So here we go....I routinely handle vibration problems....sometimes the effects on buildings from an adjacent source of vibration (i.e. machinery, traffic, etc.). Sometimes I estimate the motion of some structures by saying the (attenuated) ground displacements just adjacent to the structure will be how the foundation will move. (In other words, it's like a support motion problem from structural dynamics.)

I have to admit a level of discomfort with this model.....in some cases, it seems excessively conservative. Forgetting about wave reflection and other losses......saying the free field displacements are going to be what occurs under a heavy structure doesn't seem right to me. I've thought about thinking about it more as a force transfer situation (than a assumed displacement problem)......but I'm not sure about that.

I've also thought about refining the Rayleigh wave guide to somehow reflect this.....but every paper I've seen on this.....the math is just about impenetrable.

Does anyone have any (practical) ideas?