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I am attempting to find the natural frequency of my staircase model as shown below using the total weight of the structure distributed evenly over every node as a nodal mass in the Ty direction. My issue is, I am able to get a frequency running the dynamic…

I have a stair that I'm concerned may be susceptible to vibrational issues. I've often used RAM Elements to model a variety of stair configurations under gravity loads and ELF seismic loading, but can it also be used to check for vibration? Most of the…