论文部分内容阅读
A model based damage identification was proposed by facilitating parameter sensitivity analysis and applied to a general overhead travelling crane.As updating reference data,experimental modal frequency was obtained by operational modal analysis(OMA)under ambient excitation.One dimensional damage function was defined to identify the damage by bending stiffness.The results showed that the model updating method could locate the damage and quantitatively describe the structure.The average error of eigenvalues between updated model analysis and the experimental results was less than 4% which proved the accuracy reliable.The comparison of finite element analysis and the test results of the deflection under the capacity load further verified the feasibility of this method.
A model based damage identification was proposed by facilitating parameter sensitivity analysis and applied to a general overhead traveling crane. As updating reference data, experimental modal frequency was obtained by operational modal analysis (OMA) under ambient excitation. One dimensional damage function was defined to identify the damage by quantitative updating describe could the locate the damage and quantitatively describe the structure.The average error of eigenvalues between updated model analysis and the experimental results was less than 4% which proved the accuracy reliable. comparison of finite element analysis and the test results of the deflection under the capacity load further verified the feasibility of this method.