Attached is your blocks and joints but I added springs of 1000 lbf/in between each block. I added a Modal system to learn that the modal frequencies of this system are about 30 Hz, 83 Hz and 120 Hz. Knowing those frequencies helped me choose the End Time and Time Increments for the Transient solution. I also added some damping in the Damping Controls.nHere is a plot of point P. I think this is the type of plot you were looking for.n