Comparative analysis of three different models of navigational bridge wings

6th ModTech International Conference - Modern Technologies in Industrial Engineering

Juganaru, D.E.^1 ; Baboiu Pipirigeanu, I.L.^1 ; Faitar, C.^1 ; Popa Damaschin, V.^1

Constanta Maritime University, Faculty of Naval Electromechanics, Engineering Sciences in Mechanics, Environment Field Department, 104 Mircea cel Batran Street, Constanta

900663, Romania^1

关键词: Analytical studies;    Beam system;    Comparative analysis;    Critical moment;    Local vibrations;    Matlab- software;    Resonance frequencies;    Wing models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/400/8/082013/pdf
DOI  :  10.1088/1757-899X/400/8/082013

来源: IOP

【 摘 要 】

This paper focuses on the local vibration problems that occur at the extensions of the navigation bridges. These structures are modeled as systems composed of beams and analysed both from the analytical point of view and the FEM method, thus trying to determine the pulsations and modal forms of the structure. In critical moments, resonance is high, which has led to the modification of the shape of the wings. Thus, the wings models fixed by the structure of the laundry at one point and the other on the main deck were adopted. Methods and Research: Three wing models with fixed lengths, formed by beam systems fixed at certain points, under 90° and different materials are analysed. FEA was done using the FEMAP v11.2 software and the analytical study was done with the Matlab software. Results: The analysis shows that the beams' natural frequencies [00-90] are noticeably lower than the frequencies obtained in the other models. Also, the values of their natural frequencies are higher for FEM due to lack of damping. And AISI 1025 Steel proves to be more appropriate to the construction of the beams because it has lower resonance frequencies.