煤矿井塔结构在脉动风荷载作用下的响应分析

发布时间：2018-04-21 00:02

本文选题：脉动风荷载 + 自回归模型　；参考：《合肥工业大学学报(自然科学版)》2014年11期

【摘要】：文章简述了风荷载特性与脉动风荷载的风速时程自回归(autoregressive,简称AR)数值模拟方法,模拟了给定风速功率谱的风速时程序列,并验证其与目标谱的一致性,从而得到作用在结构模型各节点上的脉动风荷载时程样本。以某煤矿井塔结构为例,用有限元分析软件SAP2000建立其有限元模型,并用Matlab获取了井塔结构迎风面各节点上的风荷载时程信号作为动力输入。利用SAP2000软件对结构进行模态分析,并基于时程分析方法计算结构在脉动风荷载作用下的风振响应。结果表明,AR模型能有效地模拟具有空间时间相关性的节点脉动风速时程,可为结构的安全性设计或结构的改造提供参考和依据。
[Abstract]:In this paper, the method of autoregressive autoregressive (ARV) numerical simulation of wind speed time history and pulsating wind load is briefly introduced. The sequence of time series of wind speed of given wind speed power spectrum is simulated, and the consistency of wind speed autoregressive time series with target spectrum is verified. The pulsating wind load samples acting on each node of the structural model are obtained. Taking a coal mine tower structure as an example, the finite element model is established by using the finite element analysis software SAP2000, and the time-history signal of wind load on each node on the upwind surface of the tower structure is obtained by Matlab as the dynamic input. The modal analysis of the structure is carried out by using SAP2000 software, and the wind-induced vibration response of the structure under pulsating wind load is calculated based on the time-history analysis method. The results show that the AR model can effectively simulate the nodal pulsating wind speed time history with spatial and temporal correlation, and can provide a reference and basis for the safety design of the structure or the reconstruction of the structure.
【作者单位】：合肥工业大学土木与水利工程学院;合肥工业大学仪器科学与光电工程学院;
【基金】：安徽省科技攻关计划资助项目(13010142124)
【分类号】：TU312.1;TU347

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