Problem:

I am modeling a pipe connecting to a pump which is sitting on an inertia block. How do I actually take into account the effects from the spring holding the pump base?

Solution:

Suggest the following modeling approach:

1. Model the pump with rigid pipe properties that does not consider weight.

2. Create base holding the pump using rigid beam components that does not consider weight.

3. Add the spring supports to the beam.

4. Use Insert Extra Data> Additional Weight as needed in the various locations that total the combine weight of the pump and base (hidden by vertical beam in image below). 

Note: this modeling technique can be applied to other scenarios besides pump supported base. 

See Also

Beam Structure modeling

Bentley AutoPIPE