I have modeled a delta type parallel manipulator for performing CPR operation.
The model does 100 compressions per minute with a vertical displacement of 4-5 cm, which is the requirement of the CPR.
A rigid body is attached to the end effector and I need to model a human chest using a spring damper system.
The exists a spring-damper block in the 1D Mechanical translation category. I have previosly modeled a spring damper mechanical system using these blocks but I have never tried connecting these to a Multibody.
The spring and damper coefficients of a human chest are k=8350 N/m and c=500 Ns/m.
My model is here: 
Can you help me model the human chest?