Performance Improvement of Recently Updated FE Dummy Models - Humanetics
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The document discusses updates and performance improvements of various finite element (FE) dummy models, including the H3-50, ES2, and Q-series models, focusing on enhancements made based on customer feedback and expert recommendations. Key adjustments include modifications to mass distribution, stiffness curves, and the addition of friction joints to optimize model responses during certification tests. Overall, these updates aim to improve correlation with actual test results and enhance the overall performance of the dummy models.
Performance Improvement of Recently Updated FE Dummy Models - Humanetics
- 1. Performance Improvement of Recently Updated FE Dummy Models Nishant Balwan Humanetics Innovative Solutions, Inc
- 2. Content 0. Introduction 1. H3-50 Express Dummy Model 2. H3-50 FE Dummy Model 3. ES2 Dummy Model 4. ES2-RE Dummy Model 5. Q1 Dummy Model 6. Q1.5 Dummy Model 7. Q6 Dummy Model 8. Discussion and Conclusion
- 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. Chapter 1 H3-50 Express Dummy Model
- 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. 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. 1.3 H350 Exp – Thorax Certification Test • Speed: 6.7m/s • Mass: 23.36kg Test 1 Test 2 v7.1 v7.1.1
- 8. Chapter 2 H3-50 FE Dummy Model
- 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. 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. 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. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
- 13. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
- 14. 2.3 H350 FE – PDB Sled Test Test 1 Test 2 Test 3 v7.0.1 v7.1
- 15. Chapter 3 ES2 Dummy Model
- 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. 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. 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. 3.3 ES2 - WSU Sled Test Test 1 Test 2 Test 3 v4.1.1 v4.1.3
- 20. 3.3 ES2 - WSU Sled Test Test 1 Test 2 Test 3 v4.1.1 v4.1.3
- 21. Chapter 4 ES2-re Dummy Model
- 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. Chapter 5 Q1 Dummy Model
- 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. 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. 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. 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. Chapter 6 Q1.5 Dummy Model
- 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. 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. 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. 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. 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. 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. Chapter 7 Q6 Dummy Model
- 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. 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. Chapter 8 Discussion and Conclusion
- 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. Acknowledgement HUMANETICS THANKS ALTAIR AND FORD FOR THEIR HELP AND COOPERATION THROUGHOUT THESE PROJECTS