An empirical formulation for predicting the ultimate strength of stiffened panels subjected to longitudinal compression. (1st August 2017)

• Record Type: Journal Article
• Authors: Kim, D.K.; Lim, H.L.; Kim, M.S.; Hwang, O.J.; Park, K.S.
• Is Part Of: Ocean engineering. Volume 140(2017)
• Page Start: 270
• Page End: 280
• Publication Date: 2017-08-01
• Subjects: CSR-BC Common Structural Rule for Bulk Carrier -- CSR-OT Common Structural Rule for Double Hull Oil Tanker -- CSR-H Harmonised Common Structural Rule -- GBS Goal Based Standard -- CFM Closed Form Method -- IACS International Association of Classification Societies -- M1 Buckling assessment method in CSR-OT that buckling capacity with allowance for redistribution of load unless otherwise specified -- M2 Buckling assessment method in CSR-OT that buckling capacity with no allowance for redistribution of load unless otherwise specified -- Method A Buckling assessment method in CSR-H that all the edges of the elementary plate panel are forced to remain straight (but free to move in the in-plane directions) due to the surrounding structure/neighbouring plates -- Method B Buckling assessment method in CSR-H that the edges of the elementary plate panel are not forced to remain straight due to low in-plane stiffness at the edges and/or no surrounding structure/neighbouring plates -- PULS Panel Ultimate Limit State (= a computerized semi-analytical model proposed by DNV and used for CSR-OT) -- UP-A Unstiffened panels with method A in CSR-H -- UP-B Unstiffened panels with method B in CSR-H -- SP-A Stiffened panels with method A in CSR-H -- SP-B Stiffened panels with method B in CSR-H -- SP-M1 Stiffened panels with M1 in CSR-OT -- SP-M2 Stiffened panels with M2 in CSR-OT; Ultimate strength -- Longitudinal compression -- Stiffened panel -- Empirical formulation; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2017.05.031
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: There are several methods such as experimental, numerical, and analytical methods which are the mostly adopted in the verification of proposed design code or guidelines to calculate the ultimate strength performance of stiffened panel structures. This study proposes an advanced empirical formula shape, which is a function of plate slenderness ratio and column slenderness ratio with two (2) correction coefficients ( C 1 and C 2 ), used to predict the ultimate strength performance of stiffened panel structures in ships. In addition, the two aforementioned correction coefficients were decided and verified by obtaining the result of an ANSYS nonlinear finite element analysis. An average level of initial imperfection and 2 bay – 2 span (1/2 – 1 – 1/2) model were adopted in the proposed empirical formula. The effects of residual strength were not considered in this study. A total of 124 stiffened panels with four different plate slenderness ratios ( β ) and changing column slenderness ratio (λ) were selected for the simulation scenarios. To confirm the accuracy of the obtained formula, a statistical analysis was also conducted on the ANSYS results and other existing formulas. The proposed method and its details were documented. Highlights: An empirical formula for predicting the ultimate strength of stiffened panel is proposed. Comparative study was performed with existing formulas. The obtained design formula will be useful in judging the safety level of stiffened panel.