Table 4 Summary of the FE results analytical analysis
From: An impact echo method to detect cavities between railway track slabs and soil foundation
Cavity size (cm) | TCL (cm) | HSB (cm) | T distance (cm) | d Distance (cm) | fr (Hz) | fd (Hz) |
|---|---|---|---|---|---|---|
5 × 5 × 5 | 25 | 50 | 55.5 | 22.5 | 102 | 2342 |
5 × 5 × 1.25 | 24.375 | 2256 | ||||
5 × 5 × 0.75 | 24.625 | 2144 |