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RISS 인기검색어
- 검색키워드
- 저자 : Alireza Eslami-majd (검색결과 2 건)
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Blast response of corroded steel plates
Alireza Eslami-majd,Ahmad Rahbar-Ranji 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.5
Numerical results for one- and both-sided corroded steel plates subjected to blast loading are presented. Finite element analysis, withABAQUS software, is employed to determine the deformation and stress distributions. The results for the case of triangular pulse pressureon un-corroded plates are validated against literature-based data and then, detailed parametric studies are carried-out. The effects ofinfluential parameters including, plate aspect ratio, degree of pit and different ratio of pit depth at each sides of the plate are investigated. The results show that position of pitted surface in respect to applied pressure is the most influential parameter on reduction of dynamicload carrying capacity of pitted plates. By increasing degree of pitting, reduction of dynamic load carrying capacity decrease more.
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Free vibration analysis of corroded steel plates
Alireza Eslami-majd,Ahmad Rahbar-Ranji 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
Vibration analysis of unstiffened/stiffened plates has long been studied due to its importance in the design and condition assessmentsof ship and offshore structures. Corrosion is inevitable in steel structures and has been so far considered in strength analysis of structures. We studied the free vibration of pitted corroded plates with simply supported boundary conditions. Finite element analysis, withABAQUS, was used to determine the natural frequencies and mode shapes of corroded plates. Influential parameters including plateaspect ratio, degree of pit, one-sided/both-sided corroded plate, and different corrosion patterns were investigated. By increasing the degreeof corrosion, reduction of natural frequency increases. Plate aspect ratio and plate dimensions have no influence on reduction ofnatural frequency. Different corrosion patterns on the surface of one-sided corroded plates have little influence on reduction of naturalfrequency. Ratio of pit depth over plate thickness has no influence on the reduction of natural frequency. The reduction of natural frequencyin both-sided corroded plates is higher than one-sided corroded plates with the same amount of total corrosion loss. Mode shapesof vibration would change due to corrosion, except square mode shapes.
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