Table 5 FEA results’ summary for cavity and non-cavity conditions
From: An impact echo method to detect cavities between railway track slabs and soil foundation
Cavity size (cm) | Sensor location (cm) | Frequency response (Hz) | Resonance duration (S) | Volume (cm3) | Ratio=∆X/∆Y | I=∆PSD/(∆Y*∆X) (W/HzS) | Observation | ||
|---|---|---|---|---|---|---|---|---|---|
L | W | D | |||||||
5 | 5 | 5 | 5 | 2420 | 0.018133206 | 18567.52 | 3.14 | 1690326 | Cavity condition |
5 | 5 | 5 | 10 | 2420 | 0.016119153 | 14842.93 | 3.117 | 1520670 | Cavity condition |
5 | 5 | 5 | 15 | 2420 | 0.011572216 | 12494.80948 | 2.633 | 1291115 | Cavity condition |
5 | 5 | 5 | 20 | 2420 | 0.009080399 | 10347.7319 | 1.837 | 1054919 | Cavity condition |
5 | 5 | 5 | 25 | 2420 | 0.008152887 | 9648.570873 | 1.266 | 985304.5 | Cavity condition |
5 | 5 | 1.25 | 5 | 2250 | 0.013833206 | 11315.75118 | 2.361 | 1332777 | Cavity condition |
5 | 5 | 1.25 | 10 | 2250 | 0.012119153 | 9515.772963 | 2.786 | 1119797 | Cavity condition |
5 | 5 | 1.25 | 15 | 2250 | 0.009722158 | 7933.948132 | 2.167 | 1009318 | Cavity condition |
5 | 5 | 1.25 | 20 | 2250 | 0.009080399 | 6748.995931 | 1.837 | 903218.6 | Cavity condition |
5 | 5 | 1.25 | 25 | 2250 | 0.008152887 | 6211.697865 | 0.803 | 793179.3 | Fair condition |
5 | 5 | 0.75 | 5 | 2178 | 0.01161351 | 7878.323055 | 1.371 | 929964.7 | Cavity condition |
5 | 5 | 0.75 | 10 | 2178 | 0.008381138 | 7189.101855 | 1.05 | 791446.4 | Fair condition |
5 | 5 | 0.75 | 15 | 2178 | 0.006826848 | 6658.593746 | 0.856 | 649308.4 | Fair condition |
5 | 5 | 0.75 | 20 | 2178 | 0.006592786 | 6099.384799 | 0.796 | 648325.7 | Fair condition |
5 | 5 | 0.75 | 25 | 2178 | 0.006382283 | 5482.158766 | 0.629 | 590533.7 | Good condition |
5 | 5 | 0.3 | 5 | 2124 | 0.009028469 | 4112.444302 | 1.05 | 824824.7 | Fair condition |
5 | 5 | 0.3 | 10 | 2124 | 0.008932686 | 3989.324802 | 0.858 | 607984.9 | Fair condition |
5 | 5 | 0.3 | 15 | 2124 | 0.007591469 | 3589.617629 | 0.737 | 575679.6 | Good condition |
5 | 5 | 0.3 | 20 | 2124 | 0.005950318 | 3298.131422 | 0.645 | 559388.5 | Good condition |
5 | 5 | 0.3 | 25 | 2124 | 0.005942065 | 3294.030099 | 0.558 | 530918.6 | Good condition |
Non-cavity | 5 | 2112 | 0.004680945 | 3683.685677 | 0.711 | 433452.2 | Good condition | ||
Non-cavity | 10 | 2112 | 0.004532605 | 3253.757776 | 0.646 | 426242 | Good condition | ||
Non-cavity | 15 | 2112 | 0.004271587 | 3013.219011 | 0.558 | 412116.1 | Good condition | ||
Non-cavity | 20 | 2112 | 0.004214606 | 2808.013438 | 0.475 | 399226.9 | Good condition | ||
Non-cavity | 25 | 2112 | 0.003906566 | 2773.609004 | 0.45 | 393622.1 | Good condition | ||