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A New Two-Phase Method for Damage Detection in Skeletal Structures
Abstract One of the objective functions used in damage detection problems is the one in which the difference of natural frequencies and mode shapes for the actual and computed damage scenarios are compared simultaneously. Using this type of objective function, one can locate the damage and quantify its severity in a single step. In this paper, a new version of these objective functions is presented in order to decrease the burden of the calculations of the former methods. The presented method has two phases, in the first phase, the natural frequencies are calculated, and in the second phase, the mode shapes are evaluated. The second phase is performed only if the natural frequencies of the computed solution obtained from the first phase are equal to the natural frequencies of the considered scenario. Hence, the number of evaluating modes is considerably decreased. In order to demonstrate the efficiency of the new objective function, the accelerated water evaporation optimization algorithm is utilized for damage detection of three different skeletal structures using different scenarios. Additionally, the numbers of calculated fractions in each iteration of the single-phase and two-phase methods are compared, to show the reduction in the volume of the operations.
A New Two-Phase Method for Damage Detection in Skeletal Structures
Abstract One of the objective functions used in damage detection problems is the one in which the difference of natural frequencies and mode shapes for the actual and computed damage scenarios are compared simultaneously. Using this type of objective function, one can locate the damage and quantify its severity in a single step. In this paper, a new version of these objective functions is presented in order to decrease the burden of the calculations of the former methods. The presented method has two phases, in the first phase, the natural frequencies are calculated, and in the second phase, the mode shapes are evaluated. The second phase is performed only if the natural frequencies of the computed solution obtained from the first phase are equal to the natural frequencies of the considered scenario. Hence, the number of evaluating modes is considerably decreased. In order to demonstrate the efficiency of the new objective function, the accelerated water evaporation optimization algorithm is utilized for damage detection of three different skeletal structures using different scenarios. Additionally, the numbers of calculated fractions in each iteration of the single-phase and two-phase methods are compared, to show the reduction in the volume of the operations.
A New Two-Phase Method for Damage Detection in Skeletal Structures
Kaveh, A. (author) / Hosseini Vaez, S. R. (author) / Hosseini, P. (author) / Fathali, M. A. (author)
2018-11-03
17 pages
Article (Journal)
Electronic Resource
English
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