| A Finite Element Method for Cracked Components of Structures |
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| 作者姓名： | 刘立名 段梦兰 秦太验 刘玉标 柳春图 余建星 |
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| 作者单位： | School of Civil Engineering，Tianjin University，Dalian University of Technology，China Classification Society，Institute of Mechanics，Chinese Academy of Sciences，Institute of Mechanics，Chinese Academy of Sciences，School of Civil Engineering，Tianjin University Tianjin 300072，China，Dalian 116024，China，Beijing 100006，Beijing 100080，China，Beijing 100080，China，Tianjin 300072，China，China |
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| 摘 要： | 1 .IntroductionOffshoreplatformsarelargescalesteelorconcretestructures.Theyexperiencevariouskindsofdamagessuchasdents ,corrosionpits ,cracks ,deformation ,etc .,afteryearsofenvironmentalimpactofwinds ,waves ,currents ,soilreactions ,earthquakesandice (DuanandLiu ,1 995) .Thesafetyofthestructureshasalwaysbeenthemostimportantissueconcerned ,anditdependsontheassessmentoftheintegrityofthestructures,orspecificallyontheassessmentofthedamagesinthestructures .Riclesetal.( 1 994)experimentallyinvestig…
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A Finite Element Method for Cracked Components of Structures |
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| LIU Li-ming a,DUAN Meng-lan b,QIN Tai-yan c LIU Yu-biao d,LIU Chun-tu d and YU Jian-xing a aSchool of Civil Engineering,Tianjin University,Tianjin ,China bDalian University of Technology,Dalian ,China cChina Classification Society,Beijing ,China dInstitute of Mechanics,Chinese Academy of Sciences,Beijing ,China.A Finite Element Method for Cracked Components of Structures[J].China Ocean Engineering,2003,17(2). |
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| Authors: | LIU Li-ming a DUAN Meng-lan b QIN Tai-yan c LIU Yu-biao d LIU Chun-tu d and YU Jian-xing a aSchool of Civil Engineering Tianjin University Tianjin China bDalian University of Technology Dalian China cChina Classification Society Beijing China dInstitute of Mechanics Chinese Academy of Sciences Beijing China |
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| Institution: | LIU Li-ming a,DUAN Meng-lan b,1,QIN Tai-yan c LIU Yu-biao d,LIU Chun-tu d and YU Jian-xing a aSchool of Civil Engineering,Tianjin University,Tianjin 300072,China bDalian University of Technology,Dalian 116024,China cChina Classification Society,Beijing 100006,China dInstitute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China |
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| Abstract: | In this paper, a method is developed for determining the effective stiffness of the cracked component. The stiffness matrix of the cracked component is integrated into the global stiffness matrix of the finite element model of the global platform for the FE calculation of the structure in any environmental conditions. The stiffness matrix equation of the cracked component is derived by use of the finite variation principle and fracture mechanics. The equivalent parameters defining the element that simulates the cracked component are mathematically presented, and can be easily used for the FE calculation of large scale cracked structures together with any finite element program. The theories developed are validated by both lab tests and numerical calculations, and applied to the evaluation of crack effect on the strength of a fixed platform and a self-elevating drilling rig. |
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| Keywords: | offshore platform finite element crack damage fracture mechanics stiffness matrix component |
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