Can I Use a Non-Symmetrical Matrix in Simulink for My 2 DOF Vibration System?

[Karimh]

Homework Statement

I have the following system, I believe I've correctly established the equations. I'm having trouble building a working schematic bloc in Simulink.

Homework Equations

The Attempt at a Solution

In the following equations Ktrain = Ka and Ctrain = Ca

I know my matrix should be symmetrical but isn't because of Y(S), is it okay to proceed in this fashion when the situation requires it?

The resulting schematic bloc

I don't know how to use CaS+Ka in simulink so I attempted to simply multiply the 1st and second bloc. The result always end up being infinite to any input of Y(S)

 

[Karimh]

Silly mistake the return block shouldn't have been negative