If an object revolves around a circular path at the speed of light could it still generate gravitational waves and what would be the simulation in inner area?
closed as unclear what you're asking by Rob Jeffries, John Rennie, user36790, CuriousOne, ACuriousMind♦ Jul 22 '16 at 11:12
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Object can't go with the speed of light on the Special Relativity, on which the General Relativity is based upon. The gravitational waves are predicted and calculated by the General Relativity, i.e. if you are talking about them, you are using the terminology of a theory which closes out the things going with the speed of the light.
But we can talk about an object near the speed of light.
It doesn't need to go with around $c$. If it accelerates, it produces gravitational waves and if it is on a circular orbit, it accelerates. (With some exception: for example an (around it centre) rotating planet doesn't emit GW.)
Note: in "normal" situations, this "gravitational radiation" is very small. For example, the orbit of the Earth around the Sun produces only 200W. The whole planet.