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Head Injury Criterion

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Hi everybody!

I've got some troubles with a project I'm working on for a universtity class. I have the curve of the head acceleration of a dummy in g/s (obtained with a crash simulation using LS-Dyna) from which I have to calculate the HIC. I enabled the "Vehicle safety tools", went on injury-HIC- Hic-Curve, chose the accelaration curve from the pull-down menu and set 30 ms windows length and finally clicked on apply. The problem is that nothing happen, I mean after a few second appear an empty graph with only x-y axis. I'm on my first experience with Hyperworks, I searched on the online guide but I didn't find anything about it.

Does someone have any idea of what could be my problem? Thanks for help!

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