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Investigating Effects of Parameters on Vehicle Impact Dynamics Using LS-DYNA

This study aims to explore the individual effects of several parameters on vehicle impact dynamics using the GM_R4 vehicle model and ESP-N2 barrier model with LS-DYNA V970rev.5434a. Key variables investigated include impact conditions, material properties, and processing procedures, with a baseline run featuring a vehicle mass of 893kg, impact speed of 100km/h, and impact angle of 20 degrees. Results indicate that factors like impact speed and yield stress significantly influence outcomes, though processor quantity shows minimal effect. Detailed records of model runs are essential for future assessments.

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Investigating Effects of Parameters on Vehicle Impact Dynamics Using LS-DYNA

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Presentation Transcript

  1. Parameter Study - Objective • To investigate the individual effect of a number of parameters: • Impact Conditions • Material Properties • Software Control • Processing Power

  2. Base Line (Reference) Model Run • Vehicle Model: GM_R4 • Barrier Model: ESP-N2 • Number of CPUs: 4 • LS-DYNA Version: V970rev.5434a • Vehicle Mass: 893kg • Impact Speed: 100km/h • Impact Angle: 20deg

  3. Base Line Results • ASI: 0.80 • THIV: 23.7kph • PHD: 12.86g • Dynamic Deflection: 666mm • Working Width: 748mm • Exit Speed: 81.49kph • Exit Angle: 7.57deg

  4. Changes in Impact Conditions

  5. Changes in Impact Conditions (%ages)

  6. Changes in Impact Conditions (%ages)

  7. Changes in Material Properties

  8. Changes in Material Properties (%ages)

  9. Changes in Material Properties (%ages)

  10. Changes in Processing Procedure * Added mass changed: causing the differences to the baseline

  11. Changes in Processing Procedure (%ages)

  12. RESULTS • All of the factors examined have had an effect on the final results to different levels (with the exception of the number of processors). • In particular: • Increases to the impact speed • Changes to the material Yield Stress • Increases to the rail and post thicknesses • The records kept of model runs should be detailed and record as much information as possible, including aspects such as: • Impact Conditions • Material Properties • Software used • Although there are many more factors which we have not been able to examine to date.

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