I am looking to change the array name dynamically... How this can be possible?

It's possible using a Perl feature called "symbolic references", but they are usually a very dangerous idea. So dangerous, in fact, that one of the effects of adding "use strict" to your program (and you should _always_ add "use strict" to your program) is to ban their use.

I know you think that this is the best solution to your problem, but it really isn't. There's always a better solution.