考虑阻力作用的大跨度悬索桥颤振分析

Q4 Chemical Engineering

Applied and Computational Mechanics Pub Date : 2021-06-01 DOI:10.22055/JACM.2021.32481.2025

G. Piana, A. Carpinteri

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引用次数: 1

摘要

研究了拖曳力对明石海京大桥颤振速度和颤振频率的影响。在ANSYS中结合非定常升力和力矩作用进行有限元分析:(a)非定常阻力，(b)定常阻力，(c)无阻力。将有限元结果与基于半解析连续体模型的内部MATLAB代码得到的结果进行了比较，并与文献中的其他结果进行了比较。该连续模型除考虑非定常升力和力矩作用外，还将定常拖曳力引起的弯扭二阶效应纳入了桥梁的运动方程。结果表明，将定常阻力与非定常升力和力矩相结合，可以较好地预测颤振速度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Long-span Suspension Bridge Flutter Analysis with Drag Force Effects

The paper investigates the influence of the drag force onto the flutter velocity and frequency of the Akashi Kaikyo Bridge. Finite element analyses were run in ANSYS by combining unsteady lift and moment actions with: (a) unsteady drag, (b) steady drag, (c) no drag. The finite element results are compared to those obtained by an in-house MATLAB code based on a semi-analytic continuum model and with others from the literature. The continuum model includes flexural-torsional second-order effects induced by steady drag force into the bridge’s equations of motion, in addition to unsteady lift and moment actions. The results show that good predictions of the flutter velocity can be obtained by combining steady drag with unsteady lift and moment.

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来源期刊

Applied and Computational Mechanics Engineering-Computational Mechanics

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

14 weeks

期刊介绍： The ACM journal covers a broad spectrum of topics in all fields of applied and computational mechanics with special emphasis on mathematical modelling and numerical simulations with experimental support, if relevant. Our audience is the international scientific community, academics as well as engineers interested in such disciplines. Original research papers falling into the following areas are considered for possible publication: solid mechanics, mechanics of materials, thermodynamics, biomechanics and mechanobiology, fluid-structure interaction, dynamics of multibody systems, mechatronics, vibrations and waves, reliability and durability of structures, structural damage and fracture mechanics, heterogenous media and multiscale problems, structural mechanics, experimental methods in mechanics. This list is neither exhaustive nor fixed.