地震作用下管道-土耦合结构非平稳随机振动分析

赵岩; 贾甜; 周瑞鹏

doi:10.21656/1000-0887.380333

地震作用下管道-土耦合结构非平稳随机振动分析

doi: 10.21656/1000-0887.380333

赵岩^1,2,
贾甜²,
周瑞鹏²

¹桥梁工程结构动力学国家重点实验室(招商局重庆交通科研设计院有限公司),重庆 400067;²大连理工大学工程力学系,辽宁大连 116023

基金项目: 国家自然科学基金（11772084）;国家重点基础研究发展计划（973计划）（2015CB057804）;中央高校基本科研业务费（DUT17ZD311）

详细信息

作者简介:
赵岩(1974—)，男，副教授(通讯作者. E-mail: yzhao@dlut.edu.cn).

中图分类号: O324
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- 被引次数: 0
出版历程
- 收稿日期: 2017-12-25
- 修回日期: 2018-01-26
- 刊出日期: 2018-05-15

Non-Stationary Radom Vibration Analysis of Coupled Pipeline-Soil Systems Under Earthquake

¹State Key Laboratory of Bridge Engineering Structural Dynamics(China Merchants Chongqing Communications Research & Design Institute Co., Ltd.), Chongqing 400067, P.R.China;²Department of Engineering Mechanics, Dalian University of Technology,Dalian, Liaoning 116023, P.R.China

Funds: The National Natural Science Foundation of China（11772084）;The National Basic Research Program of China(973 Program)（2015CB057804）

摘要

摘要: 考虑地震载荷的非平稳特性和相干特性，建立了地下管道-土耦合结构随机振动分析的一种频域方法.应用Fourier-Stieltjes积分描述非平稳随机过程，由核函数刻画地震载荷的幅值和频率成份等时变特性；同时引入指数型衰减函数描述地震载荷的空间分布特性.在频域上结合虚拟激励法和Fourier(傅里叶)分析技术，推导了地下管道-土耦合结构受具有相干特征非平稳随机载荷作用下的响应演变功率谱的闭合解，建立了随机振动输入和输出的频域关系.数值算例与传统的分析方法进行对比验证，说明了建立方法的正确性和有效性；进一步研究了不同土参数变化以及不同端部约束条件下管道结构随机振动行为规律.
- 幅频非平稳 /
- 管道-土耦合结构 /
- 随机振动 /
- 虚拟激励法 /
- 频域方法
Abstract: According to the non-stationary and coherent characteristics of seismic load, a frequency-domain method for random vibration analysis of underground pipeline-soil structures was proposed. The Fourier-Stieltjes integral was used to describe the non-stationary stochastic process, and the time-dependent characteristics of the amplitude and frequency components of the seismic load were depicted by its kernel function; the exponential decay function was used to describe the spatial distribution of seismic load. Based on the combination of the pseudo-excitation method and the Fourier analysis technique in the frequency domain, the closed-form solution of the response evolution power spectrum of the pipeline-soil structure was derived under the coherent and non-stationary random loading, and the frequency-domain relation between the input and the output of the random vibration was established. In numerical examples, the proposed method was compared with the traditional calculating methods, and the correctness and validity of the method were illustrated. Furthermore, the mechanism of random vibration behavior of the pipeline with changing soil parameters and different end constraints were studied.
- amplitude-frequency non-stationarity /
- coupled pipeline-soil structure /
- random vibration /
- pseudo-excitation method /
- frequency-domain method

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参考文献(17)

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