For the u-w and u-p formulations of 1-D harmonic response in saturated soil
a fourth order equation can be derived through these second order equations by elimination. General solution can be derived by solving this fourth order equation. For a special boundary value problem
analytical solution
which satisfies the boundary conditions
can be reached by solving the linear equations that include these boundary conditions. This analytical solution can be used in several research aspects of dynamic response in saturated soil.