Shape (?) Optimization for 1D Elements

Hey guys,

I was wondering if it is possible to setup the following optimization problem.

Lets say I have a set of nodes and bar elements. This framework has some loads and boundary conditions.

I am not sure if the node position of each node is optimal regarding compliance.

I would like to define 'shapes' for the nodes where I can set some pertubations e.g. Node x can move in a sphere of radius y.

I have not seen this kind of optimization although I think it must be possible from an algorithmic point of view. Any suggestions?

Thanks!