volume element using python scripting in PLAXIS 3D

Dear Rituraj Singh Sujawat,

I am not sure what you mean by your question. 

Do you ask how to use the array command in PLAXIS 3D? 

Or do you need help creating copies of a volume structure with Python commands?

For the first, the array command is also explained in our Scripting reference: https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45447/scripting-reference-and-how-to-use-it

Practically you would array the whole volume element and then provide the parameters for the command.

In case you want to "implement" the array with Python, I guess you would need a function that creates the volume and each time run different parameters when it comes to the location, size, etc.