Idealized Structural Unit Method for Collapse Analyses of Stiffened Plate Structures

2003 ◽  
Vol 50 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Patrick Kaeding ◽  
Masahiko Fujikubo ◽  
◽  
Keyword(s):  
Structural Unit ◽  
Stiffened Plate ◽  
Plate Structures

Integrated design optimization of stiffened plate structures

1999 ◽  
Vol 16 (8) ◽  
pp. 934-952 ◽  
Author(s):  
F. Belblidia ◽  
S.M.B. Afonso ◽  
E. Hinton ◽  
G.C.R. Antonino
Keyword(s):  
Design Optimization ◽  
Integrated Design ◽  
Stiffened Plate ◽  
Plate Structures

An Equivalent 3-D Method for Analyzing Orthogonally Stiffened Plate Structures

1987 ◽  
Vol 31 (02) ◽  
pp. 101-106
Author(s):  
Kyu Nam Cho ◽  
William S. Vorus
Keyword(s):  
Bridge Decks ◽  
Three Dimensional ◽  
Stiffened Plate ◽  
Plate Structures ◽  
Work Related ◽  
Beam Elements ◽  
Proposed Model ◽  
The Relationship

A new three-dimensional method is proposed for analyzing orthogonally stiffened grillage structures. The method is based on earlier work related to bridge decks. The relationship between system displacement and loads is described mathematically, and matrices are developed to examine the shear compatibility between plate and beam elements. The paper concludes with a comparison between deflections obtained by several different procedures and the proposed model.

scholarly journals Plate and Stiffened Plate Units of the Idealized Structural Unit Method (2nd Report)

1986 ◽  
Vol 1986 (160) ◽  
pp. 318-336 ◽  
Author(s):  
Yukio Ueda ◽  
Sherif M. H. Rashed ◽  
Jeom Kee Paik
Keyword(s):  
Structural Unit ◽  
Stiffened Plate

Full-Scale Measurements of Welding-Induced Initial Deflections and Residual Stresses in Steel-Stiffened Plate Structures

2018 ◽  
Vol Vol 160 (A4) ◽  
Author(s):  
M S Yi ◽  
C M Hyun ◽  
J K Paik
Keyword(s):  
Residual Stresses ◽  
Ultimate Strength ◽  
Computational Models ◽  
Plate Thickness ◽  
Offshore Structures ◽  
Full Scale ◽  
Stiffened Plate ◽  
Plate Structures ◽  
Initial Imperfections ◽  
Numerical Predictions

Plated structures such as ships and offshore structures are constructed using welding techniques that attach support members (or stiffeners) to the plating. During this process, initial imperfections develop in the form of initial deformations (deflections or distortions) and residual stresses. These initial imperfections significantly affect the buckling and ultimate strength of these structures. Therefore, to assess the strength of welded plate structures, it is very important to predict the magnitude and pattern of welding-induced initial imperfections and their effects on buckling and ultimate strength. To determine the reliability of the prediction methods, it is desirable to validate the theoretical or numerical predictions of welding-induced initial imperfections through comparison with full-scale actual measurements. However, full-scale measurement databases are lacking, as they are costly to obtain. This study contributes to the development of a full-scale measurement database of welding-induced initial imperfections in steel-stiffened plate structures. The target structures are parts of real (full-scale) deckhouses in very large crude oil carrier class floating, production, storage and offloading unit structures. For parametric study purposes, four test structures by varying plate thickness are measured while the stiffener types and weld bead length are fixed. Modern technologies for measuring initial deformations and residual stresses are applied. The details of the measurement methods are documented for the use of other researchers and practicing engineers who want to validate their computational models for predicting welding-induced initial imperfections.

scholarly journals An Impact Location Algorithm for Spacecraft Stiffened Structure Based on Posterior Possibility Correlation

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 368 ◽  
Author(s):  
Lei Qi ◽  
Zhoumo Zeng ◽  
Lichen Sun ◽  
Xiaobo Rui ◽  
Fan Fan ◽  
...  
Keyword(s):  
Posterior Probability ◽  
Cross Correlation ◽  
Bayesian Posterior Probability ◽  
Probability Method ◽  
Stiffened Plate ◽  
Plate Structures ◽  
Impact Location ◽  
Weight Method ◽  
Location Algorithm ◽  
The Impact

In order to ensure the safety of spacecrafts in orbit, impact location is an important part of structural health monitoring systems. In this paper, an impact location algorithm based on posterior probability correlation is proposed to solve the problem, that is, the impact point in the stiffened structure of a spacecraft is difficult to locate. The algorithm combines the Gaussian cross-correlation possibility weight method and the Bayesian posterior probability method. The cross-correlation possibility weight superposition based on grids was used to reduce the dependence of the accuracy of time difference extraction. Gaussian and normalized fitting were used to compensate the reflection, modal transformation, and amplitude attenuation of a stiffened plate. The location result was further optimized by the posterior probability. The proposed algorithm can be applied to the impact source localization of complex stiffened plate structures. The experiment results showed that the average location error can be 2.57 cm with proper sensor network schemes.

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