Hyperworks Student Edition does not support LSDYNA export.
That really stinks, they must have updated their student license limitations this year. Honestly, it never hurts to contact them and ask? You could get in touch with somebody in your department and see if there is any budget to pay to a limited license.
Alternatively, you can use something else for meshing. Depending on how advanced you are going, you could use LS-PrePost's built-in meshing tools. It won't be as glamorous, but it can get the job done. If you choose to go this route let me know and I can try to get you started and acclimated with it.
There are other free meshing software like IA-FEMesh (link below) which are even less intuitive but better at things like hexahedral meshing