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Least squares estimate method in parameter identification of hysteretic damping system on the application of ubiquitous computing efficiency is not high, or complicated calculation, calculation accuracy is not high, there is always the problem such as error or error approximation ability is limited. Similar problem happened when inversion analysis of the defect is done in a component torsion wave...
On the issues of the pile nondestructive detection accuracy influenced by defect position and size, the torsional vibration calculation model is put forward based on one-dimensional wave theory. In the same pile parameters and exciting force, the testing performance is discussed about small defects and shallow defects by using torsional wave and longitudinal wave. The experiments verified that torsional...
According to the selection and evaluation of low strain stress wave signal feature for one-dimensional components damage detection, define the quantitative information entropy based on probability theory and mathematical statistical theory and information entropy, build the feature vector of stress wave signal with the quantitative information entropy based on the time-window, by using the multi-parameter...
Aiming at the defect non-destructive testing problem for one-dimensional rod-like structure, a time reversal based defect signal multi-modal propagation model is developed and a new one-dimensional structure non-destructive testing method based on time-reversal and multi-modal is proposed. Through analyzing the dispersion effect of guide waves in steel leading to signal distortion which means a single...
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