Effects to look at include Trapcode’s Shine (www.trapcode.com), Radial Blur (or CC Radial Blur/CC Radial Fast Blur), and CC Light Rays. All of them accomplish something similar to what you’re looking for (although I would consider CC Light Rays the worst choice).
Shine and Radial Blur (set to zoom) need a layer to use as the source for the rays. I would suggest doing something simple like looping 2 simple strings of gibberish text (askhlznx?awlekhb might work) in a back and forth motion on a 3D layer (keyframe the position). Then apply Radial Blur or Shine on an adjustment layer above this and try different orientations for the text and different source points for the effect.
Another option would be to use some simple high contrast fractal noise instead of text as the basis for the effect.
Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA