EvaluatingAFeatureExtraction AlgorithmForDamageDetection of OffshoreJacketPlatforms UsingPhysicalModelAnd FiniteElement Model Updating

نشریه مهندسی دریا

Mohammad Ali Lotfollahi3¹  Farhad Hosseinlou¹  Alireza Mojtahedi¹ 

[1] university of tabriz;

关键词: offshorejacketplatforms;    damage detection;    model updating;    model reduction;    sensitivity analysis.;   

DOI  :  

来源: DOAJ

【 摘 要 】

One of the most important items in the field of engineering and design of structures is safety assessment. It is usually complicated, due to uncertainty in determining the most important parameters in the final design. This paper describes a new method for updating stiffness matrix structure that is capable of identifying the damage to individual members, when limited modal data is available by using results of the experiment on physical model of the offshore jacket platforms. We evaluated selection procedure inactive degrees of freedom in the process reduced model with a reasonable criterion by using the sensitivity analysis of system response under base excitation. This performance leads to faster convergence of iterative algorithm. Also, in this study, with using the finite element model updating based on the empirical models, it was considered during the process as much as possible to overcome the problem of uncertainty in modeling.

【 授权许可】

Unknown