Is there a way to apply restraints or forces or displacements etc to multiple nodes at once?

Sorry, but "no".

OK thanks for response, I've ended up having to model them in autopipe, I have several sets of spools in excess of 100m each so it was taking forever to enter restraints and individual stiffnesses for the bilinear restraints. If anyone knows an easier or quicker way let me know, Caesar is my preference but my boss is an autopipe man.

I'm trying to think of what type of system requires "many bi-linear restraints" over 100m runs. Are you modeling buried pipe?

If the spools are similar, you could use the Duplicate function to copy a block on nodes. I do that a lot if I have a really long pipe or identical pump legs off a header. Speeds things up.

Thanks,
Duncan

Yeah several long sets of spools. Thanks, I started the model again and used duplicates!