TY - JOUR
T1 - Structural health monitoring of fixed offshore structures using the bicoherence function of ambient vibration measurements
AU - Hillis, Andrew J.
AU - Courtney, C R P
PY - 2011/3/14
Y1 - 2011/3/14
N2 - This paper investigates the use of the bicoherence function of measured structural acceleration to provide automatic early detection of damage in an offshore structure. A detailed simulation model is developed, including realistic wave loading, and is used to assess the performance of the method. The method is shown through analytical and numerical analysis to be insensitive to typical operating parameter variations and to variations in wave excitation force. It is demonstrated that very small changes in stiffness of individual structural members are detectable from measurements of global structural motion.
AB - This paper investigates the use of the bicoherence function of measured structural acceleration to provide automatic early detection of damage in an offshore structure. A detailed simulation model is developed, including realistic wave loading, and is used to assess the performance of the method. The method is shown through analytical and numerical analysis to be insensitive to typical operating parameter variations and to variations in wave excitation force. It is demonstrated that very small changes in stiffness of individual structural members are detectable from measurements of global structural motion.
UR - http://www.scopus.com/inward/record.url?scp=78650717023&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/j.jsv.2010.09.019
U2 - 10.1016/j.jsv.2010.09.019
DO - 10.1016/j.jsv.2010.09.019
M3 - Article
SN - 0022-460X
VL - 330
SP - 1141
EP - 1152
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
IS - 6
ER -