Finite Element Analysis of a Double Beam connected with Elastic Springs

Hang, Do Thi; Tung, Nguyen Xuan; Tu, Doan Van; Lam, Nguyen Ngoc

doi:10.48084/etasr.6489

Eng. Technol. Appl. Sci. Res.

2024

DOI: 10.48084/etasr.6489

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Finite Element Analysis of a Double Beam connected with Elastic Springs

Do Thi Hang,

Nguyen Xuan Tung,

Doan Van Tu

et al.

Abstract: This paper develops a finite element method for double beams subjected to static loading. The double beam consists of two Euler–Bernoulli beams connected continuously by an elastic spring connection. The finite element for a double beam is formulated with eight degrees of freedom based on the Euler-Bernoulli beam theory. The finite element method is implemented in MATLAB software to analyze the behavior of the double beams. The MATLAB code calculates the displacements of both the upper and lower beams. Numeric… Show more

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Cited by 2 publications

References 21 publications

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FEM Structural Analysis for Ship's Beam Modification: A Case Study

Popa,

Manea,

Ristea-Komornicki

2024

Eng. Technol. Appl. Sci. Res.

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Classification is mandatory for all seagoing ships engaged in international trade worldwide, with regulations that require the strength of the hull construction to be confirmed. Upon completion of the ship's construction or during the execution of repair works in shipyards (reconversion works, modification of panels, replacement of equipment, etc.), the strength structure of the ship may be affected and the classification society must certify that it meets the requirements. Replacing old equipment sometimes implies some variations in overall dimensions, which may impose some changes (adjustments) on the layout of structural panel elements. This study applied the Finite Element Method (FEM) considering the von Mises theory in a case study of a beam modification with the support of the ANSYS software. This study used the reverse engineering method to investigate an already implemented solution.

show abstract

FEM Structural Analysis for Ship's Beam Modification: A Case Study

Popa,

Manea,

Ristea-Komornicki

2024

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

show abstract

Enhancing the Design of Dynamic Vibration Absorbers through Harmonic Analysis and Lumped Parallel Configuration

Jabbar,

Rao,

Khafaji

2024

Eng. Technol. Appl. Sci. Res.

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This work examines the utilization of negative mass and negative stiffness principles to enhance the effectiveness of Dynamic Vibration Absorbers (DVAs) for vibration attenuation developed in structures. The proposed idealized model aims to reduce the amplitude of resonance and expand the frequency stopband range to achieve vibration reduction by attaching two parallel dynamic vibration absorbers to the primary system. By incorporating stiffness, mass, and damping ratio for each one of the absorbers and in the presence of harmonic excitation, it is possible to expand the frequency range in which vibration may be suppressed, leading to a substantial decrease in the maximum vibration amplitude of the primary system and the stroke length of the absorbers. The Nelder-Mead method is successfully used as an optimization tool to obtain the best selection of the absorbers' design parameters that assure the best vibration attenuation and frequency stopband. The results indicate a strong association between the change in frequency and the decrease in vibration. In the instance of frequency response, the vibration amplitude decreased by an average of 91.46% across all three modes of the whole system. Another optimal selection exhibited the most significant enhancement, achieving an average reduction in vibration amplitude of 97.06% across all three modes. Finally, the results indicate that the suggested lumped parallel architecture of the absorbers with precisely adjusted negative mass and negative stiffness characteristics along with the presented optimization method, can greatly improve the effectiveness of reducing vibrations in various applications. The results illustrate a direct relationship between shifts in frequency and vibration. If the value of the shift is greater than 1 the vibration is decreased, while less than 1 means the worst form of reducing such magnitude. The most notable drop off in amplitude occurred when averaging a simple drop off of up to 91.46% for all three patterns where frequency shifts by Y=2.008.

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Finite Element Analysis of a Double Beam connected with Elastic Springs

Cited by 2 publications

References 21 publications

FEM Structural Analysis for Ship's Beam Modification: A Case Study

FEM Structural Analysis for Ship's Beam Modification: A Case Study

Enhancing the Design of Dynamic Vibration Absorbers through Harmonic Analysis and Lumped Parallel Configuration

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