Yes, Sir, I agree!
I am willing to believe each location of high amplitude vibration under consideration, in any direction as a sigle DOF problem with a force time history and an estimated mass (m) and stiffness(k) from Caesar -II simulation of piping - k from unit deflection at location in static analysis and m from maching the lowest natural freq at that location from CII modal analysis using 1DOF k-m model, k known beforehand.
Then, the sigle DOF problem can be solved using viscodamper in calculation and at site.
Is this approach making any sense, now ?
reg,
sam
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