better correlation for certification test.• H3-50 FE Model: • Noise levels are reduced for H3-50 by modifying spring inertia which in turn helped to improve correlation.• ES2 and ES2-re Models: • Lumbar spine angle was adjusted to position the model in seat according to test setup. • Adding additional contact and modifying pelvis and rib material improved correlation of certification tests• Q-series Models: • With tuned materials and properties, models showed better correlation for head drop and thorax certification test. • More enhancements would be made to improve the models as these models are first build levels• In most of the cases recently applied modifications tend to improve the performance of the dummy models.
  40. 40. AcknowledgementHUMANETICS THANKS ALTAIR AND FORD FOR THEIR HELP AND COOPERATION THROUGHOUT THESE PROJECTS

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