Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 458-472 |
| Journal | Structural health monitoring |
| Volume | 15 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 10 May 2016 |
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Keywords
- METIS-309298
- IR-100366
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Vibro-acoustic modulation–based damage identification in a composite skin–stiffener structure. / Ooijevaar, T.H.; Rogge, M.D.; Loendersloot, Richard; Warnet, Laurent; Akkerman, Remko; Tinga, Tiedo.
In: Structural health monitoring, Vol. 15, No. 4, 10.05.2016, p. 458-472.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Vibro-acoustic modulation–based damage identification in a composite skin–stiffener structure
AU - Ooijevaar, T.H.
AU - Rogge, M.D.
AU - Loendersloot, Richard
AU - Warnet, Laurent
AU - Akkerman, Remko
AU - Tinga, Tiedo
PY - 2016/5/10
Y1 - 2016/5/10
N2 - Vibro-acoustic modulation–based damage identification relies on the modulation of a high-frequency carrier signal by an intenser low-frequency vibration signal due to damage-induced structural nonlinearities. A time domain analysis of the vibro-acoustic modulation phenomena was presented at multiple spatial locations in an impact damaged composite skin–stiffener structure. The instantaneous amplitude and frequency of the carrier velocity response were extracted to analyze the intermodulation effects between the two excitation signals. Increased amplitude modulations at the damaged region revealed the presence, location, and length of the skin–stiffener damage. The damage hardly modulated the frequency of the carrier response. This difference in behavior was attributed to the nonlinear skin–stiffener interaction introduced by the periodic opening and closing of the damage, according to earlier research by authors on the same structure. A parametric study showed that the amplitude and phase of the amplitude modulation are dependent on the selected carrier excitation frequency, and hence the high-frequency wave field that is introduced. This work demonstrates not only the potential but also the complexity of the vibro-acoustic modulation based damage identification approach.
AB - Vibro-acoustic modulation–based damage identification relies on the modulation of a high-frequency carrier signal by an intenser low-frequency vibration signal due to damage-induced structural nonlinearities. A time domain analysis of the vibro-acoustic modulation phenomena was presented at multiple spatial locations in an impact damaged composite skin–stiffener structure. The instantaneous amplitude and frequency of the carrier velocity response were extracted to analyze the intermodulation effects between the two excitation signals. Increased amplitude modulations at the damaged region revealed the presence, location, and length of the skin–stiffener damage. The damage hardly modulated the frequency of the carrier response. This difference in behavior was attributed to the nonlinear skin–stiffener interaction introduced by the periodic opening and closing of the damage, according to earlier research by authors on the same structure. A parametric study showed that the amplitude and phase of the amplitude modulation are dependent on the selected carrier excitation frequency, and hence the high-frequency wave field that is introduced. This work demonstrates not only the potential but also the complexity of the vibro-acoustic modulation based damage identification approach.
KW - METIS-309298
KW - IR-100366
U2 - 10.1177/1475921716645107
DO - 10.1177/1475921716645107
M3 - Article
VL - 15
SP - 458
EP - 472
JO - Structural health monitoring
JF - Structural health monitoring
SN - 1475-9217
IS - 4
ER -