Error in assembly analysis

[rosthegr8]

hi guys, I am a starter with inventor.I was doing a static stress analysis for a small assembly I got following errors.

1)Model separates into 2 independent components.

2) soft spring was added

.How can I eliminate this error??

plss help as I have to complete this work ASAP.:(

[JDMather]

Neither one of those messages is an "error".

An assembly without parts is useless - I recommend returning to the basics before moving on to FEA.

An assembly file (*.iam) is only a list of hyperlinks to the part files (*.ipt) and a record of assembly constraints (and a bit more).

You must include the part files.

With an entire assembly (that includes parts) someone can explain the reason for each message.

In general - an assembly FEA quite frequently can and should separate into different components, and if there is a remaining DOF a soft spring will be needed to limit motion (typically along the axis of a fastener).

What book are you using to learn Inventor FEA?

[rosthegr8]

I have a washer which has a rotational dof. how can I constrain it?

[JDMather]

Does it really have anything to do with the analysis - if not then right click on it an Exclude from analysis.

If it does, then the Soft Spring added by Inventor might be all that is needed

or

add a Mate constraint between the workplane going through the center of the washer and the shaft or whatever part it is constrained to, to remove the the DOF.

I recommend a stronger understanding of the basics of Inventor before moving to FEA, especially assembly FEA.