Issue 58

R. Capozucca et alii, Frattura ed Integrità Strutturale, 58 (2021) 386-401; DOI: 10.3221/IGF-ESIS.58.28

MODE 1

MODE 2

Frequency [Hz]

Frequency [Hz]

Theor.

D0 275 275 276 275 275 275 275 275 275 275 275 275 275 275 275

D1 252 251 251 250 250 250 249 250 249 249 249 250 249 250 250

D2 228 227 226 228 228 227 228 228 228 227 226 226 228 228 227

D3 215 215 215 215 216 216 216 216 216 216 216 216 216 217 216

D4 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180

Theor.

D0 706 706 706 706 706 706 706 706 706 706 706 706 706 706 -

D1 686 686 685 685 685 684 684 684 684 684 684 684 684 685 -

D2 635 635 635 635 635 634 635 636 635 635 635 635 635 635 -

D3 579 580 579 579 580 580 580 581 581 581 581 581 582 580 -

D4 519 521 521 520 521 520 521 520 520 520 521 522 520 520 -

M1 M2 M3 M4 M5 M6 M7 M8 M9

308 308 308 308 308 308 308 308 308 308 308 308 308 308 308

848 848 848 848 848 848 848 848 848 848 848 848 848 848 848

M10 M11 M12 M13 M14

average

MODE 3

MODE 4

Frequency [Hz]

Frequency [Hz]

Theor.

D0

D1

D2

D3

D4 999 999

Theor.

D0

D1

D2

D3

D4

M1 M2 M3 M4 M5 M6 M7 M8 M9

1663 1663 1663 1663 1663 1663 1663 1663 1663 1663 1663 1663 1663 1663 1663

1274

1238 1237 1237 1235 1235 1233 1233 1233 1233 1233 1232 1232 1231 1234 -

1192 1149 1193 1193 1194 1195 1195 1195 1193 1193 1196 1196 1190 - -

1076 1079 1077 1075 1076 1079 1077 1077 1079 1080 1080 1079 1084 1078 -

2749 2749 2749 2749 2749 2749 2749 2749 2749 2749 2749 2749 2749 2749 2749

1875

1823 1824 1822 1822 1823 1822 1824 1821 1823 1824 1820 1816 1820 1822 -

1753 1753 1752 1751 1754 1751 1755 1755 1753 1753 1753 1753 1755 1753 -

1657 1658 1659 1658 1662 1662 1662

- - - - - - - - - - - - - -

- -

- - - -

1000

1274 1274

999 999

-

1000 1000 1000

1881

1274 1274 1274 1274 1275 1275 1274 1275 1274

- -

-

999

1878 1879

1663 1664

M10 M11 M12 M13 M14

-

1000 1001 1001

NC

NC

1878 1877

1665 1664

-

NC

-

average - Table 5: Average experimental frequency values recorded for all mark points Mi with i=1,…,14 at different damage degree on beam B0. 1000 1878 1661

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