箱梁桥静力和自由振动响应的有限元分析

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2023-06-13 DOI:10.1108/mmms-12-2022-0277
M. F. Shaikh, Nallasivam K
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引用次数: 0

摘要

目的在本研究中,建立了一个箱梁桥和铁路子轨道系统的有限元模型,以预测印度铁路系统的不同组合和自由振动响应导致的不同固有频率及其相应振型所产生的静态行为。设计/方法/方法使用基于ANSYS软件的非闭合有限元法对桥梁和子轨道系统进行建模和评估。结果从分析中可以看出,在静态分析中确定了不同静载荷组合引起的变形和应力的最坏可能情况,而在自由振动分析中则确定了不同的固有频率,由于列车车辆的动力学效应,这些固有频率可用于进一步分析。研究局限性/含义目前的研究范围仅限于结构的静态和自由振动分析。然而,这项研究将有助于设计者获得相关信息,以便进一步分析桥梁模型的动力特性。原创性/价值在静态分析中,由于荷载组合5,桥面的最大变形为10.70E-03m,而自由振动分析的最大固有频率为4.7626 Hz。
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Static and free vibration response of a box-girder bridge using the finite element technique
PurposeIn this study, a finite element model of a box-girder bridge along with the railway sub-track system is developed to predict the static behavior due to different combinations of the Indian railway system and free vibration responses resulting in different natural frequencies and their corresponding mode shapes.Design/methodology/approachThe modeling and evaluation of the bridge and sub-track system were performed using non-closed form finite element method (FEM)-based ANSYS software.FindingsFrom the analysis, the worst possible cases of deformation and stress due to different static load combinations were determined in the static analysis, while different natural frequencies were determined in the free vibrational analysis that can be used for further analysis because of the dynamic effect of the train vehicle.Research limitations/implicationsThe scope of the current investigation is confined to the structure's static and free vibration analysis. However, this study will help the designers obtain relevant information for further analysis of the dynamic behavior of the bridge model.Originality/valueIn static analysis, the maximum deformation of the bridge deck was found to be 10.70E-03m due to load combination 5, whereas the maximum natural frequency for free vibration analysis is found to be 4.7626 Hz.
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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