Skip to main content

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