Not exactly the same structure nor as dynamic but when we are tasked with solar panel array foundation design.... we usually follow LRFD with the unfactored loads provided by the structural engineer.
How would this be any different than heavy mechanical machinery? Just have to consider the primary frequency responses of the structure and the foundation.
Buhler, R. and Cerato, A.B. (2010). Design of
Dynamically Wind-Loaded Helical Piers for
Small Wind Turbines.
ASCE Journal of Performance of Constructed Facilities.
Vol. 24, No. 4,
pp. 417-426.
Mainly testing under cyclic loading. Was available on line but U of O no longer hosting. Amy Cerato is at U of Oklahoma