This report looks at the active acoustic monitoring of offshore jacket structures. The principle behind the method is that changes in a structure can be detected via changes in acoustic transfer functions measured between appropriate points on the structure.
In this report we describe the results of numerical simulations and of physical experiments on a scale model. The construction of the scale model (a 1/100 scale plastic model of the Claymore jacket) was described in an earlier report. Numerical simulations indicate that the method is sound in principle. Experimental results show that it is also effective in practice, with damage location being accurate to within the length of a structural member.
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