Footfall induced vibration

[LMW]

Homework Statement:

Find real responde mode 1

Relevant Equations:

How to find the same results as in the book

Hey guys. Im about to learn about footfall induced vibration. However i want to reach the same results as in the pdf page 44 ''design guide for footfall analysis''

i get 0.000726 while they get 5,79E-0,4.

Can anyone help me figure out what im going wrong and where i have made a mistake?

 

[DrClaude]

I'm not sure I get how to calculate the $\mu$. Otherwise, the only error I can find in your calculation is that $\zeta_m$ should be 1.5%, not 0.9%, but this is not sufficient to explain the discrepancy.