Experimental and numerical study on the ultimate strength of stiffened plates subjected to combined biaxial compression and lateral loads

Ma, Hongyang; Xiong, Qunfei; Wang, Deyu

doi:10.1016/j.oceaneng.2021.108928

Cited by 30 publications

(3 citation statements)

References 18 publications

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“…In general, the bearing capacity of the plate and the stiffener on a stiffened plate is different [31]. The failed points on the stiffener and the failed points on the plate have different correlations with moment identification.…”

Section: Correlation Between Measuring Points At Different Structures...mentioning

confidence: 99%

A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification

Xu,

Gan,

et al. 2023

JMSE

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The identification of longitudinal bending moments is a critical component in the health monitoring of ship structures. This study examines the effect of the failure of measurement points on the accuracy of bending moment identification and presents a solution using an XGboost fitting method. The impact of failure point position and quantity on strain fitting accuracy and bending moment identification was investigated by performing a four-point bending experiment in typical failure scenarios. Further numerical analysis was conducted to identify potential sources of errors in the measurement process. Additionally, several XGBoost-based fitting schemes were tested under practical conditions to provide reliable fitting suggestions. The results indicated that the XGboost strain fitting method outperforms conventional methods for removing failed measurement points, resulting in improved accuracy of identification. When the most critical failure condition occurs (i.e., the deck plate measurement points and deck stiffener measurement points fail), the XGboost method can still estimate the strain at the failure points with acceptable accuracy. These results also hold in complex load scenarios. Moreover, in the practical measurement conditions, the arrangement of measuring points includes two sections that are sufficient to support the fitting of failed measurement points by using the XGboost method. The XGboost strain fitting method exhibits promising potential in strain fitting applications.

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Section: Correlation Between Measuring Points At Different Structures...mentioning

confidence: 99%

A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification

Xu,

Gan,

et al. 2023

JMSE

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“…eir results indicate that lateral load-carrying capacity drops with an increase in axial load and vice versa. Experimental and numerical investigations on the ultimate strength of stiffened plates subjected to combined biaxial compression and lateral loads showed that lateral pressure enhanced the loadcarrying capacity when the lateral force restrained deformation, as investigated by Ma et al [6]. Further, the ultimate and residual strength of a hull girder based on IACS CSR-H,CSR-OT, and CSR-BC were compared in detail by Shi et al [7].…”

Section: Introductionmentioning

confidence: 99%

Structural Resistance of Simplified Side Hull Models Accounting for Stiffener Design and Loading Type

Prabowo

Tuswan

Nurcholis

et al. 2021

Mathematical Problems in Engineering

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Thin-walled stiffened panels are fundamental structural components that form the primary structure of the ship hull. The effectiveness of the stiffener configuration design needs to be assessed because members are unavoidably subjected to various load types during operations. In this situation, assessment is required to quantify the responses and determine the relationship between the structural resistance and input parameters. The aim of this work was to obtain structural resistance data on the stiffened side hull of a medium-sized tanker with various model configurations by using finite element analysis with different loading parameters, i.e., load type and angle, as the main inputs. The results indicate that stiffener configurations subjected to loads at the center and random positions influence the effectiveness in reducing the deformation. The results show that the stiffener is more effective when the location of the force is very close to the stiffener. Therefore, higher strength can be obtained with a design in which the area that is not supported by the stiffener is minimized.

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“…At present, most analysis methods for stiffened panels can be summarized as numerical methods, analytical methods, and a combination of the two methods. The calculation models for the effective analysis of stiffened panels can be divided into finite element models (FEMs) [ 3 , 4 , 5 , 6 , 7 , 8 ], discrete stiffener models (DSMs) [ 9 ], and smeared stiffener models (SSMs) [ 10 ]. The stiffeners are modeled as members with axial bending/torsion stiffnesses on the attached skin in DSM, and they can only be effectively applied for the analysis of stiffened panels with thin skins and rigid stiffeners.…”

Section: Introductionmentioning

confidence: 99%

Estimating of the Static and Dynamic Behaviors of Orthogrid-Stiffened FRP Panel Using Reduced-Order Plate Model

et al. 2021

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The orthogrid-stiffened FRP panel (OSFP) is a generic structural element in weight-sensitive structure applications. Based on the variational asymptotic method, a 2D reduced-order plate model (2D-RPM) of OSFP was constructed through matching the strain energy of the original panel for static and dynamic analyses. The local field distributions were recovered using the recovery relationship and global response. The relative influences of select parameters on the effective performance of the OSFP were revealed by parametric studies. The comparative results showed that the effective performance of the OSFP predicted by the 2D-RPM were consistent with those predicted by the 3D finite element model, but the computational efficiency was greatly improved. The stiffener height had the greatest influence on the natural frequency of the panel. The layup configurations of laminates had significant influences on the equivalent stiffness and buckling load of the OSFP but had little effect on the vibration modes, which could be varied by adjusting the stiffening forms.

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Experimental and numerical study on the ultimate strength of stiffened plates subjected to combined biaxial compression and lateral loads

Cited by 30 publications

References 18 publications

A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification

A Strain Fitting Strategy to Eliminate the Impact of Measuring Points Failure in Longitudinal Bending Moment Identification

Structural Resistance of Simplified Side Hull Models Accounting for Stiffener Design and Loading Type

Estimating of the Static and Dynamic Behaviors of Orthogrid-Stiffened FRP Panel Using Reduced-Order Plate Model

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