Spring reaction force

[FEAnalyst]

@andnee

spring constraints are always assumed to connect to the ground (i.e. the spring is fixed at one end), whereas I’d rather have the spring be connected between two nodes;

Indeed, this was already requested here but has to wait for its turn: Spring between two nodes

@andnee

I am unable to obtain the reaction force in the spring.
Can somebody confirm and explain how I get the spring constraint reaction force ?

With this type of spring element (spring to ground) you can only request the reaction forces for the node to which the spring is attached.

@andnee

Also, I fail to see any possibility to include rotational springs, although a node is endowed with rotational DOFs. Therefore I had to apply a BC and block those rotation. Personally I feel some consistency may be missing here. Is it a problem with Prepomax not supporting the feature or it is altogether missing in Calculix ?

It’s a CalculiX limitation but there are potential workarounds: Torsional Spring - SPRING2? - CalculiX