For an elastic body the values should be in phase and their ratio would give a mean value of the ground rigidity, varying with the distance from the coast. In fact the residues are not found exactly in phase, a result which can be attributed chiefly to an incomplete evaluation of the ...
Guy MorinDaniel CluisDenis CouillardH. Gérald JonesJean-Maurice Gauthiercanadian journal of civil engineering