某公路桥梁梁在复合重卡车多挂车通过下的动力分析

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Diego Gabriel Metz, Roberto Dalledone Machado, Marcos Arndt, Carlos Eduardo Rossigali
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引用次数: 0

摘要

摘要本文采用车桥相互作用的计算模型,对2轴、3轴、5轴和9轴的现实复合车辆进行了分析。车辆-桥梁相互作用(VBI)模型是由一组由质量、阻尼和刚度单元相互连接的二维刚性块组成的,以模拟其悬架系统。车辆以不同的速度通过。考虑到路面的维护等级,允许几种滚动表面轮廓。从实验数据库中生成谱密度函数,形成纵向表面不规则轮廓。考虑欧拉-伯努利梁模型,用Phyton编写了基于有限元法的计算程序。研究结果几种复合材料重型车辆模型已被制造出来,目前在主要道路上行驶。给出了每种复合材料车辆的动态放大系数。研究局限/启示复合重型车辆的VBI模型是二维的。社会意义这项工作有助于提高桥梁的安全性和使用寿命,以及车辆通过桥梁时的稳定性和舒适性。桥梁的结构响应受复合车辆的类型、大小、车速和路面的保守坡度的影响。此外,一个轴产生的振动可以与其他轴的振动叠加。这种效应会产生不寻常的动态响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic analysis of a highway bridge beam under the passage of compound heavy trucks with multiple trailers

Purpose

Realistic composite vehicles with 2, 3, 5 and 9 axles, consisting of a truck with one or two trailers, are addressed in this paper by computational models for vehicle–bridge interaction analysis.

Design/methodology/approach

The vehicle–bridge interaction (VBI) models are formed by sets of 2-D rigid blocks interconnected by mass, damping and stiffness elements to simulate their suspension system. The passage of the vehicles is performed at different speeds. Several rolling surface profiles are admitted, considering the maintenance grade of the pavement. The spectral density functions are generated from an experimental database to form the longitudinal surface irregularity profiles. A computational code written in Phyton based on the finite element method was developed considering the Euler–Bernoulli beam model.

Findings

Several models of composite heavy vehicles are presented as manufactured and currently travel on major roads. Dynamic amplification factors are presented for each type of composite vehicle.

Research limitations/implications

The VBI models for compound heavy vehicles are 2-D.

Social implications

This work contributes to improving the safety and lifetime of the bridges, as well as the stability and comfort of the vehicles when passing over a bridge.

Originality/value

The structural response of the bridge is affected by the type and size of the compound vehicles, their speed and the conservative grade of the pavement. Moreover, one axle produces vibrations that can be superposed by the vibrations of the other axles. This effect can generate not usual dynamic responses.

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来源期刊
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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