水火弯板残余变形预报的数值和量纲分析(英文) |
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作者单位: | |
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摘 要: |
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关 键 词: | 残余变形 三维分析 数值模拟 有限元分析 计算时间 暖气 测线 多重回归分析 |
Numerical and dimensional analysis for prediction of line heating residual deformations |
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Authors: | Pankaj Biswas Nisith Ranjan Mandal Om Prakash Sha |
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Institution: | Department of Ocean Engineering and Naval Architecture,IIT, Kharagpur 721302, India |
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Abstract: | Line heating process is a very complex phenomenon as a variety of factors affects the amount of residual deformations. Numerical
thermal and mechanical analysis of line heating for prediction of residual deformation is time consuming. In the present work
dimensional analysis has been presented to obtain a new relationship between input parameters and resulting residual deformations
during line heating process. The temperature distribution and residual deformations for 6 mm, 8 mm, 10 mm and 12 mm thick
steel plates were numerically estimated and compared with experimental and published results. Extensive data generated through
a validated FE model were used to find co-relationship between the input parameters and the resulting residual deformation
by multiple regression analysis. The results obtained from the deformation equations developed in this work compared well
with those of the FE analysis with a drop in the computation time in the order of 100 (computational time required for FE
analysis is around 7 200 second to 9 000 seconds and where the time required for getting the residual deformation by developed
equations is only 60 to 90 seconds). |
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Keywords: | dimensional analysis 3-D finite element analysis elasto-plastic analysis residual deformations multiple regression analysis oxy-acetylene gas flame |
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