Discussion on the Theoretical Basis for Cross-Over Method Applied to Downhole Wave Velocity Test

<div>Analytical method result. (a) Approximate Heaviside unit function used for the analytical method. (b) Displacements of 2 m and 8 m in an elastic half-space directly below the surface tangential point source. Poisson’s ratio is 0.25.</div>

Shock and Vibration

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Figure 3

Figure 3: Discussion on the Theoretical Basis for Cross-Over Method Applied to Downhole Wave Velocity Test 