In general we recommend mounting the Surface mount package near a PCB mounting point (screw hole, stand off) to avoid a 'trampolene' effect of the PCB. Some of our customer embed the sensor in epoxy also for mechanical rigidity.
Here are some comments from one of our dynamicists regarding testing:
"we bolt the Shaker Board to an interface fixture using a 90mil thick PCB. That fixture is bolted (using 4 point attachment method) directly to the shaker armature and gives us adequate coupling..."
