COSMOSMotion questions

I am trying to simulate a single degree of freedom system with no damping

http://www.designgenerator.com/MME381/lecture 02/lecture 02 models/sdof.jpg

but for some reason results show damped vibrations. I have not defined any
friction on joints so where is this damping coming from? Is there a default
damping defined somewhere?

If you would like to look at the model it is here:
http://www.designgenerator.com/MME381/lecture 02/lecture 02 models/sdof.zip

thank you for your help

Paul

 

Can you provide a frequency amplitude plot and the parameters of your system
(or what you think they are). m, k

 

m = 0.192kg
k = 500N/m

also, how do you define initial displacement?

thanks

Paul

 

m = 0.192kg
k = 500N/m

thanks

Paul